Datasheet Complete SAM D21E, SAM D21G, SAM D21J (Microchip) - 5

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32-bit ARM-Based Microcontrollers
17. SYSCTRL – System Controller... 150 17.1. Overview.. 150 17.2. Features... 150 17.3. Block Diagram.. 152 17.4. Signal Description.. 152 17.5. Product Dependencies... 152 17.6. Functional Description..154 17.7. Register Summary..170 17.8. Register Description... 172 18. WDT – Watchdog Timer.. 205 18.1. Overview.. 205 18.2. Features... 205 18.3. Block Diagram.. 206 18.4. Signal Description.. 206 18.5. Product Dependencies... 206 18.6. Functional Description..207 18.7. Register Summary..212 18.8. Register Description... 212 19. RTC – Real-Time Counter... 218 19.1. Overview.. 218 19.2. Features... 218 19.3. Block Diagram.. 219 19.4. Signal Description.. 219 19.5. Product Dependencies... 219 19.6. Functional Description..221 19.7. Register Summary..226 19.8. Register Description... 229 20. DMAC – Direct Memory Access Controller... 252 20.1. Overview.. 252 20.2. Features... 252 20.3. Block Diagram.. 254 20.4. Signal Description.. 254 20.5. Product Dependencies... 254 20.6. Functional Description..255 20.7. Register Summary..275 20.8. Register Description... 276 20.9. Register Summary - SRAM.. 299 20.10. Register Description - SRAM... 299 21. EIC – External Interrupt Controller.. 305 21.1. Overview.. 305 21.2. Features... 305 21.3. Block Diagram.. 305 21.4. Signal Description.. 306 21.5. Product Dependencies... 306 © 2017 Microchip Technology Inc.
Datasheet Complete
40001882A-page 5 Document Outline Introduction Features Table of Contents 1. Description 2. Configuration Summary 3. Ordering Information 3.1. SAM D21E 3.2. SAM D21G 3.3. SAM D21J 3.4. Device Identification 4. Block Diagram 5. Pinout 5.1. SAM D21J 5.1.1. QFN64 / TQFP64 5.1.2. UFBGA64 5.2. SAM D21G 5.2.1. QFN48 / TQFP48 5.2.2. WLCSP45 5.3. SAM D21E 5.3.1. QFN32 / TQFP32 5.3.2. WLCSP35 6. Signal Descriptions List 7. I/O Multiplexing and Considerations 7.1. Multiplexed Signals 7.2. Other Functions 7.2.1. Oscillator Pinout 7.2.2. Serial Wire Debug Interface Pinout 7.2.3. SERCOM I2C Pins 7.2.4. GPIO Clusters 7.2.5. TCC Configurations 8. Power Supply and Start-Up Considerations 8.1. Power Domain Overview 8.2. Power Supply Considerations 8.2.1. Power Supplies 8.2.2. Voltage Regulator 8.2.3. Typical Powering Schematics 8.2.4. Power-Up Sequence 8.2.4.1. Minimum Rise Rate 8.2.4.2. Maximum Rise Rate 8.3. Power-Up 8.3.1. Starting of Clocks 8.3.2. I/O Pins 8.3.3. Fetching of Initial Instructions 8.4. Power-On Reset and Brown-Out Detector 8.4.1. Power-On Reset on VDDANA 8.4.2. Brown-Out Detector on VDDANA 8.4.3. Brown-Out Detector on VDDCORE 9. Product Mapping 10. Memories 10.1. Embedded Memories 10.2. Physical Memory Map 10.3. NVM Calibration and Auxiliary Space 10.3.1. NVM User Row Mapping 10.3.2. NVM Software Calibration Area Mapping 10.3.3. Serial Number 11. Processor And Architecture 11.1. Cortex M0+ Processor 11.1.1. Cortex M0+ Configuration 11.1.2. Cortex-M0+ Peripherals 11.1.3. Cortex-M0+ Address Map 11.1.4. I/O Interface 11.1.4.1. Overview 11.1.4.2. Description 11.2. Nested Vector Interrupt Controller 11.2.1. Overview 11.2.2. Interrupt Line Mapping 11.3. Micro Trace Buffer 11.3.1. Features 11.3.2. Overview 11.4. High-Speed Bus System 11.4.1. Features 11.4.2. Configuration 11.4.3. SRAM Quality of Service 11.5. AHB-APB Bridge 11.6. PAC - Peripheral Access Controller 11.6.1. Overview 11.6.2. Register Description 11.6.2.1. PAC0 Register Description 11.6.2.1.1. Write Protect Clear 11.6.2.1.2. Write Protect Set 11.6.2.2. PAC1 Register Description 11.6.2.2.1. Write Protect Clear 11.6.2.2.2. Write Protect Set 11.6.2.3. PAC2 Register Description 11.6.2.3.1. Write Protect Clear 11.6.2.3.2. Write Protect Set 12. Peripherals Configuration Summary 13. DSU - Device Service Unit 13.1. Overview 13.2. Features 13.3. Block Diagram 13.4. Signal Description 13.5. Product Dependencies 13.5.1. IO Lines 13.5.2. Power Management 13.5.3. Clocks 13.5.4. DMA 13.5.5. Interrupts 13.5.6. Events 13.5.7. Register Access Protection 13.5.8. Analog Connections 13.6. Debug Operation 13.6.1. Principle of Operation 13.6.2. CPU Reset Extension 13.6.3. Debugger Probe Detection 13.6.3.1. Cold Plugging 13.6.3.2. Hot Plugging 13.7. Chip Erase 13.8. Programming 13.9. Intellectual Property Protection 13.10. Device Identification 13.10.1. CoreSight Identification 13.10.2. Chip Identification Method 13.11. Functional Description 13.11.1. Principle of Operation 13.11.2. Basic Operation 13.11.2.1. Initialization 13.11.2.2. Operation From a Debug Adapter 13.11.2.3. Operation From the CPU 13.11.3. 32-bit Cyclic Redundancy Check CRC32 13.11.3.1. Starting CRC32 Calculation 13.11.3.2. Interpreting the Results 13.11.4. Debug Communication Channels 13.11.5. Testing of On-Board Memories MBIST 13.11.6. System Services Availability when Accessed Externally 13.12. Register Summary 13.13. Register Description 13.13.1. Control 13.13.2. Status A 13.13.3. Status B 13.13.4. Address 13.13.5. Length 13.13.6. Data 13.13.7. Debug Communication Channel 0 13.13.8. Debug Communication Channel 1 13.13.9. Device Identification 13.13.10. CoreSight ROM Table Entry 0 13.13.11. CoreSight ROM Table Entry 1 13.13.12. CoreSight ROM Table End 13.13.13. CoreSight ROM Table Memory Type 13.13.14. Peripheral Identification 4 13.13.15. Peripheral Identification 0 13.13.16. Peripheral Identification 1 13.13.17. Peripheral Identification 2 13.13.18. Peripheral Identification 3 13.13.19. Component Identification 0 13.13.20. Component Identification 1 13.13.21. Component Identification 2 13.13.22. Component Identification 3 14. Clock System 14.1. Clock Distribution 14.2. Synchronous and Asynchronous Clocks 14.3. Register Synchronization 14.3.1. Common Synchronizer Register Synchronization 14.3.1.1. Overview 14.3.1.2. Write-Synchronization 14.3.1.3. Read-Synchronization 14.3.1.4. Completion of synchronization 14.3.1.5. Read Request 14.3.1.6. Enable Write-Synchronization 14.3.1.7. Software Reset Write-Synchronization 14.3.1.8. Synchronization Delay 14.3.2. Distributed Synchronizer Register Synchronization 14.3.2.1. Overview 14.3.2.2. General Write synchronization 14.3.2.3. General read synchronization 14.3.2.4. Completion of synchronization 14.3.2.5. Enable Write-Synchronization 14.3.2.6. Software Reset Write-Synchronization 14.3.2.7. Synchronization Delay 14.4. Enabling a Peripheral 14.5. Disabling a Peripheral 14.6. On-demand, Clock Requests 14.7. Power Consumption vs. Speed 14.8. Clocks after Reset 15. GCLK - Generic Clock Controller 15.1. Overview 15.2. Features 15.3. Block Diagram 15.4. Signal Description 15.5. Product Dependencies 15.5.1. I/O Lines 15.5.2. Power Management 15.5.3. Clocks 15.5.4. DMA 15.5.5. Interrupts 15.5.6. Events 15.5.7. Debug Operation 15.5.8. Register Access Protection 15.5.9. Analog Connections 15.6. Functional Description 15.6.1. Principle of Operation 15.6.2. Basic Operation 15.6.2.1. Initialization 15.6.2.2. Enabling, Disabling and Resetting 15.6.2.3. Generic Clock Generator 15.6.2.4. Enabling a Generic Clock Generator 15.6.2.5. Disabling a Generic Clock Generator 15.6.2.6. Selecting a Clock Source for the Generic Clock Generator 15.6.2.7. Changing Clock Frequency 15.6.2.8. Duty Cycle 15.6.2.9. Generic Clock Output on I/O Pins 15.6.3. Generic Clock 15.6.3.1. Enabling a Generic Clock 15.6.3.2. Disabling a Generic Clock 15.6.3.3. Selecting a Clock Source for the Generic Clock 15.6.3.4. Configuration Lock 15.6.4. Additional Features 15.6.4.1. Indirect Access 15.6.4.2. Generic Clock Enable after Reset 15.6.5. Sleep Mode Operation 15.6.5.1. Sleep Walking 15.6.5.2. Run in Standby Mode 15.6.6. Synchronization 15.7. Register Summary 15.8. Register Description 15.8.1. Control 15.8.2. Status 15.8.3. Generic Clock Control 15.8.4. Generic Clock Generator Control 15.8.5. Generic Clock Generator Division 16. PM – Power Manager 16.1. Overview 16.2. Features 16.3. Block Diagram 16.4. Signal Description 16.5. Product Dependencies 16.5.1. I/O Lines 16.5.2. Power Management 16.5.3. Clocks 16.5.3.1. Main Clock 16.5.3.2. CPU Clock 16.5.3.3. AHB Clock 16.5.3.4. APBx Clocks 16.5.4. DMA 16.5.5. Interrupts 16.5.6. Events 16.5.7. Debug Operation 16.5.8. Register Access Protection 16.5.9. Analog Connections 16.6. Functional Description 16.6.1. Principle of Operation 16.6.1.1. Synchronous Clocks 16.6.1.2. Reset Controller 16.6.1.3. Sleep Mode Controller 16.6.2. Basic Operation 16.6.2.1. Initialization 16.6.2.2. Enabling, Disabling and Resetting 16.6.2.3. Selecting the Main Clock Source 16.6.2.4. Selecting the Synchronous Clock Division Ratio 16.6.2.5. Clock Ready Flag 16.6.2.6. Peripheral Clock Masking 16.6.2.7. Reset Controller 16.6.2.8. Sleep Mode Controller 16.6.2.8.1. IDLE Mode 16.6.2.8.2. STANDBY Mode 16.6.3. SleepWalking 16.6.4. DMA Operation 16.6.5. Interrupts 16.6.6. Events 16.6.7. Sleep Mode Operation 16.7. Register Summary 16.8. Register Description 16.8.1. Control 16.8.2. Sleep Mode 16.8.3. CPU Clock Select 16.8.4. APBA Clock Select 16.8.5. APBB Clock Select 16.8.6. APBC Clock Select 16.8.7. AHB Mask 16.8.8. APBA Mask 16.8.9. APBB Mask 16.8.10. APBC Mask 16.8.11. Interrupt Enable Clear 16.8.12. Interrupt Enable Set 16.8.13. Interrupt Flag Status and Clear 16.8.14. Reset Cause 17. SYSCTRL – System Controller 17.1. Overview 17.2. Features 17.3. Block Diagram 17.4. Signal Description 17.5. Product Dependencies 17.5.1. I/O Lines 17.5.2. Power Management 17.5.3. Clocks 17.5.4. Interrupts 17.5.5. Debug Operation 17.5.6. Register Access Protection 17.5.7. Analog Connections 17.6. Functional Description 17.6.1. Principle of Operation 17.6.2. External Multipurpose Crystal Oscillator (XOSC) Operation 17.6.3. 32kHz External Crystal Oscillator (XOSC32K) Operation 17.6.4. 32kHz Internal Oscillator (OSC32K) Operation 17.6.5. 32kHz Ultra Low Power Internal Oscillator (OSCULP32K) Operation 17.6.6. 8MHz Internal Oscillator (OSC8M) Operation 17.6.7. Digital Frequency Locked Loop (DFLL48M) Operation 17.6.7.1. Basic Operation 17.6.7.1.1. Open-Loop Operation 17.6.7.1.2. Closed-Loop Operation 17.6.7.1.3. Frequency Locking 17.6.7.1.4. Frequency Error Measurement 17.6.7.1.5. Drift Compensation 17.6.7.1.6. Reference Clock Stop Detection 17.6.7.2. Additional Features 17.6.7.2.1. Dealing with Delay in the DFLL in Closed-Loop Mode 17.6.7.2.2. USB Clock Recovery Module 17.6.7.2.3. Wake from Sleep Modes 17.6.7.2.4. Accuracy 17.6.8. FDPLL96M – Fractional Digital Phase-Locked Loop Controller (DFLL96M) 17.6.8.1. Overview 17.6.8.2. Block Diagram 17.6.8.3. Principle of Operation 17.6.8.4. Initialization, Enabling, Disabling and Resetting 17.6.8.5. Reference Clock Switching 17.6.8.6. Loop Divider Ratio updates 17.6.8.7. Digital Filter Selection 17.6.9. 3.3V Brown-Out Detector Operation 17.6.9.1. 3.3V Brown-Out Detector (BOD33) 17.6.9.2. Continuous Mode 17.6.9.3. Sampling Mode 17.6.9.4. Hysteresis 17.6.10. Voltage Reference System Operation 17.6.10.1. User Control of the Voltage Reference System 17.6.11. Voltage Regulator System Operation 17.6.12. DMA Operation 17.6.13. Interrupts 17.6.14. Synchronization 17.7. Register Summary 17.8. Register Description 17.8.1. Interrupt Enable Clear 17.8.2. Interrupt Enable Set 17.8.3. Interrupt Flag Status and Clear 17.8.4. Power and Clocks Status 17.8.5. External Multipurpose Crystal Oscillator (XOSC) Control 17.8.6. 32kHz External Crystal Oscillator (XOSC32K) Control 17.8.7. 32kHz Internal Oscillator (OSC32K) Control 17.8.8. 32kHz Ultra Low Power Internal Oscillator (OSCULP32K) Control 17.8.9. 8MHz Internal Oscillator (OSC8M) Control 17.8.10. DFLL48M Control 17.8.11. DFLL48M Value 17.8.12. DFLL48M Multiplier 17.8.13. DFLL48M Synchronization 17.8.14. 3.3V Brown-Out Detector (BOD33) Control 17.8.15. Voltage Regulator System (VREG) Control 17.8.16. Voltage References System (VREF) Control 17.8.17. DPLL Control A 17.8.18. DPLL Ratio Control 17.8.19. DPLL Control B 17.8.20. DPLL Status 18. WDT – Watchdog Timer 18.1. Overview 18.2. Features 18.3. Block Diagram 18.4. Signal Description 18.5. Product Dependencies 18.5.1. I/O Lines 18.5.2. Power Management 18.5.3. Clocks 18.5.4. DMA 18.5.5. Interrupts 18.5.6. Events 18.5.7. Debug Operation 18.5.8. Register Access Protection 18.5.9. Analog Connections 18.6. Functional Description 18.6.1. Principle of Operation 18.6.2. Basic Operation 18.6.2.1. Initialization 18.6.2.2. Configurable Reset Values 18.6.2.3. Enabling and Disabling 18.6.2.4. Normal Mode 18.6.2.5. Window Mode 18.6.3. Additional Features 18.6.3.1. Always-On Mode 18.6.4. Interrupts 18.6.5. Synchronization 18.7. Register Summary 18.8. Register Description 18.8.1. Control 18.8.2. Configuration 18.8.3. Early Warning Interrupt Control 18.8.4. Interrupt Enable Clear 18.8.5. Interrupt Enable Set 18.8.6. Interrupt Flag Status and Clear 18.8.7. Status 18.8.8. Clear 19. RTC – Real-Time Counter 19.1. Overview 19.2. Features 19.3. Block Diagram 19.4. Signal Description 19.5. Product Dependencies 19.5.1. I/O Lines 19.5.2. Power Management 19.5.3. Clocks 19.5.4. DMA 19.5.5. Interrupts 19.5.6. Events 19.5.7. Debug Operation 19.5.8. Register Access Protection 19.5.9. Analog Connections 19.6. Functional Description 19.6.1. Principle of Operation 19.6.2. Basic Operation 19.6.2.1. Initialization 19.6.2.2. Enabling, Disabling and Resetting 19.6.3. Operating Modes 19.6.3.1. 32-Bit Counter (Mode 0) 19.6.3.2. 16-Bit Counter (Mode 1) 19.6.3.3. Clock/Calendar (Mode 2) 19.6.4. DMA Operation 19.6.5. Interrupts 19.6.6. Events 19.6.7. Sleep Mode Operation 19.6.8. Synchronization 19.6.9. Additional Features 19.6.9.1. Periodic Events 19.6.9.2. Frequency Correction 19.7. Register Summary 19.8. Register Description 19.8.1. Control - MODE0 19.8.2. Control - MODE1 19.8.3. Control - MODE2 19.8.4. Read Request 19.8.5. Event Control - MODE0 19.8.6. Event Control - MODE1 19.8.7. Event Control - MODE2 19.8.8. Interrupt Enable Clear - MODE0 19.8.9. Interrupt Enable Clear - MODE1 19.8.10. Interrupt Enable Clear - MODE2 19.8.11. Interrupt Enable Set - MODE0 19.8.12. Interrupt Enable Set - MODE1 19.8.13. Interrupt Enable Set - MODE2 19.8.14. Interrupt Flag Status and Clear - MODE0 19.8.15. Interrupt Flag Status and Clear - MODE1 19.8.16. Interrupt Flag Status and Clear - MODE2 19.8.17. Status 19.8.18. Debug Control 19.8.19. Frequency Correction 19.8.20. Counter Value - MODE0 19.8.21. Counter Value - MODE1 19.8.22. Clock Value - MODE2 19.8.23. Counter Period - MODE1 19.8.24. Compare n Value - MODE0 19.8.25. Compare n Value - MODE1 19.8.26. Alarm 0 Value - MODE2 19.8.27. Alarm n Mask - MODE2 20. DMAC – Direct Memory Access Controller 20.1. Overview 20.2. Features 20.3. Block Diagram 20.4. Signal Description 20.5. Product Dependencies 20.5.1. I/O Lines 20.5.2. Power Management 20.5.3. Clocks 20.5.4. DMA 20.5.5. Interrupts 20.5.6. Events 20.5.7. Debug Operation 20.5.8. Register Access Protection 20.5.9. Analog Connections 20.6. Functional Description 20.6.1. Principle of Operation 20.6.1.1. DMA 20.6.1.2. CRC 20.6.2. Basic Operation 20.6.2.1. Initialization 20.6.2.2. Enabling, Disabling, and Resetting 20.6.2.3. Transfer Descriptors 20.6.2.4. Arbitration 20.6.2.5. Data Transmission 20.6.2.6. Transfer Triggers and Actions 20.6.2.7. Addressing 20.6.2.8. Error Handling 20.6.3. Additional Features 20.6.3.1. Linked Descriptors 20.6.3.1.1. Adding Descriptor to the End of a List 20.6.3.1.2. Modifying a Descriptor in a List 20.6.3.1.3. Adding a Descriptor Between Existing Descriptors 20.6.3.2. Channel Suspend 20.6.3.3. Channel Resume and Next Suspend Skip 20.6.3.4. Event Input Actions 20.6.3.5. Event Output Selection 20.6.3.6. Aborting Transfers 20.6.3.7. CRC Operation 20.6.4. DMA Operation 20.6.5. Interrupts 20.6.6. Events 20.6.7. Sleep Mode Operation 20.6.8. Synchronization 20.7. Register Summary 20.8. Register Description 20.8.1. Control 20.8.2. CRC Control 20.8.3. CRC Data Input 20.8.4. CRC Checksum 20.8.5. CRC Status 20.8.6. Debug Control 20.8.7. Quality of Service Control 20.8.8. Software Trigger Control 20.8.9. Priority Control 0 20.8.10. Interrupt Pending 20.8.11. Interrupt Status 20.8.12. Busy Channels 20.8.13. Pending Channels 20.8.14. Active Channel and Levels 20.8.15. Descriptor Memory Section Base Address 20.8.16. Write-Back Memory Section Base Address 20.8.17. Channel ID 20.8.18. Channel Control A 20.8.19. Channel Control B 20.8.20. Channel Interrupt Enable Clear 20.8.21. Channel Interrupt Enable Set 20.8.22. Channel Interrupt Flag Status and Clear 20.8.23. Channel Status 20.9. Register Summary - SRAM 20.10. Register Description - SRAM 20.10.1. Block Transfer Control 20.10.2. Block Transfer Count 20.10.3. Block Transfer Source Address 20.10.4. Block Transfer Destination Address 20.10.5. Next Descriptor Address 21. EIC – External Interrupt Controller 21.1. Overview 21.2. Features 21.3. Block Diagram 21.4. Signal Description 21.5. Product Dependencies 21.5.1. I/O Lines 21.5.2. Power Management 21.5.3. Clocks 21.5.4. DMA 21.5.5. Interrupts 21.5.6. Events 21.5.7. Debug Operation 21.5.8. Register Access Protection 21.5.9. Analog Connections 21.6. Functional Description 21.6.1. Principle of Operation 21.6.2. Basic Operation 21.6.2.1. Initialization 21.6.2.2. Enabling, Disabling and Resetting 21.6.3. External Pin Processing 21.6.4. Additional Features 21.6.4.1. Non-Maskable Interrupt (NMI) 21.6.5. DMA Operation 21.6.6. Interrupts 21.6.7. Events 21.6.8. Sleep Mode Operation 21.6.9. Synchronization 21.7. Register Summary 21.8. Register Description 21.8.1. Control 21.8.2. Status 21.8.3. Non-Maskable Interrupt Control 21.8.4. Non-Maskable Interrupt Flag Status and Clear 21.8.5. Event Control 21.8.6. Interrupt Enable Clear 21.8.7. Interrupt Enable Set 21.8.8. Interrupt Flag Status and Clear 21.8.9. Wake-Up Enable 21.8.10. Configuration n 22. NVMCTRL – Non-Volatile Memory Controller 22.1. Overview 22.2. Features 22.3. Block Diagram 22.4. Signal Description 22.5. Product Dependencies 22.5.1. Power Management 22.5.2. Clocks 22.5.3. Interrupts 22.5.4. Debug Operation 22.5.5. Register Access Protection 22.5.6. Analog Connections 22.6. Functional Description 22.6.1. Principle of Operation 22.6.1.1. Initialization 22.6.2. Memory Organization 22.6.3. Region Lock Bits 22.6.4. Command and Data Interface 22.6.4.1. NVM Read 22.6.4.2. RWWEE Read 22.6.4.3. NVM Write 22.6.4.3.1. Procedure for Manual Page Writes (CTRLB.MANW=1) 22.6.4.3.2. Procedure for Automatic Page Writes (CTRLB.MANW=0) 22.6.4.4. Page Buffer Clear 22.6.4.5. Erase Row 22.6.4.5.1. Procedure for Erase Row 22.6.4.6. Lock and Unlock Region 22.6.4.7. Set and Clear Power Reduction Mode 22.6.5. NVM User Configuration 22.6.6. Security Bit 22.6.7. Cache 22.7. Register Summary 22.8. Register Description 22.8.1. Control A 22.8.2. Control B 22.8.3. NVM Parameter 22.8.4. Interrupt Enable Clear 22.8.5. Interrupt Enable Set 22.8.6. Interrupt Flag Status and Clear 22.8.7. Status 22.8.8. Address 22.8.9. Lock Section 23. PORT - I/O Pin Controller 23.1. Overview 23.2. Features 23.3. Block Diagram 23.4. Signal Description 23.5. Product Dependencies 23.5.1. I/O Lines 23.5.2. Power Management 23.5.3. Clocks 23.5.4. DMA 23.5.5. Interrupts 23.5.6. Events 23.5.7. Debug Operation 23.5.8. Register Access Protection 23.5.9. Analog Connections 23.5.10. CPU Local Bus 23.6. Functional Description 23.6.1. Principle of Operation 23.6.2. Basic Operation 23.6.2.1. Initialization 23.6.2.2. Operation 23.6.3. I/O Pin Configuration 23.6.3.1. Pin Configurations Summary 23.6.3.2. Input Configuration 23.6.3.3. Totem-Pole Output 23.6.3.4. Digital Functionality Disabled 23.6.4. PORT Access Priority 23.7. Register Summary 23.8. Register Description 23.8.1. Data Direction 23.8.2. Data Direction Clear 23.8.3. Data Direction Set 23.8.4. Data Direction Toggle 23.8.5. Data Output Value 23.8.6. Data Output Value Clear 23.8.7. Data Output Value Set 23.8.8. Data Output Value Toggle 23.8.9. Data Input Value 23.8.10. Control 23.8.11. Write Configuration 23.8.12. Peripheral Multiplexing n 23.8.13. Pin Configuration 24. EVSYS – Event System 24.1. Overview 24.2. Features 24.3. Block Diagram 24.4. Signal Description 24.5. Product Dependencies 24.5.1. I/O Lines 24.5.2. Power Management 24.5.3. Clocks 24.5.4. DMA 24.5.5. Interrupts 24.5.6. Events 24.5.7. Debug Operation 24.5.8. Register Access Protection 24.5.9. Analog Connections 24.6. Functional Description 24.6.1. Principle of Operation 24.6.2. Basic Operation 24.6.2.1. Initialization 24.6.2.2. Enabling, Disabling and Resetting 24.6.2.3. User Multiplexer Setup 24.6.2.4. Channel Setup 24.6.2.5. Channel Path 24.6.2.5.1. Asynchronous Path 24.6.2.5.2. Synchronous Path 24.6.2.5.3. Resynchronized Path 24.6.2.6. Edge Detection 24.6.2.7. Event Generators 24.6.2.8. Channel Status 24.6.2.9. Software Event 24.6.3. Interrupts 24.6.3.1. The Overrun Channel n Interrupt 24.6.3.2. The Event Detected Channel n Interrupt 24.6.4. Sleep Mode Operation 24.7. Register Summary 24.8. Register Description 24.8.1. Control 24.8.2. Channel 24.8.3. User Multiplexer 24.8.4. Channel Status 24.8.5. Interrupt Enable Clear 24.8.6. Interrupt Enable Set 24.8.7. Interrupt Flag Status and Clear 25. SERCOM – Serial Communication Interface 25.1. Overview 25.2. Features 25.3. Block Diagram 25.4. Signal Description 25.5. Product Dependencies 25.5.1. I/O Lines 25.5.2. Power Management 25.5.3. Clocks 25.5.4. DMA 25.5.5. Interrupts 25.5.6. Events 25.5.7. Debug Operation 25.5.8. Register Access Protection 25.5.9. Analog Connections 25.6. Functional Description 25.6.1. Principle of Operation 25.6.2. Basic Operation 25.6.2.1. Initialization 25.6.2.2. Enabling, Disabling, and Resetting 25.6.2.3. Clock Generation – Baud-Rate Generator 25.6.2.3.1. Asynchronous Arithmetic Mode BAUD Value Selection 25.6.3. Additional Features 25.6.3.1. Address Match and Mask 25.6.3.1.1. Address With Mask 25.6.3.1.2. Two Unique Addresses 25.6.3.1.3. Address Range 25.6.4. DMA Operation 25.6.5. Interrupts 25.6.6. Events 25.6.7. Sleep Mode Operation 25.6.8. Synchronization 26. SERCOM USART – SERCOM Universal Synchronous and Asynchronous Receiver and Transmitter 26.1. Overview 26.2. USART Features 26.3. Block Diagram 26.4. Signal Description 26.5. Product Dependencies 26.5.1. I/O Lines 26.5.2. Power Management 26.5.3. Clocks 26.5.4. DMA 26.5.5. Interrupts 26.5.6. Events 26.5.7. Debug Operation 26.5.8. Register Access Protection 26.5.9. Analog Connections 26.6. Functional Description 26.6.1. Principle of Operation 26.6.2. Basic Operation 26.6.2.1. Initialization 26.6.2.2. Enabling, Disabling, and Resetting 26.6.2.3. Clock Generation and Selection 26.6.2.3.1. Synchronous Clock Operation 26.6.2.4. Data Register 26.6.2.5. Data Transmission 26.6.2.5.1. Disabling the Transmitter 26.6.2.6. Data Reception 26.6.2.6.1. Disabling the Receiver 26.6.2.6.2. Error Bits 26.6.2.6.3. Asynchronous Data Reception 26.6.2.6.4. Asynchronous Operational Range 26.6.3. Additional Features 26.6.3.1. Parity 26.6.3.2. Hardware Handshaking 26.6.3.3. IrDA Modulation and Demodulation 26.6.3.4. Break Character Detection and Auto-Baud 26.6.3.5. Collision Detection 26.6.3.6. Loop-Back Mode 26.6.3.7. Start-of-Frame Detection 26.6.3.8. Sample Adjustment 26.6.4. DMA, Interrupts and Events 26.6.4.1. DMA Operation 26.6.4.2. Interrupts 26.6.4.3. Events 26.6.5. Sleep Mode Operation 26.6.6. Synchronization 26.7. Register Summary 26.8. Register Description 26.8.1. Control A 26.8.2. Control B 26.8.3. Baud 26.8.4. Receive Pulse Length Register 26.8.5. Interrupt Enable Clear 26.8.6. Interrupt Enable Set 26.8.7. Interrupt Flag Status and Clear 26.8.8. Status 26.8.9. Synchronization Busy 26.8.10. Data 26.8.11. Debug Control 27. SERCOM SPI – SERCOM Serial Peripheral Interface 27.1. Overview 27.2. Features 27.3. Block Diagram 27.4. Signal Description 27.5. Product Dependencies 27.5.1. I/O Lines 27.5.2. Power Management 27.5.3. Clocks 27.5.4. DMA 27.5.5. Interrupts 27.5.6. Events 27.5.7. Debug Operation 27.5.8. Register Access Protection 27.5.9. Analog Connections 27.6. Functional Description 27.6.1. Principle of Operation 27.6.2. Basic Operation 27.6.2.1. Initialization 27.6.2.2. Enabling, Disabling, and Resetting 27.6.2.3. Clock Generation 27.6.2.4. Data Register 27.6.2.5. SPI Transfer Modes 27.6.2.6. Transferring Data 27.6.2.6.1. Master 27.6.2.6.2. Slave 27.6.2.7. Receiver Error Bit 27.6.3. Additional Features 27.6.3.1. Address Recognition 27.6.3.2. Preloading of the Slave Shift Register 27.6.3.3. Master with Several Slaves 27.6.3.4. Loop-Back Mode 27.6.3.5. Hardware Controlled SS 27.6.3.6. Slave Select Low Detection 27.6.4. DMA, Interrupts, and Events 27.6.4.1. DMA Operation 27.6.4.2. Interrupts 27.6.4.3. Events 27.6.5. Sleep Mode Operation 27.6.6. Synchronization 27.7. Register Summary 27.8. Register Description 27.8.1. Control A 27.8.2. Control B 27.8.3. Baud Rate 27.8.4. Interrupt Enable Clear 27.8.5. Interrupt Enable Set 27.8.6. Interrupt Flag Status and Clear 27.8.7. Status 27.8.8. Synchronization Busy 27.8.9. Address 27.8.10. Data 27.8.11. Debug Control 28. SERCOM I2C – SERCOM Inter-Integrated Circuit 28.1. Overview 28.2. Features 28.3. Block Diagram 28.4. Signal Description 28.5. Product Dependencies 28.5.1. I/O Lines 28.5.2. Power Management 28.5.3. Clocks 28.5.4. DMA 28.5.5. Interrupts 28.5.6. Events 28.5.7. Debug Operation 28.5.8. Register Access Protection 28.5.9. Analog Connections 28.6. Functional Description 28.6.1. Principle of Operation 28.6.2. Basic Operation 28.6.2.1. Initialization 28.6.2.2. Enabling, Disabling, and Resetting 28.6.2.3. I2C Bus State Logic 28.6.2.4. I2C Master Operation 28.6.2.4.1. Master Clock Generation 28.6.2.4.1.1. Clock Generation (Standard-Mode, Fast-Mode, and Fast-Mode Plus) 28.6.2.4.1.2. Master Clock Generation (High-Speed Mode) 28.6.2.4.2. Transmitting Address Packets 28.6.2.4.3. Transmitting Data Packets 28.6.2.4.4. Receiving Data Packets (SCLSM=0) 28.6.2.4.5. Receiving Data Packets (SCLSM=1) 28.6.2.4.6. High-Speed Mode 28.6.2.4.7. 10-Bit Addressing 28.6.2.5. I2C Slave Operation 28.6.2.5.1. Receiving Address Packets (SCLSM=0) 28.6.2.5.2. Receiving Address Packets (SCLSM=1) 28.6.2.5.3. Receiving and Transmitting Data Packets 28.6.2.5.4. High-Speed Mode 28.6.2.5.5. 10-Bit Addressing 28.6.2.5.6. PMBus Group Command 28.6.3. Additional Features 28.6.3.1. SMBus 28.6.3.2. Smart Mode 28.6.3.3. 4-Wire Mode 28.6.3.4. Quick Command 28.6.4. DMA, Interrupts and Events 28.6.4.1. DMA Operation 28.6.4.1.1. Slave DMA 28.6.4.1.2. Master DMA 28.6.4.2. Interrupts 28.6.4.3. Events 28.6.5. Sleep Mode Operation 28.6.6. Synchronization 28.7. Register Summary - I2C Slave 28.8. Register Description - I2C Slave 28.8.1. Control A 28.8.2. Control B 28.8.3. Interrupt Enable Clear 28.8.4. Interrupt Enable Set 28.8.5. Interrupt Flag Status and Clear 28.8.6. Status 28.8.7. Synchronization Busy 28.8.8. Address 28.8.9. Data 28.9. Register Summary - I2C Master 28.10. Register Description - I2C Master 28.10.1. Control A 28.10.2. Control B 28.10.3. Baud Rate 28.10.4. Interrupt Enable Clear 28.10.5. Interrupt Enable Clear 28.10.6. Interrupt Flag Status and Clear 28.10.7. Status 28.10.8. Synchronization Busy 28.10.9. Address 28.10.10. Data 28.10.11. Debug Control 29. I2S - Inter-IC Sound Controller 29.1. Overview 29.2. Features 29.3. Block Diagram 29.4. Signal Description 29.5. Product Dependencies 29.5.1. I/O Lines 29.5.2. Power Management 29.5.3. Clocks 29.5.4. DMA 29.5.5. Interrupts 29.5.6. Events 29.5.7. Debug Operation 29.5.8. Register Access Protection 29.5.9. Analog Connections 29.6. Functional Description 29.6.1. Principle of Operation 29.6.1.1. Initialization 29.6.2. Basic Operation 29.6.2.1. Master Clock, Serial Clock, and Frame Sync Generation 29.6.2.1.1. Slave Mode 29.6.2.1.2. Master Mode and Controller Mode 29.6.2.1.3. MCKn Clock Frequency 29.6.2.1.4. SCKn Clock Frequency 29.6.2.1.5. Relation Between MCKn, SCKn, and Sampling Frequency fs 29.6.2.2. Data Holding Registers 29.6.2.2.1. Data Reception Mode 29.6.2.2.2. Data Transmission Mode 29.6.3. Master, Controller, and Slave Modes 29.6.4. I2S Format - Reception and Transmission Sequence with Word Select 29.6.5. TDM Format - Reception and Transmission Sequence 29.6.6. PDM Reception 29.6.7. Data Formatting Unit 29.6.8. DMA, Interrupts and Events 29.6.8.1. DMA Operation 29.6.8.2. Interrupts 29.6.8.3. Events 29.6.9. Sleep Mode Operation 29.6.10. Synchronization 29.6.11. Loop-Back Mode 29.7. I2S Application Examples 29.8. Register Summary 29.9. Register Description 29.9.1. Control A 29.9.2. Clock Unit n Control 29.9.3. Interrupt Enable Clear 29.9.4. Interrupt Enable Set 29.9.5. Interrupt Flag Status and Clear 29.9.6. Synchronization Busy 29.9.7. Serializer n Control 29.9.8. Data Holding m 29.9.9. Rx Data 30. TC – Timer/Counter 30.1. Overview 30.2. Features 30.3. Block Diagram 30.4. Signal Description 30.5. Product Dependencies 30.5.1. I/O Lines 30.5.2. Power Management 30.5.3. Clocks 30.5.4. DMA 30.5.5. Interrupts 30.5.6. Events 30.5.7. Debug Operation 30.5.8. Register Access Protection 30.5.9. Analog Connections 30.6. Functional Description 30.6.1. Principle of Operation 30.6.2. Basic Operation 30.6.2.1. Initialization 30.6.2.2. Enabling, Disabling and Resetting 30.6.2.3. Prescaler Selection 30.6.2.4. Counter Mode 30.6.2.5. Counter Operations 30.6.2.5.1. Stop Command and Event Action 30.6.2.5.2. Re-Trigger Command and Event Action 30.6.2.5.3. Count Event Action 30.6.2.5.4. Start Event Action 30.6.2.6. Compare Operations 30.6.2.6.1. Waveform Output Operations 30.6.2.6.2. Frequency Operation 30.6.2.6.3. PWM Operation 30.6.2.6.4. Changing the Top Value 30.6.2.7. Capture Operations 30.6.2.7.1. Event Capture Action 30.6.2.7.2. Period and Pulse-Width (PPW) Capture Action 30.6.3. Additional Features 30.6.3.1. One-Shot Operation 30.6.4. DMA, Interrupts and Events 30.6.4.1. DMA Operation 30.6.4.2. Interrupts 30.6.4.3. Events 30.6.5. Sleep Mode Operation 30.6.6. Synchronization 30.7. Register Summary 30.8. Register Description 30.8.1. Control A 30.8.2. Read Request 30.8.3. Control B Clear 30.8.4. Control B Set 30.8.5. Control C 30.8.6. Debug Control 30.8.7. Event Control 30.8.8. Interrupt Enable Clear 30.8.9. Interrupt Enable Set 30.8.10. Interrupt Flag Status and Clear 30.8.11. Status 30.8.12. Counter Value 30.8.12.1. Counter Value, 8-bit Mode 30.8.12.2. Counter Value, 16-bit Mode 30.8.12.3. Counter Value, 32-bit Mode 30.8.13. Period Value 30.8.13.1. Period Value, 8-bit Mode 30.8.14. Compare/Capture 30.8.14.1. Channel x Compare/Capture Value, 8-bit Mode 30.8.14.2. Channel x Compare/Capture Value, 16-bit Mode 30.8.14.3. Channel x Compare/Capture Value, 32-bit Mode 31. TCC – Timer/Counter for Control Applications 31.1. Overview 31.2. Features 31.3. Block Diagram 31.4. Signal Description 31.5. Product Dependencies 31.5.1. I/O Lines 31.5.2. Power Management 31.5.3. Clocks 31.5.4. DMA 31.5.5. Interrupts 31.5.6. Events 31.5.7. Debug Operation 31.5.8. Register Access Protection 31.5.9. Analog Connections 31.6. Functional Description 31.6.1. Principle of Operation 31.6.2. Basic Operation 31.6.2.1. Initialization 31.6.2.2. Enabling, Disabling, and Resetting 31.6.2.3. Prescaler Selection 31.6.2.4. Counter Operation 31.6.2.5. Compare Operations 31.6.2.5.1. Waveform Output Generation Operations 31.6.2.5.2. Normal Frequency (NFRQ) 31.6.2.5.3. Match Frequency (MFRQ) 31.6.2.5.4. Normal Pulse-Width Modulation (NPWM) 31.6.2.5.5. Single-Slope PWM Operation 31.6.2.5.6. Dual-Slope PWM Generation 31.6.2.5.7. Dual-Slope Critical PWM Generation 31.6.2.5.8. Output Polarity 31.6.2.6. Double Buffering 31.6.2.7. Capture Operations 31.6.3. Additional Features 31.6.3.1. One-Shot Operation 31.6.3.2. Circular Buffer 31.6.3.3. Dithering Operation 31.6.3.4. Ramp Operations 31.6.3.5. Recoverable Faults 31.6.3.6. Non-Recoverable Faults 31.6.3.7. Waveform Extension 31.6.4. DMA, Interrupts, and Events 31.6.4.1. DMA Operation 31.6.4.2. Interrupts 31.6.4.3. Events 31.6.5. Sleep Mode Operation 31.6.6. Synchronization 31.7. Register Summary 31.8. Register Description 31.8.1. Control A 31.8.2. Control B Clear 31.8.3. Control B Set 31.8.4. Synchronization Busy 31.8.5. Fault Control A and B 31.8.6. Waveform Extension Control 31.8.7. Driver Control 31.8.8. Debug control 31.8.9. Event Control 31.8.10. Interrupt Enable Clear 31.8.11. Interrupt Enable Set 31.8.12. Interrupt Flag Status and Clear 31.8.13. Status 31.8.14. Counter Value 31.8.15. Pattern 31.8.16. Waveform 31.8.17. Period Value 31.8.18. Compare/Capture Channel x 31.8.19. Pattern Buffer 31.8.20. Waveform Buffer 31.8.21. Period Buffer Value 31.8.22. Channel x Compare/Capture Buffer Value 32. USB – Universal Serial Bus 32.1. Overview 32.2. Features 32.3. USB Block Diagram 32.4. Signal Description 32.5. Product Dependencies 32.5.1. I/O Lines 32.5.2. Power Management 32.5.3. Clocks 32.5.4. DMA 32.5.5. Interrupts 32.5.6. Events 32.5.7. Debug Operation 32.5.8. Register Access Protection 32.5.9. Analog Connections 32.5.10. Calibration 32.6. Functional Description 32.6.1. USB General Operation 32.6.1.1. Initialization 32.6.2. USB Device Operations 32.6.2.1. Initialization 32.6.2.2. Endpoint Configuration 32.6.2.3. Multi-Packet Transfers 32.6.2.4. USB Reset 32.6.2.5. Start-of-Frame 32.6.2.6. Management of SETUP Transactions 32.6.2.7. Management of OUT Transactions 32.6.2.8. Multi-Packet Transfers for OUT Endpoint 32.6.2.9. Management of IN Transactions 32.6.2.10. Multi-Packet Transfers for IN Endpoint 32.6.2.11. Ping-Pong Operation 32.6.2.12. Feedback Operation 32.6.2.13. Suspend State and Pad Behavior 32.6.2.14. Remote Wakeup 32.6.2.15. Link Power Management L1 (LPM-L1) Suspend State Entry and Exit as Device 32.6.2.16. USB Device Interrupt 32.6.3. Host Operations 32.6.3.1. Device Detection and Disconnection 32.6.3.2. Host Terminology 32.6.3.3. USB Reset 32.6.3.4. Pipe Configuration 32.6.3.5. Pipe Activation 32.6.3.6. Pipe Address Setup 32.6.3.7. Suspend and Wakeup 32.6.3.8. Phase-locked SOFs 32.6.3.9. Management of Control Pipes 32.6.3.10. Management of IN Pipes 32.6.3.11. Management of OUT Pipes 32.6.3.12. Alternate Pipe 32.6.3.13. Data Flow Error 32.6.3.14. CRC Error 32.6.3.15. PERR Error 32.6.3.16. Link Power Management L1 (LPM-L1) Suspend State Entry and Exit as Host. 32.6.3.17. Host Interrupt 32.7. Register Summary 32.7.1. Common Device Summary 32.7.2. Device Summary 32.7.3. Host Summary 32.8. Register Description 32.8.1. Communication Device Host Registers 32.8.1.1. Control A 32.8.1.2. Synchronization Busy 32.8.1.3. QOS Control 32.8.1.4. Finite State Machine Status 32.8.1.5. Descriptor Address 32.8.1.6. Pad Calibration 32.8.2. Device Registers - Common 32.8.2.1. Control B 32.8.2.2. Device Address 32.8.2.3. Status 32.8.2.4. Device Frame Number 32.8.2.5. Device Interrupt Enable Clear 32.8.2.6. Device Interrupt Enable Set 32.8.2.7. Device Interrupt Flag Status and Clear 32.8.2.8. Endpoint Interrupt Summary 32.8.3. Device Registers - Endpoint 32.8.3.1. Device Endpoint Configuration register n 32.8.3.2. EndPoint Status Clear n 32.8.3.3. EndPoint Status Set n 32.8.3.4. EndPoint Status n 32.8.3.5. Device EndPoint Interrupt Flag n 32.8.3.6. Device EndPoint Interrupt Enable n 32.8.3.7. Device Interrupt EndPoint Set n 32.8.4. Device Registers - Endpoint RAM 32.8.4.1. Endpoint Descriptor Structure 32.8.4.2. Address of Data Buffer 32.8.4.3. Packet Size 32.8.4.4. Extended Register 32.8.4.5. Device Status Bank 32.8.5. Host Registers - Common 32.8.5.1. Control B 32.8.5.2. Host Start-of-Frame Control 32.8.5.3. Status 32.8.5.4. Host Frame Number 32.8.5.5. Host Frame Length 32.8.5.6. Host Interrupt Enable Register Clear 32.8.5.7. Host Interrupt Enable Register Set 32.8.5.8. Host Interrupt Flag Status and Clear 32.8.5.9. Pipe Interrupt Summary 32.8.6. Host Registers - Pipe 32.8.6.1. Host Pipe n Configuration 32.8.6.2. Interval for the Bulk-Out/Ping Transaction 32.8.6.3. Pipe Status Clear n 32.8.6.4. Pipe Status Set Register n 32.8.6.5. Pipe Status Register n 32.8.6.6. Host Pipe Interrupt Flag Register 32.8.6.7. Host Pipe Interrupt Clear Register 32.8.6.8. Host Interrupt Pipe Set Register 32.8.7. Host Registers - Pipe RAM 32.8.7.1. Pipe Descriptor Structure 32.8.7.2. Address of the Data Buffer 32.8.7.3. Packet Size 32.8.7.4. Extended Register 32.8.7.5. Host Status Bank 32.8.7.6. Host Control Pipe 32.8.7.7. Host Status Pipe 33. ADC – Analog-to-Digital Converter 33.1. Overview 33.2. Features 33.3. Block Diagram 33.4. Signal Description 33.5. Product Dependencies 33.5.1. I/O Lines 33.5.2. Power Management 33.5.3. Clocks 33.5.4. DMA 33.5.5. Interrupts 33.5.6. Events 33.5.7. Debug Operation 33.5.8. Register Access Protection 33.5.9. Analog Connections 33.5.10. Calibration 33.6. Functional Description 33.6.1. Principle of Operation 33.6.2. Basic Operation 33.6.2.1. Initialization 33.6.2.2. Enabling, Disabling and Reset 33.6.2.3. Operation 33.6.3. Prescaler 33.6.4. ADC Resolution 33.6.5. Differential and Single-Ended Conversions 33.6.5.1. Conversion Timing 33.6.6. Accumulation 33.6.7. Averaging 33.6.8. Oversampling and Decimation 33.6.9. Window Monitor 33.6.10. Offset and Gain Correction 33.6.11. DMA Operation 33.6.12. Interrupts 33.6.13. Events 33.6.14. Sleep Mode Operation 33.6.15. Synchronization 33.7. Register Summary 33.8. Register Description 33.8.1. Control A 33.8.2. Reference Control 33.8.3. Average Control 33.8.4. Sampling Time Control 33.8.5. Control B 33.8.6. Window Monitor Control 33.8.7. Software Trigger 33.8.8. Input Control 33.8.9. Event Control 33.8.10. Interrupt Enable Clear 33.8.11. Interrupt Enable Set 33.8.12. Interrupt Flag Status and Clear 33.8.13. Status 33.8.14. Result 33.8.15. Window Monitor Lower Threshold 33.8.16. Window Monitor Upper Threshold 33.8.17. Gain Correction 33.8.18. Offset Correction 33.8.19. Calibration 33.8.20. Debug Control 34. AC – Analog Comparators 34.1. Overview 34.2. Features 34.3. Block Diagram 34.4. Signal Description 34.5. Product Dependencies 34.5.1. I/O Lines 34.5.2. Power Management 34.5.3. Clocks 34.5.4. DMA 34.5.5. Interrupts 34.5.6. Events 34.5.7. Debug Operation 34.5.8. Register Access Protection 34.5.9. Analog Connections 34.6. Functional Description 34.6.1. Principle of Operation 34.6.2. Basic Operation 34.6.2.1. Initialization 34.6.2.2. Enabling, Disabling and Resetting 34.6.2.3. Comparator Configuration 34.6.2.4. Starting a Comparison 34.6.2.4.1. Continuous Measurement 34.6.2.4.2. Single-Shot 34.6.3. Selecting Comparator Inputs 34.6.4. Window Operation 34.6.5. Voltage Doubler 34.6.6. VDDANA Scaler 34.6.7. Input Hysteresis 34.6.8. Propagation Delay vs. Power Consumption 34.6.9. Filtering 34.6.10. Comparator Output 34.6.11. Offset Compensation 34.6.12. Interrupts 34.6.13. Events 34.6.14. Sleep Mode Operation 34.6.14.1. Continuous Measurement during Sleep 34.6.14.2. Single-Shot Measurement during Sleep 34.6.15. Synchronization 34.7. Register Summary 34.8. Register Description 34.8.1. Control A 34.8.2. Control B 34.8.3. Event Control 34.8.4. Interrupt Enable Clear 34.8.5. Interrupt Enable Set 34.8.6. Interrupt Flag Status and Clear 34.8.7. Status A 34.8.8. Status B 34.8.9. Status A 34.8.10. Window Control 34.8.11. Comparator Control n 34.8.12. Scaler n 35. DAC – Digital-to-Analog Converter 35.1. Overview 35.2. Features 35.3. Block Diagram 35.4. Signal Description 35.5. Product Dependencies 35.5.1. I/O Lines 35.5.2. Power Management 35.5.3. Clocks 35.5.4. DMA 35.5.5. Interrupts 35.5.6. Events 35.5.7. Debug Operation 35.5.8. Register Access Protection 35.5.9. Analog Connections 35.6. Functional Description 35.6.1. Principle of Operation 35.6.2. Basic Operation 35.6.2.1. Initialization 35.6.2.2. Enabling, Disabling and Resetting 35.6.2.3. Enabling the Output Buffer 35.6.2.4. Digital to Analog Conversion 35.6.3. DMA Operation 35.6.4. Interrupts 35.6.5. Events 35.6.6. Sleep Mode Operation 35.6.7. Synchronization 35.6.8. Additional Features 35.6.8.1. DAC as an Internal Reference 35.6.8.2. Data Buffer 35.6.8.3. Voltage Pump 35.7. Register Summary 35.8. Register Description 35.8.1. Control A 35.8.2. Control B 35.8.3. Event Control 35.8.4. Interrupt Enable Clear 35.8.5. Interrupt Enable Set 35.8.6. Interrupt Flag Status and Clear 35.8.7. Status 35.8.8. Data DAC 35.8.9. Data Buffer 36. PTC - Peripheral Touch Controller 36.1. Overview 36.2. Features 36.3. Block Diagram 36.4. Signal Description 36.5. Product Dependencies 36.5.1. I/O Lines 36.5.1.1. Mutual-capacitance Sensor Arrangement 36.5.1.2. Self-capacitance Sensor Arrangement 36.5.2. Clocks 36.6. Functional Description 37. Electrical Characteristics 37.1. Disclaimer 37.2. Absolute Maximum Ratings 37.3. General Operating Ratings 37.4. Supply Characteristics 37.5. Maximum Clock Frequencies 37.6. Power Consumption 37.7. Peripheral Power Consumption 37.7.1. All peripheral except USB 37.7.2. USB Peripheral Power Consumption 37.8. I/O Pin Characteristics 37.8.1. Normal I/O Pins 37.8.2. I2C Pins 37.8.3. XOSC Pin 37.8.4. XOSC32 Pin 37.8.5. External Reset Pin 37.9. Injection Current 37.10. Analog Characteristics 37.10.1. Voltage Regulator Characteristics 37.10.2. Power-On Reset (POR) Characteristics 37.10.3. Brown-Out Detectors Characteristics 37.10.3.1. BOD33 37.10.4. Analog-to-Digital (ADC) characteristics 37.10.4.1. Performance with the Averaging Digital Feature 37.10.4.2. Performance with the hardware offset and gain correction 37.10.4.3. Inputs and Sample and Hold Acquisition Times 37.10.5. Digital to Analog Converter (DAC) Characteristics 37.10.6. Analog Comparator Characteristics 37.10.7. Internal 1.1V Bandgap Reference Characteristics 37.10.8. Temperature Sensor Characteristics 37.10.8.1. Temperature Sensor Characteristics 37.10.8.2. Software-based Refinement of the Actual Temperature 37.10.8.2.1. Temperature Log Row 37.10.8.2.2. Using Linear Interpolation 37.11. NVM Characteristics 37.12. Oscillators Characteristics 37.12.1. Crystal Oscillator (XOSC) Characteristics 37.12.1.1. Digital Clock Characteristics 37.12.1.2. Crystal Oscillator Characteristics 37.12.2. External 32 kHz Crystal Oscillator (XOSC32K) Characteristics 37.12.2.1. Digital Clock Characteristics 37.12.2.1.1. Crystal Oscillator Characteristics 37.12.3. Digital Frequency Locked Loop (DFLL48M) Characteristics 37.12.4. 32.768kHz Internal oscillator (OSC32K) Characteristics 37.12.5. Ultra Low Power Internal 32kHz RC Oscillator (OSCULP32K) Characteristics 37.12.6. 8MHz RC Oscillator (OSC8M) Characteristics 37.12.7. Fractional Digital Phase Locked Loop (FDPLL96M) Characteristics 37.13. PTC Typical Characteristics 37.13.1. Device Variant A 37.13.2. Device Variant B and C 37.14. USB Characteristics 37.15. Timing Characteristics 37.15.1. External Reset 37.15.2. SERCOM in SPI Mode Timing 37.15.3. SERCOM in I2C Mode Timing 37.15.4. SWD Timing 37.15.5. I2S Timing 38. Packaging Information 38.1. Thermal Considerations 38.1.1. Thermal Resistance Data 38.1.2. Junction Temperature 38.2. Package Drawings 38.2.1. 64 pin TQFP 38.2.2. 64 pin QFN 38.2.3. 64-ball UFBGA 38.2.4. 48 pin TQFP 38.2.5. 48 pin QFN 38.2.6. 45-ball WLCSP 38.2.7. 32 pin TQFP 38.2.8. 32 pin QFN 38.2.9. 35 ball WLCSP (Device Variant B) 38.2.10. 35 ball WLCSP (Device Variant C) 38.3. Soldering Profile 39. Schematic Checklist 39.1. Introduction 39.1.1. Operation in Noisy Environment 39.2. Power Supply 39.2.1. Power Supply Connections 39.3. External Analog Reference Connections 39.4. External Reset Circuit 39.5. Clocks and Crystal Oscillators 39.5.1. External Clock Source 39.5.2. Crystal Oscillator 39.5.3. External Real Time Oscillator 39.5.4. Calculating the Correct Crystal Decoupling Capacitor 39.6. Unused or Unconnected Pins 39.7. Programming and Debug Ports 39.7.1. Cortex Debug Connector (10-pin) 39.7.2. 10-pin JTAGICE3 Compatible Serial Wire Debug Interface 39.7.3. 20-pin IDC JTAG Connector 39.8. USB Interface 40. Errata 40.1. Device Variant A 40.1.1. Die Revision A 40.1.1.1. Device 40.1.1.2. DSU 40.1.1.3. PM 40.1.1.4. DFLL48M 40.1.1.5. XOSC32K 40.1.1.6. FDPLL 40.1.1.7. DMAC 40.1.1.8. EIC 40.1.1.9. NVMCTRL 40.1.1.10. SERCOM 40.1.1.11. TC 40.1.1.12. TCC 40.1.1.13. USB 40.1.1.14. PTC 40.1.2. Die Revision B 40.1.2.1. Device 40.1.2.2. DSU 40.1.2.3. PM 40.1.2.4. DFLL48M 40.1.2.5. XOSC32K 40.1.2.6. FDPLL 40.1.2.7. DMAC 40.1.2.8. EIC 40.1.2.9. NVMCTRL 40.1.2.10. SERCOM 40.1.2.11. TC 40.1.2.12. TCC 40.1.2.13. PTC 40.1.3. Die Revision C 40.1.3.1. Device 40.1.3.2. DSU 40.1.3.3. PM 40.1.3.4. DFLL48M 40.1.3.5. XOSC32K 40.1.3.6. FDPLL 40.1.3.7. DMAC 40.1.3.8. EIC 40.1.3.9. NVMCTRL 40.1.3.10. I2S 40.1.3.11. SERCOM 40.1.3.12. TC 40.1.3.13. TCC 40.1.3.14. PTC 40.1.4. Die Revision D 40.1.4.1. Device 40.1.4.2. DSU 40.1.4.3. PM 40.1.4.4. DFLL48M 40.1.4.5. XOSC32K 40.1.4.6. FDPLL 40.1.4.7. DMAC 40.1.4.8. EIC 40.1.4.9. NVMCTRL 40.1.4.10. I2S 40.1.4.11. SERCOM 40.1.4.12. TC 40.1.4.13. TCC 40.1.4.14. PTC 40.2. Device Variant B 40.2.1. Die Revision E 40.2.1.1. Device 40.2.1.2. DSU 40.2.1.3. DFLL48M 40.2.1.4. FDPLL 40.2.1.5. DMAC 40.2.1.6. EIC 40.2.1.7. NVMCTRL 40.2.1.8. I2S 40.2.1.9. SERCOM 40.2.1.10. TCC 40.2.2. Die Revision F 40.2.2.1. Device 40.2.2.2. DSU 40.2.2.3. DFLL48M 40.2.2.4. FDPLL 40.2.2.5. DMAC 40.2.2.6. EIC 40.2.2.7. NVMCTRL 40.2.2.8. I2S 40.2.2.9. SERCOM 40.2.2.10. TCC 40.3. Device Variant C 40.3.1. Die Revision F 40.3.1.1. Device 40.3.1.2. DSU 40.3.1.3. DFLL48M 40.3.1.4. FDPLL 40.3.1.5. DMAC 40.3.1.6. EIC 40.3.1.7. NVMCTRL 40.3.1.8. I2S 40.3.1.9. SERCOM 40.3.1.10. TCC 41. Conventions 41.1. Numerical Notation 41.2. Memory Size and Type 41.3. Frequency and Time 41.4. Registers and Bits 42. Acronyms and Abbreviations 43. Datasheet Revision History 43.1. Rev. A – 01/2017 43.2. Rev. O – 12/2016 43.3. Rev. N – 10/2016 43.4. Rev. M – 09/2016 43.5. Rev. L – 09/2016 43.6. Rev. K – 09/2016 43.7. Rev. J – 07/2016 43.8. Rev. I – 03/2016 43.9. Rev. H – 01/2016 43.10. Rev. G – 09/2015 43.11. Rev. F – 07/2015 43.12. Rev. E – 02/2015 43.13. Rev. D – 09/2014 43.14. Rev. C – 07/2014 43.15. Rev. B – 07/2014 43.16. Rev. A - 02/2014 44. Appendix A. Electrical Characteristics at 125°C 44.1. Disclaimer 44.2. Absolute Maximum Ratings 44.3. General Operating Ratings 44.4. Maximum Clock Frequencies 44.5. Power Consumption 44.6. Analog Characteristics 44.6.1. Power-On Reset (POR) Characteristics 44.6.2. Brown-Out Detectors Characteristics 44.6.2.1. BOD33 44.6.3. Analog-to-Digital (ADC) characteristics 44.6.4. Inputs and Sample and Hold Acquisition Times 44.6.5. Digital to Analog Converter (DAC) Characteristics 44.6.6. Analog Comparator Characteristics 44.6.7. Temperature Sensor Characteristics 44.7. NVM Characteristics 44.8. Oscillators Characteristics 44.8.1. Crystal Oscillator (XOSC) Characteristics 44.8.1.1. Digital Clock Characteristics 44.8.1.2. Crystal Oscillator Characteristics 44.8.2. External 32 kHz Crystal Oscillator (XOSC32K) Characteristics 44.8.2.1. Digital Clock Characteristics 44.8.2.2. Crystal Oscillator Characteristics 44.8.3. Digital Frequency Locked Loop (DFLL48M) Characteristics 44.8.4. 32.768kHz Internal oscillator (OSC32K) Characteristics 44.8.5. Ultra Low Power Internal 32kHz RC Oscillator (OSCULP32K) Characteristics 44.8.6. 8MHz RC Oscillator (OSC8M) Characteristics 44.8.7. Fractional Digital Phase Locked Loop (FDPLL96M) Characteristics 44.8.8. USB Characteristics 44.9. Timing Characteristics 44.9.1. SERCOM in SPI Mode Timing 44.9.2. SERCOM in I2C Mode Timing 44.9.3. I2S Timing The Microchip Web Site Customer Change Notification Service Customer Support Product Identification System Microchip Devices Code Protection Feature Legal Notice Trademarks Quality Management System Certified by DNV Worldwide Sales and Service