Datasheet RN4678 (Microchip) - 3

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RN4678 1.0 DEVICE OVERVIEW
The RN4678 is a complete and fully regulatory certified module with an integral ceramic chip antenna and RF The RN4678 module is a fully certified, embedded shield. Bluetooth (BR/EDR/LE) wireless module. The module The RN4678 is a small, compact and surface mounted includes an on-board Bluetooth stack, power module with castellated pads for easy and reliable host management subsystem, a 2.4 GHz transceiver, and RF power amplifier. Customers can embed Bluetooth PCB mounting. The module is compatible with standard pick-and-place equipment and can functionality into any application using the RN4678 independently maintain a low-power wireless module. connection. Low-power usage and flexible power The RN4678 enables rapid product development and management maximize the lifetime of the RN4678 faster time to market, and it is designed to provide module in battery-operated devices. A wide operating integrators with the following features: temperature range enables its applications in indoor • Simple integration and programming and outdoor environments. • Reduced development time Figure 1-1 il ustrates the internal block diagram of the • Superior wireless module with low-cost system RN4678 module. • Interoperability with Bluetooth host • Wide range of applications
FIGURE 1-1: RN4678 INTERNAL BLOCK DIAGRAM RN4678 BT Dual Mode Module
PMU
Antenna
BAT_ IN BAT_ DET Matching SW_ BTN SW_ BTN LDO33_O Bluetooth LDO3V3_OUT Baseband
IS1678 S/SM 16 MHz
LDO18_O & RF LDO1V8_OUT
CRYSTAL
VDD_IO VDDIO RST_N Core RST_N 320 KB ROM 28 KB SRAM WAKEUP WAKEUP MCU
GPIO
LED DRIVER LED 4 Mb Flash TXD (Only IS1678SM) HOST MCU RXD UART RTS CTS EEPROM  2016-2020 Microchip Technology Inc. DS50002519E-page 3 Document Outline RN4678 Features RF/Analog Data Throughput Operating Conditions MAC/Baseband/Higher Layer Features Applications Description Table of Contents Most Current Data Sheet Errata Customer Notification System 1.0 Device Overview FIGURE 1-1: RN4678 Internal Block Diagram TABLE 1-1: PIN Description FIGURE 1-2: RN4678 PIN DIAGRAM 2.0 Application Information 2.1 Module Configuration 2.2 Flow Control 2.3 Control and Indication I/O Pins 2.4 Power Tree FIGURE 2-1: Power Tree Diagram 2.5 Software Button (SW_BTN) FIGURE 2-2: SW_BTN TIME (HIGH) AT APP MODE(1,2) FIGURE 2-3: SW_BTN TIME (LOW) AT ACCESS STATES(1) FIGURE 2-4: SW_BTN TIME (LOW) AT LINK STATES(1,2) 2.6 WAKE-UP FIGURE 2-5: WAKE-UP TIME(1) 2.7 External Reset FIGURE 2-6: TIMING WAVEFORMS ON RESET (1,2) 2.8 LED Driver FIGURE 2-7: LED Driver 2.9 Host MCU Interface over UART FIGURE 2-8: Power and MCU Interface Example for Rn4678 2.10 Reference Circuit FIGURE 2-9: RN4678 Reference Circuit 3.0 Electrical Characteristics Absolute Maximum Ratings TABLE 3-1: Recommended Operating Conditions TABLE 3-2: 3.3V LDO Electrical Parameters (1,2) TABLE 3-3: PMU LDO(1,2) TABLE 3-4: SAR-ADC AND Battery Voltage Detector TABLE 3-5: Intensity Controllable LED Driver TABLE 3-6: Power Consumption-Classic(1) TABLE 3-7: Power Consumption-Low Energy(1,2) 4.0 Radio Characteristics TABLE 4-1: Transmitter Performance (1,2) TABLE 4-2: Receiver Performance(1) 5.0 Physical Dimensions FIGURE 5-1: RN4678 Module Dimensions FIGURE 5-2: RN4678 Recommended PCB Footprint FIGURE 5-3: RN4678 Host PCB Mounting Suggestion 6.0 Reflow profile FIGURE 6-1: Reflow Profile 7.0 Module Placement FIGURE 7-1: Module Placement Examples TABLE 7-1: Recommended Antenna FIGURE 7-2: Keep Out Area Recommended for Antenna 7.1 RN4678 Ceramic Chip Antenna FIGURE 7-3: RN4678 Antenna Radiation Pattern 8.0 Ordering Information TABLE 8-1: Ordering Information 9.0 Regulatory Approval 9.1 United States 9.2 Canada 9.3 Europe TABLE 9-1: EUROPEAN COMPLIANCE TESTING 9.4 Japan 9.5 Korea 9.6 Taiwan 9.7 China 9.8 Other Regulatory Information Appendix A: Revision History The Microchip WebSite Product Identification System Trademarks Worldwide Sales