Datasheet ATmega328/P - Summary (Microchip) - 5

2. Configuration Summary Features ATmega328/P
Pin Count 28/32 Flash (Bytes) 32K SRAM (Bytes) 2K EEPROM (Bytes) 1K Interrupt Vector Size (instruction word/vector) 1/1/2 General Purpose I/O Lines 23 SPI 2 TWI (I2C) 1 USART 1 ADC 10-bit 15kSPS ADC Channels 8 8-bit Timer/Counters 2 16-bit Timer/Counters 1 and support a real Read-While-Write Self-Programming mechanism. There is a separate Boot Loader Section, and the SPM instruction can only execute from there. In , there is no Read-While-Write support and no separate Boot Loader Section. The SPM instruction can execute from the entire Flash. Atmel ATmega328/P [DATASHEET] 5 Atmel-42735B-328/P_Datasheet_Summary-11/2016 Document Outline Introduction Feature Table of Contents 1. Description 2. Configuration Summary 3. Ordering Information 3.1. ATmega328 3.2. ATmega328P 4. Block Diagram 5. Pin Configurations 5.1. Pin-out 5.2. Pin Descriptions 5.2.1. VCC 5.2.2. GND 5.2.3. Port B (PB[7:0]) XTAL1/XTAL2/TOSC1/TOSC2 5.2.4. Port C (PC[5:0]) 5.2.5. PC6/RESET 5.2.6. Port D (PD[7:0]) 5.2.7. AVCC 5.2.8. AREF 5.2.9. ADC[7:6] (TQFP and VFQFN Package Only) 6. I/O Multiplexing 7. Resources 8. Data Retention 9. About Code Examples 10. Capacitive Touch Sensing 10.1. QTouch Library 11. Packaging Information 11.1. 32-pin 32A 11.2. 32-pin 32M1-A 11.3. 28-pin 28M1 11.4. 28-pin 28P3