Datasheet ATmega164A - Summary (Microchip) - 6

2. Configuration Summary
The table below compares the device series of feature and pin compatible devices, providing a seamless migration path.
Table 2-1. Configuration Summary and Device Comparison Features ATmega164A ATmega324A ATmega644A ATmega1284
Pin Count 40/44/49 40/44/49 40/44 40/44 Flash (Bytes) 16K 32K 64K 128K SRAM (Bytes) 1K 2K 4K 16K EEPROM (Bytes) 512 1K 2K 4K General Purpose 32 32 32 32 I/O Lines SPI 1 1 1 1 TWI (I2C) 1 1 1 1 USART 2 2 2 2 ADC 10-bit 15ksps 10-bit 15ksps 10-bit 15ksps 10-bit 15ksps ADC Channels 8 8 8 8 Analog Comparator 1 1 1 1 8-bit Timer/ 2 2 2 2 Counters 16-bit Timer/ 1 1 1 2 Counters PWM channels 6 6 6 8 Packages PDIP PDIP PDIP PDIP TQFP TQFP TQFP TQFP VQFN/QFN VQFN/QFN VQFN/QFN VQFNQFN DRQFN DRQFN VFBGA VFBGA Atmel ATmega164A [DATASHEET] 6 Atmel-42712C-ATmega164A_Datasheet_Summary-10/2016 Document Outline Introduction Feature Table of Contents 1. Description 2. Configuration Summary 3. Ordering Information 4. Block Diagram 5. Pin Configurations 5.1. Pinout 5.1.1. PDIP 5.1.2. TQFN and QFN 5.1.3. DRQFN 5.1.4. VFBGA 5.2. Pin Descriptions 5.2.1. VCC 5.2.2. GND 5.2.3. Port A (PA[7:0]) 5.2.4. Port B (PB[7:0]) 5.2.5. Port C (PC[7:0]) 5.2.6. Port D (PD[7:0]) 5.2.7. RESET 5.2.8. XTAL1 5.2.9. XTAL2 5.2.10. AVCC 5.2.11. AREF 6. I/O Multiplexing 7. General Information 7.1. Resources 7.2. Data Retention 7.3. About Code Examples 7.4. Capacitive Touch Sensing 7.4.1. QTouch Library 8. Packaging Information 8.1. 40-pin PDIP 8.2. 44-pin TQFP 8.3. 44-pin VQFN 8.4. 44-pin QFN 8.5. 49-pin VFBGA