Datasheet ATmega164A - Summary (Microchip) - 10

5.1.2. TQFN and QFN
1) Power Ground Programming/debug Digital IN1/OC0A/PCINT1 Analog Crystal/Osc PB4 (SS/OC0B/PCINT12) PB3 (A PB2 (AIN0/INT2/PCINT10) PB1 (T1/CLKO/PCINT9) PB0 (XCK0/T0/PCINT8) GND VCC PA0 (ADC0/PCINT0) PA1 (ADC1/PCINT1) PA2 (ADC2/PCINT2) PA3 (ADC3/PCINT3) 4 3 2 1 0 9 8 7 6 5 4 4 4 4 4 4 3 3 3 3 3 3 (PCINT13/MOSI) PB5 1 33 PA4 (ADC4/PCINT4) (PCINT14/MISO) PB6 2 32 PA5 (ADC5/PCINT5) (PCINT15/SCK) PB7 3 31 PA6 (ADC6/PCINT6) RESET 4 30 PA7 (ADC7/PCINT7) VCC 5 29 AREF GND 6 28 GND XTAL2 7 27 AVCC XTAL1 8 26 PC7 (TOSC2/PCINT23) (PCINT24/RXD0) PD0 9 25 PC6 (TOSC1/PCINT22) (PCINT25/TXD0) PD1 10 24 PC5 (TDI/PCINT21) 11 (PCINT26/RXD1/INT0) PD2 23 PC4 (TDO/PCINT20) 12 13 14 15 16 22 21 20 19 18 17 (PCINT27/TXD1/INT1) PD3 (PCINT28/XCK1/OC1B) PD4 (PCINT29/OC1A) PD5 (PCINT30/OC2B/ICP1) PD6 (PCINT31/OC2A) PD7 VCC GND (PCINT16/SCL) PC0 (PCINT17/SDA) PC1 (PCINT18/TCK) PC2 (PCINT19/TMS) PC3 Atmel ATmega164A [DATASHEET] 10 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