Datasheet ATmega64A - Summary (Microchip) - 9

6. Pin Configurations Figure 6-1 Pinout ATmega64A
Power Ground Programming/debug Digital Analog Crystal/Osc External Memory (AD0) (AD1) (AD2) VCC A GND AREF PF0 (ADC0) PF1 (ADC1) PF2 (ADC2) PF3 (ADC3) PF4 (ADC4/TCK) PF5 (ADC5/TMS) PF6 (ADC6/TDO) PF7 (ADC7/TDI) GND VCC PA0 PA1 PA2 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 PEN 1 48 PA3 (AD3) (RXD0/PDI) PE0 2 47 PA4 (AD4) (TXD0/PDO) PE1 3 46 PA5 (AD5) (XCK0/AIN0) PE2 4 45 PA6 (AD6) (OC3A/AIN1) PE3 5 44 PA7 (AD7) (OC3B/INT4) PE4 6 43 PG2 (ALE) (OC3C/INT5) PE5 7 42 PC7 (A15) (T3/INT6) PE6 8 41 PC6 (A14) (ICP3/INT7) PE7 9 40 PC5 (A13) (SS) PB0 10 39 PC4 (A12) (SCK) PB1 11 38 PC3 (A11) (MOSI) PB2 12 37 PC2 (A10) (MISO) PB3 13 36 PC1 (A9) (OC0) PB4 14 35 PC0 (A8) (OC1A) PB5 15 34 PG1 (RD) (OC1B) PB6 16 33 PG0 (WR) 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 VCC GND TAL2 TAL1 PD1 PD2 PD4 RESET X X (T1) PD6 (T2) PD7 OSC2) PG3 OSC1) PG4 (ICP1) (T (T (XCK1) PD5 (OC2/OC1C) PB7 (SCL/INT0) PD0 (SDA/INT1) (RXD1/INT2) (TXD1/INT3) PD3
Note: 
The Pinout figure applies to both TQFP and MLF packages. The bottom pad under the QFN/MLF package should be soldered to ground.
6.1. Pin Descriptions 6.1.1. VCC
Digital supply voltage. Atmel ATmega64A [DATASHEET] 9 Atmel-8160ES-8-bit AVR Micrcontroller_Datasheet_Summary-09/2015 Document Outline Introduction Features Table of Contents 1. Description 2. Configuration Summary 3. Ordering Information 4. Block Diagram 5. ATmega103 and ATmega64A Compatibility 5.1. ATmega103 Compatibility Mode 6. Pin Configurations 6.1. Pin Descriptions 6.1.1. VCC 6.1.2. GND 6.1.3. Port A (PA7:PA0) 6.1.4. Port B (PB7:PB0) 6.1.5. Port C (PC7:PC0) 6.1.6. Port D (PD7:PD0) 6.1.7. Port E (PE7:PE0) 6.1.8. Port F (PF7:PF0) 6.1.9. Port G (PG4:PG0) 6.1.10. RESET 6.1.11. XTAL1 6.1.12. XTAL2 6.1.13. AVCC 6.1.14. AREF 6.1.15. PEN 7. Resources 8. Data Retention 9. About Code Examples 10. Capacitive Touch Sensing 11. Packaging Information 11.1. 64A 11.2. 64M1 12. Errata 12.1. ATmega64A Rev. D