ATmega64A Atmel Corporation, ATmega64A Datasheet - Page 75

• Manufacturer Part Number: ATmega64A
• Manufacturer: Atmel Corporation

Specifications of ATmega64A

• Flash (kbytes): 64 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 53
• Ext Interrupts: 8
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 4
• Eeprom (bytes): 2048
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 8
• Input Capture Channels: 2
• Pwm Channels: 7
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

13.3.1
8160C–AVR–07/09
Alternate Functions of Port A
The Port A has an alternate function as the address low byte and data lines for the External
Memory Interface.
Table 13-3.
Table 13-4
shown in
Table 13-4.
Signal
Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
DI
AIO
Port Pin
PA7
PA6
PA5
PA4
PA3
PA2
PA1
PA0
Figure 13-5 on page
and
A7 • ADA | D7 OUTPUT
Port A Pins Alternate Functions
Overriding Signals for Alternate Functions in PA7:PA4
~(WR | ADA
PORTA7 • PUD
Table 13-5
Alternate Function
AD7 (External memory interface address and data bit 7)
AD6 (External memory interface address and data bit 6)
AD5 (External memory interface address and data bit 5)
AD4 (External memory interface address and data bit 4)
AD3 (External memory interface address and data bit 3)
AD2 (External memory interface address and data bit 2)
AD1 (External memory interface address and data bit 1)
AD0 (External memory interface address and data bit 0)
PA7/AD7
D7 INPUT
WR | ADA
• WR
SRE
SRE
SRE
0
0
–
(1)
) •
relates the alternate functions of Port A to the overriding signals
73.
PORTA6 • PUD
OUTPUT • WR
~(WR | ADA) •
A6 • ADA | D6
PA6/AD6
WR | ADA
D6 INPUT
SRE
SRE
SRE
0
0
–
PORTA5 • PUD
OUTPUT • WR
~(WR | ADA) •
A5 • ADA | D5
PA5/AD5
D5 INPUT
WR | ADA
SRE
SRE
SRE
0
0
–
ATmega64A
PORTA4 • PUD
OUTPUT • WR
~(WR | ADA) •
A4 • ADA | D4
PA4/AD4
WR | ADA
D4 INPUT
SRE
SRE
SRE
0
0
–
75