ATmega64 Atmel Corporation, ATmega64 Datasheet - Page 73

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ATmega64

Manufacturer Part Number
ATmega64
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of ATmega64

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

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Alternate Functions of
Port A
2490Q–AVR–06/10
The Port A has an alternate function as the address low byte and data lines for the External
Memory Interface.
Table 27. Port A Pins Alternate Functions
Table 28
Figure 33 on page
Table 28. Overriding Signals for Alternate Functions in PA7..PA4
Signal
Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
DI
AIO
Port Pin
PA7
PA6
PA5
PA4
PA3
PA2
PA1
PA0
and
Table 29
~(WR | ADA
PORTA7 • PUD
OUTPUT • WR
A7 • ADA | D7
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
WR | ADA
D7 INPUT
SRE
SRE
SRE
71.
0
0
relates the alternate functions of Port A to the overriding signals shown in
(1)
) •
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
WR | ADA
D5 INPUT
SRE
SRE
SRE
0
0
ATmega64(L)
PORTA4 • PUD
OUTPUT • WR
~(WR | ADA) •
A4 • ADA | D4
PA4/AD4
D4 INPUT
WR | ADA
SRE
SRE
SRE
0
0
73

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