ATMEGA2561V-8MI Atmel, ATMEGA2561V-8MI Datasheet - Page 78

• Manufacturer Part Number: ATMEGA2561V-8MI
• Description: IC AVR MCU 256K 8MHZ 64-QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA2561V-8MI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 54
• Program Memory Size: 256KB (128K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-MLF®, 64-QFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

12.3.1
2549M–AVR–09/10
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 12-3.
Table 12-4
signals shown in
Table 12-4.
Note:
DIEOE
DIEOV
Signal
PUOE
DDOE
DDOV
Name
PUOV
PVOE
PVOV
AIO
DI
Port Pin
PA7
PA6
PA5
PA4
PA3
PA2
PA1
PA0
1. ADA is short for ADdress Active and represents the time when address is output. See
and
nal Memory Interface” on page 28
~(WR | ADA
PORTA7 • PUD
OUTPUT • WR
A7 • ADA | D7
Port A Pins Alternate Functions
Overriding Signals for Alternate Functions in PA7:PA4
Table 12-5 on page 79
D7 INPUT
WR | ADA
PA7/AD7
Figure 12-5 on page
SRE
SRE
SRE
0
0
–
(1)
) •
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)
ATmega640/1280/1281/2560/2561
PORTA6 • PUD
OUTPUT • WR
~(WR | ADA) •
A6 • ADA | D6
WR | ADA
D6 INPUT
PA6/AD6
76.
relates the alternate functions of Port A to the overriding
SRE
SRE
SRE
0
0
–
for details.
Alternate Function
PORTA5 • PUD
OUTPUT • WR
~(WR | ADA) •
A5 • ADA | D5
WR | ADA
D5 INPUT
PA5/AD5
SRE
SRE
SRE
0
0
–
PORTA4 • PUD
OUTPUT • WR
~(WR | ADA) •
A4 • ADA | D4
D4 INPUT
WR | ADA
PA4/AD4
SRE
SRE
SRE
0
0
–
“Exter-
78