ATMEGA2561-16AI Atmel, ATMEGA2561-16AI Datasheet - Page 78
![IC AVR MCU 256K 16MHZ 64TQFP](/photos/12/13/121332/313-64-tqfp_sml.jpg)
ATMEGA2561-16AI
Manufacturer Part Number
ATMEGA2561-16AI
Description
IC AVR MCU 256K 16MHZ 64TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA2561-16AI
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
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)
4.5 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP, 64-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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Part Number
Manufacturer
Quantity
Price
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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
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