ATMEGA2561V ATMEL [ATMEL Corporation], ATMEGA2561V Datasheet - Page 92

• Manufacturer Part Number: ATMEGA2561V
• Description: 8-bit Microcontroller with 64K/128K/256K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

Alternate Functions of Port B
92
ATmega640/1280/1281/2560/2561
Table 41. Overriding Signals for Alternate Functions in PA3:PA0
The Port B pins with alternate functions are shown in Table 42.
Table 42. Port B Pins Alternate Functions
The alternate pin configuration is as follows:
• OC0A/OC1C/PCINT7, Bit 7
OC0A, Output Compare Match A output: The PB7 pin can serve as an external output
for the Timer/Counter0 Output Compare. The pin has to be configured as an output
(DDB7 set “one”) to serve this function. The OC0A pin is also the output pin for the PWM
mode timer function.
OC1C, Output Compare Match C output: The PB7 pin can serve as an external output
for the Timer/Counter1 Output Compare C. The pin has to be configured as an output
(DDB7 set (one)) to serve this function. The OC1C pin is also the output pin for the
PWM mode timer function.
Signal
Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
DI
AIO
Port Pin
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
PA3/AD3
SRE
~(WR | ADA) •
PORTA3 • PUD
SRE
WR | ADA
SRE
A3 • ADA | D3
OUTPUT • WR
0
0
D3 INPUT
–
Alternate Functions
OC0A/OC1C/PCINT7 (Output Compare and PWM Output A for Timer/Counter0,
Output Compare and PWM Output C for Timer/Counter1 or Pin Change Interrupt 7)
OC1B/PCINT6 (Output Compare and PWM Output B for Timer/Counter1 or Pin
Change Interrupt 6)
OC1A/PCINT5 (Output Compare and PWM Output A for Timer/Counter1 or Pin
Change Interrupt 5)
OC2A/PCINT4 (Output Compare and PWM Output A for Timer/Counter2 or Pin
Change Interrupt 4)
MISO/PCINT3 (SPI Bus Master Input/Slave Output or Pin Change Interrupt 3)
MOSI/PCINT2 (SPI Bus Master Output/Slave Input or Pin Change Interrupt 2)
SCK/PCINT1 (SPI Bus Serial Clock or Pin Change Interrupt 1)
SS/PCINT0 (SPI Slave Select input or Pin Change Interrupt 0)
PA2/AD2
SRE
~(WR | ADA) •
PORTA2 • PUD
SRE
WR | ADA
SRE
A2• ADA | D2
OUTPUT • WR
0
0
D2 INPUT
–
PA1/AD1
SRE
~(WR | ADA) •
PORTA1 • PUD
SRE
WR | ADA
SRE
A1 • ADA | D1
OUTPUT • WR
0
0
D1 INPUT
–
PA0/AD0
SRE
~(WR | ADA) •
PORTA0 • PUD
SRE
WR | ADA
SRE
A0 • ADA | D0
OUTPUT • WR
0
0
D0 INPUT
–
2549K–AVR–01/07