ATTINY43U_1 Datasheet, PDF (74/182 Pages) ATMEL Corporation – 8-bit Microcontroller with 4K Bytes In-System Programmable Flash and Boost Converter

11.3.2
Alternate Functions of Port B
The Port B pins with alternate function are shown in Table 11-8 on page 74.
Table 11-8. Port B Pins Alternate Functions
Port Pin
Alternate Function
T0: Timer/Counter0 Counter Source.
PB0
PCINT8: Pin change interrupt 1 source 8.
OC0A: Timer/Counter0 Compare Match A output.
PB1
PCINT9: Pin change interrupt 1 source 9.
OC0B: Timer/Counter0 Compare Match B output.
PB2
PCINT10:Pin change interrupt 1 source 10.
T1: Timer/Counter1 Counter Source.
PB3
CLKO: System Clock Output.
PCINT11:Pin change interrupt 1 source 11.
OC1A: Timer/Counter1 Compare Match A output.
DI:
USI Data Input three wire mode.
PB4
SDA: USI Data Input two wire mode.
PCINT12:Pin change interrupt 1 source 12.
OC1B: Timer/Counter1 Compare Match B output.
PB5
DO: USI Data Output three wire mode.
PCINT13:Pin change interrupt 1 source 13.
USCK: USI Clock three wire mode.
PB6
SCL: USI Clock two wire mode.
PCINT14:Pin change interrupt 1 source 14.
INT0: External Interrupt 0 input.
PB7
PCINT15:Pin change interrupt 1 source 15.
• Port B, Bit 0 – T0/PCINT8
T0: Timer/Counter0 Counter Source.
PCINT8: Pin Change Interrupt source 8. The PB0 pin can serve as an external interrupt source
for pin change interrupt 1.
• Port B, Bit 1 – OC0A/PCINT9
OC0A: Output Compare Match output: The PB1 pin can serve as an external output for the
Timer/Counter0 Compare Match A. The PB1 pin has to be configured as an output (DDB1 set
(one)) to serve this function. The OC0A pin is also the output pin for the PWM mode timer
function.
PCINT9: Pin Change Interrupt source 9. The PB1 pin can serve as an external interrupt source
for pin change interrupt 1.
• Port B, Bit 2 – OC0B/PCINT10
OC0B: Output Compare Match output: The PB2 pin can serve as an external output for the
Timer/Counter0 Compare Match A. The PB2 pin has to be configured as an output (DDB2 set
(one)) to serve this function. The OC0B pin is also the output pin for the PWM mode timer
function.
74 ATtiny43U
8048B–AVR–03/09