ATtiny87-15XZ datasheet(83/282 Pages) ATMEL

83 / 282 page

7728D–AVR–07/09

ATtiny87/ATtiny167

• PCINT10/OC1AV/USCK/SCL – Port B, Bit 2

PCINT10: Pin Change Interrupt, source 10.

OC1AV: Output Compare and PWM Output A-V for Timer/Counter1. The PB2 pin has to be

configured as an output (DDB2 set (one)) to serve this function. The OC1AV pin is

also the output pin for the PWM mode timer function (c.f. OC1AV bit of TCCR1D regis-

ter).

USCK: Three-wire Mode USI Clock Input.

SCL: Two-wire Mode USI Clock Input.

• PCINT9/OC1BU/DO – Port B, Bit 1

PCINT9: Pin Change Interrupt, source 9.

OC1BU: Output Compare and PWM Output B-U for Timer/Counter1. The PB1 pin has to be

configured as an output (DDB1 set (one)) to serve this function. The OC1BU pin is

also the output pin for the PWM mode timer function (c.f. OC1BU bit of TCCR1D reg-

ister).

DO: Three-wire Mode USI Data Output. Three-wire mode data output overrides PORTB1

and it is driven to the port when the data direction bit DDB1 is set. PORTB1 still

enables the pull-up, if the direction is input and PORTB1 is set (one).

• PCINT8/OC1AU/DI/SDA – Port B, Bit 0

IPCINT8: Pin Change Interrupt, source 8.

OC1AU: Output Compare and PWM Output A-U for Timer/Counter1. The PB0 pin has to be

configured as an output (DDB0 set (one)) to serve this function. The OC1AU pin is

also the output pin for the PWM mode timer function (c.f. OC1AU bit of TCCR1D regis-

ter).

DI: Three-wire Mode USI Data Input. USI Three-wire mode does not override normal port

functions, so pin must be configure as an input for DI function.

SDA: Two-wire Mode Serial Interface (USI) Data Input / Output.

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