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ATmega128-16AU Datasheet(PDF) 74 Page - ATMEL Corporation |
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ATmega128-16AU Datasheet(HTML) 74 Page - ATMEL Corporation |
74 / 386 page 74 2467S–AVR–07/09 ATmega128 Alternate Functions of Port B The Port B pins with alternate functions are shown in Table 30. Note: 1. OC1C not applicable in ATmega103 compatibility mode. The alternate pin configuration is as follows: • OC2/OC1C, Bit 7 OC2, Output Compare Match output: The PB7 pin can serve as an external output for the Timer/Counter2 Output Compare. The pin has to be configured as an output (DDB7 set “one”) to serve this function. The OC2 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. Table 29. Overriding Signals for Alternate Functions in PA3..PA0 Signal Name PA3/AD3 PA2/AD2 PA1/AD1 PA0/AD0 PUOE SRE SRE SRE SRE PUOV ~(WR | ADA) • PORTA3 • PUD ~(WR | ADA) • PORTA2 • PUD ~(WR | ADA) • PORTA1 • PUD ~(WR | ADA) • PORTA0 • PUD DDOE SRE SRE SRE SRE DDOV WR | ADA WR | ADA WR | ADA WR | ADA PVOE SRE SRE SRE SRE PVOV A3 • ADA | D3 OUTPUT • WR A2• ADA | D2 OUTPUT • WR A1 • ADA | D1 OUTPUT • WR A0 • ADA | D0 OUTPUT • WR DIEOE 0 0 0 0 DIEOV 0 0 0 0 DI D3 INPUT D2 INPUT D1 INPUT D0 INPUT AIO – – – – Table 30. Port B Pins Alternate Functions Port Pin Alternate Functions PB7 OC2/OC1C(1) (Output Compare and PWM Output for Timer/Counter2 or Output Compare and PWM Output C for Timer/Counter1) PB6 OC1B (Output Compare and PWM Output B for Timer/Counter1) PB5 OC1A (Output Compare and PWM Output A for Timer/Counter1) PB4 OC0 (Output Compare and PWM Output for Timer/Counter0) PB3 MISO (SPI Bus Master Input/Slave Output) PB2 MOSI (SPI Bus Master Output/Slave Input) PB1 SCK (SPI Bus Serial Clock) PB0 SS (SPI Slave Select input) |
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