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ATmega169PV-8MCH 数据表(PDF) 74 Page - ATMEL Corporation |
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ATmega169PV-8MCH 数据表(HTML) 74 Page - ATMEL Corporation |
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74 / 393 page  74 8018N–AVR–08/09 ATmega169P 13.3.2 Alternate Functions of Port B The Port B pins with alternate functions are shown in Table 13-6. The alternate pin configuration is as follows: • OC2A/PCINT15, Bit 7 OC2, Output Compare Match A output: The PB7 pin can serve as an external output for the Timer/Counter2 Output Compare A. The pin has to be configured as an output (DDB7 set (one)) to serve this function. The OC2A pin is also the output pin for the PWM mode timer function. PCINT15, Pin Change Interrupt source 15: The PB7 pin can serve as an external interrupt source. Table 13-5. Overriding Signals for Alternate Functions in PA3..PA0 Signal Name PA3/COM3 PA2/COM2 PA1/COM1 PA0/COM0 PUOE LCDEN • (LCDMUX>2) LCDEN • (LCDMUX>1) LCDEN • (LCDMUX>0) LCDEN PUOV 00 00 DDOE LCDEN • (LCDMUX>2) LCDEN • (LCDMUX>1) LCDEN • (LCDMUX>0) LCDEN DDOV 0 0 0 0 PVOE 00 00 PVOV 00 00 PTOE –– –– DIEOE LCDEN • (LCDMUX>2) LCDEN • (LCDMUX>1) LCDEN • (LCDMUX>0) LCDEN DIEOV 0 0 0 0 DI –– –– AIO COM3COM2COM1COM0 Table 13-6. Port B Pins Alternate Functions Port Pin Alternate Functions PB7 OC2A/PCINT15 (Output Compare and PWM Output A for Timer/Counter2 or Pin Change Interrupt15). PB6 OC1B/PCINT14 (Output Compare and PWM Output B for Timer/Counter1 or Pin Change Interrupt14). PB5 OC1A/PCINT13 (Output Compare and PWM Output A for Timer/Counter1 or Pin Change Interrupt13). PB4 OC0A/PCINT12 (Output Compare and PWM Output A for Timer/Counter0 or Pin Change Interrupt12). PB3 MISO/PCINT11 (SPI Bus Master Input/Slave Output or Pin Change Interrupt11). PB2 MOSI/PCINT10 (SPI Bus Master Output/Slave Input or Pin Change Interrupt10). PB1 SCK/PCINT9 (SPI Bus Serial Clock or Pin Change Interrupt9). PB0 SS/PCINT8 (SPI Slave Select input or Pin Change Interrupt8). |
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