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AT90PWM3 датащи(PDF) 76 Page - ATMEL Corporation |
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AT90PWM3 датащи(HTML) 76 Page - ATMEL Corporation |
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76 / 361 page ![]() 76 4317J–AVR–08/10 AT90PWM2/3/2B/3B 11.3.5 Alternate Functions of Port E The Port E pins with alternate functions are shown in Table 11-12. The alternate pin configuration is as follows: • XTAL2/ADC0 – Bit 2 XTAL2: Chip clock Oscillator pin 2. Used as clock pin for crystal Oscillator or Low-frequency crystal Oscillator. When used as a clock pin, the pin can not be used as an I/O pin. ADC0, Analog to Digital Converter, input channel 0. • XTAL1/OC0B – Bit 1 Table 11-11. Overriding Signals for Alternate Functions in PD3..PD0 Signal Name PD3/TXD/OC0A/ SS/MOSI_A PD2/PSCIN2/ OC1A/MISO_A PD1/PSCIN0/ CLKO PD0/PSCOUT00/X CK/SS_A PUOE TXEN + SPE • MSTR • SPIPS –0 SPE • MSTR • SPIPS PUOV TXEN • SPE • MSTR • SPIPS • PD3 • PUD – 0 PD0 • PUD DDOE TXEN + SPE • MSTR • SPIPS –0 PSCen00 + SPE • MSTR • SPIPS DDOV TXEN 0 0 PSCen00 PVOE TXEN + OC0en + SPE • MSTR • SPIPS – 0 PSCen00 + UMSEL PVOV TXEN • TXD + TXEN • (OC0en • OC0 + OC0en • SPIPS • MOSI) –0 – DIEOE 0 0 0 0 DIEOV 0 0 0 0 DI SS MOSI_Ain SS_A AIO Table 11-12. Port E Pins Alternate Functions Port Pin Alternate Function PE2 XTAL2: XTAL Output ADC0 (Analog Input Channel 0) PE1 XTAL1: XTAL Input OC0B (Timer 0 Output Compare B) PE0 RESET# (Reset Input) OCD (On Chip Debug I/O) |
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