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ATmega16HVB 数据表(PDF) 66 Page - ATMEL Corporation |
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ATmega16HVB 数据表(HTML) 66 Page - ATMEL Corporation |
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66 / 273 page  66 8042A–AVR–07/09 ATmega16HVB/32HVB • INT3/ SDA - Port C, Bit3 INT3: External Interrupt Source 3. This pin can serve as external interrupt source. INT3 can be used as an interrupt pin regardless of whether another function is enabled or not. SDA: SM Bus Data. This pin can serve as bidirectional serial data line for the 2-wire Serial Interface. • SCL - Port C, Bit4 SCL: SM Bus Clock. This pin can serve as bidirectional clock line for the 2-wire Serial Interface Table 14-3 on page 66 relates the alternate functions of Port C to the overriding signals shown in Figure 14-3 on page 64. 14.5 Register Description 14.5.1 PORTC – Port C Data Register 14.5.2 PINC – Port C Input Pins Address Table 14-3. Overriding Signals for Alternate Functions in PC4:0 Signal Name PC4/SCL PC3/INT3/SDA PC2/INT2 PC1/INT1 PC0/INT0/EXTPROT PVOE SM BUS ENABLED SM BUS ENABLED EXTPROT ENABLE PVOV SM BUS CLOCK SM BUS DATA 1 DIEOE SM BUS ENABLED INT3 ENABLE SM BUS ENABLED INT2 ENABLE INT1ENABLE INT0 ENABLE EXTPROT ENABLE DIEOV 1 1 1 1 1 DI SM BUS CLOCK INT3 INPUT SM BUS DATA INT2 INPUT INT1 INPUT INT0 INPUT EXTPROT INPUT DIDR Bit 765 432 10 0x08 (0x28) – – PORTC5 PORTC4 PORTC3 PORTC2 PORTC1 PORTC0 PORTC Read/Write R R R/W R/W R/W R/W R/W R/W Initial Value 0 0 0 0 0 0 0 0 Bit 765 432 10 0x06 (0x26) –– - PINC4 PINC3 PINC2 PINC1 PINC0 PINC Read/Write RR RRR RRR Initial Value N/A N/A N/A N/A N/A N/A N/A N/A |
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