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ATMEGA128A データシート(PDF) 84 Page - ATMEL Corporation |
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ATMEGA128A データシート(HTML) 84 Page - ATMEL Corporation |
84 / 369 page 84 ATmega 128A [DATASHEET] Atmel-8151I-8-bit-AVR-ATmega128A_Datasheet-08/2014 12.4 Register Description 12.4.1 SFIOR - Special Function IO Register • Bit 2 – PUD: Pull-up disable When this bit is written to one, the pull-ups in the I/O ports are disabled even if the DDxn and PORTxn Registers are configured to enable the pull-ups ({DDxn, PORTxn} = 0b01). See “Configuring the Pin” on page 65 for more details about this feature. 12.4.2 PORTA - Port A Data Register 12.4.3 DDRA - Port A Data Direction Register 12.4.4 PINA - Port A Input Pins Address Table 12-22. Overriding Signals for Alternate Functions in PG0 Signal Name PG0/WR PUOE SRE PUOV 0 DDOE SRE DDOV 1 PVOE SRE PVOV WR DIEOE 0 DIEOV 0 DI – AIO – Bit 7 6 5 4 3 2 1 0 TSM – – – ACME PUD PSR0 PSR321 SFIOR Read/Write R/W R R R R/W R/W R/W R/W Initial Value 0 0 0 0 0 0 0 0 Bit 76543210 PORTA7 PORTA6 PORTA5 PORTA4 PORTA3 PORTA2 PORTA1 PORTA0 PORTA Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 00000000 Bit 7 6543210 DDA7 DDA6 DDA5 DDA4 DDA3 DDA2 DDA1 DDA0 DDRA Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 0 0000000 Bit 7 6543210 PINA7 PINA6 PINA5 PINA4 PINA3 PINA2 PINA1 PINA0 PINA Read/Write R RRRRR RR Initial Value N/A N/A N/A N/A N/A N/A N/A N/A |
同様の部品番号 - ATMEGA128A |
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同様の説明 - ATMEGA128A |
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