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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PIC12F635 датащи(PDF) 42 Page - Microchip Technology |
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PIC12F635 датащи(HTML) 42 Page - Microchip Technology |
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42 / 196 page  PIC12F635/PIC16F636/639 DS41232B-page 40 Preliminary © 2005 Microchip Technology Inc. REGISTER 4-1: WDA – WEAK PULL-UP/PULL-DOWN REGISTER (ADDRESS: 97h) REGISTER 4-2: WPUDA – WEAK PULL-UP/PULL-DOWN DIRECTION REGISTER (ADDRESS: 95h) U-0 U-0 R/W-1 R/W-1 U-0 R/W-1 R/W-1 R/W-1 — — WDA5 WDA4 — WDA2 WDA1 WDA0 bit 7 bit 0 bit 7-6 Unimplemented: Read as ‘0’ bit 5-4 WDA<5:4>: Pull-up/Pull-down Selection bits 1 = Pull-up selected 0 = Pull-down selected bit 3 Unimplemented: Read as ‘0’ bit 2-0 WDA<2:0>: Pull-up/Pull-down Selection bits 1 = Pull-up selected 0 = Pull-down selected Note 1: The weak pull-up/pull-down device is enabled only when the global RAPU bit is enabled, the pin is in Input mode (TRIS = 1), the individual WDA bit is enabled (WDA = 1) and the pin is not configured as an analog input or clock function. 2: RA3 pull-up is enabled when the pin is configured as MCLR in the Configuration Word register and the device is not in Programming mode. Legend: R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ - n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown U-0 U-0 R/W-1 R/W-1 U-0 R/W-1 R/W-1 R/W-1 — — WPUDA5(3) WPUDA4(3) — WPUDA2 WPUDA1 WPUDA0 bit 7 bit 0 bit 7-6 Unimplemented: Read as ‘0’ bit 5-4 WPUDA<5:4>: Pull-up/Pull-down Direction Selection bits(3) 1 = Pull-up/pull-down enabled 0 = Pull-up/pull-down disabled bit 3 Unimplemented: Read as ‘0’ bit 2-0 WPUDA<2:0>: Pull-up/Pull-down Direction Selection bits 1 = Pull-up/pull-down enabled 0 = Pull-up/pull-down disabled Note 1: The weak pull-up/pull-down direction device is enabled only when the global RAPU bit is enabled, the pin is in Input mode (TRIS = 1), the individual WPUDA bit is enabled (WPUDA = 1) and the pin is not configured as an analog input or clock function. 2: RA3 pull-up is enabled when the pin is configured as MCLR in the Configuration Word register and the device is not in Programming mode. 3: WPUDA5 bit can be written if INTOSC is enabled and T1OSC is disabled; otherwise, the bit can not be written and reads as ‘1’. WPUDA4 bit can be written if not configured as OSC2; otherwise, the bit can not be written and reads as ‘1’. Legend: R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ - n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown |
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