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PIC16F720-E/SS データシート(PDF) 48 Page - Microchip Technology |
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PIC16F720-E/SS データシート(HTML) 48 Page - Microchip Technology |
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48 / 244 page  PIC16F/LF720/721 DS41430A-page 48 2010 Microchip Technology Inc. REGISTER 6-1: PORTA: PORTA REGISTER U-0 U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x — — RA5 RA4 RA3(1) RA2 RA1 RA0 bit 7 bit 0 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 bit 7-6 Unimplemented: Read as ‘0’ bit 5-0 RA<5:0>: PORTA I/O Pin bit 1 = Port pin is > VIH 0 = Port pin is < VIL Note 1: PORTA<3> is input only. REGISTER 6-2: TRISA: PORTA TRI-STATE REGISTER U-0 U-0 R/W-1 R/W-1 U-1 R/W-1 R/W-1 R/W-1 — — TRISA5 TRISA4 —(1) TRISA2 TRISA1 TRISA0 bit 7 bit 0 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 bit 7-6 Unimplemented: Read as ‘0’ bit 5-0 TRISA<5:0>: PORTA Tri-State Control bit 1 = PORTA pin configured as an input (tri-stated) 0 = PORTA pin configured as an output Note 1: TRISA<3> is unimplemented and read as 1. REGISTER 6-3: WPUA: WEAK PULL-UP PORTA REGISTER U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 — —WPUA5 WPUA4 WPUA3(2) WPUA2 WPUA1 WPUA0 bit 7 bit 0 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 bit 7-6 Unimplemented: Read as ‘0’ bit 5-0 WPUA<5:0>: Weak Pull-up PORTA Control bits 1 = Weak pull-up enabled( 1) 0 = Weak pull-up disabled Note 1: Enabling weak pull-ups also requires that the RABPU bit of the OPTION register be cleared. 2: If MCLREN = 1, WPUA3 is always enabled. |
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