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PIC16F753 数据表(PDF) 43 Page - Microchip Technology |
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PIC16F753 数据表(HTML) 43 Page - Microchip Technology |
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43 / 230 page  2013-2015 Microchip Technology Inc. DS40001709C-page 43 PIC16F753/HV753 5.5 Register Definitions: PORTA Control REGISTER 5-2: PORTA: PORTA REGISTER U-0 U-0 R/W-x/u R/W-x/u R-x/x R/W-x/u R/W-x/u R/W-x/u — — RA5 RA4 RA3 RA2 RA1 RA0 bit 7 bit 0 Legend: R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ u = Bit is unchanged x = Bit is unknown -n/n = Value at POR and BOR/Value at all other Resets ‘1’ = Bit is set ‘0’ = Bit is cleared bit 7-6 Unimplemented: Read as ‘0’ bit 5-0 RA<5:0>: PORTA I/O Value bits(1) 1 = Port pin is > VIH 0 = Port pin is < VIL Note 1: Writes to PORTA are actually written to corresponding LATA register. Reads from PORTA register is return of actual I/O pin values. REGISTER 5-3: TRISA: PORTA TRI-STATE REGISTER U-0 U-0 R/W-1/1 R/W-1/1 R-1/1 R/W-1/1 R/W-1/1 R/W-1/1 — — TRISA5 TRISA4 TRISA3(1) TRISA2 TRISA1 TRISA0 bit 7 bit 0 Legend: R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ u = Bit is unchanged x = Bit is unknown -n/n = Value at POR and BOR/Value at all other Resets ‘1’ = Bit is set ‘0’ = Bit is cleared bit 7-6 Unimplemented: Read as ‘0’ bit 5-0 TRISA<5:0>: PORTA Tri-State Control bits(1) 1 = PORTA pin configured as an input (tri-stated) 0 = PORTA pin configured as an output Note 1: TRISA3 always reads ‘1’. REGISTER 5-4: LATA: PORTA DATA LATCH REGISTER U-0 U-0 R/W-x/u R/W-x/u U-0 R/W-x/u R/W-x/u R/W-x/u — —LATA5 LATA4 — LATA2 LATA1 LATA0 bit 7 bit 0 Legend: R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ u = Bit is unchanged x = Bit is unknown -n/n = Value at POR and BOR/Value at all other Resets ‘1’ = Bit is set ‘0’ = Bit is cleared bit 7-6 Unimplemented: Read as ‘0’ bit 5-4 LATA<5:4>: PORTA Output Latch Value bits(1) bit 3 Unimplemented: Read as ‘0’ bit 2-0 LATA<2:0>: PORTA Output Latch Value bits(1) Note 1: Writes to PORTA are actually written to corresponding LATA register. Reads from PORTA register is return of actual I/O pin values. |
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