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PIC16F720-E/ML 数据表(PDF) 63 Page - Microchip Technology |
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PIC16F720-E/ML 数据表(HTML) 63 Page - Microchip Technology |
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63 / 244 page  2010 Microchip Technology Inc. DS41430A-page 63 PIC16F/LF720/721 REGISTER 6-12: TRISC: PORTC TRI-STATE REGISTER R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 TRISC7 TRISC6 TRISC5 TRISC4 TRISC3 TRISC2 TRISC1 TRISC0 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 7-0 TRISC<7:0>: PORTC Tri-State Control bits 1 = PORTC pin configured as an input (tri-stated) 0 = PORTC pin configured as an output REGISTER 6-13: ANSELC: ANALOG SELECT REGISTER FOR PORTC R/W-1 R/W-1 U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 ANSC7 ANSC6 — — ANSC3 ANSC2 ANSC1 ANSC0 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 ANSC<7:6>: Analog Select between Analog or Digital Function on Pins RB<7:6>, respectively 0 = Digital I/O. Pin is assigned to port or digital special function. 1 = Analog input. Pin is assigned as analog input(1). Digital input buffer disabled. bit 5-4 Unimplemented: Read as ‘0’ bit 3-0 ANSC<3:0>: Analog Select between Analog or Digital Function on Pins RC<3:0>, respectively 0 = Digital I/O. Pin is assigned to port or digital special function. 1 = Analog input. Pin is assigned as analog input(1). Digital input buffer disabled. Note 1: Setting a pin to an analog input automatically disables the digital input circuitry. Weak pull-ups, if available, are unaffected. The corresponding TRIS bit must be set to Input mode by the user in order to allow external control of the voltage on the pin. |
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