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PIC12F635ESL 数据表(PDF) 77 Page - Microchip Technology |
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PIC12F635ESL 数据表(HTML) 77 Page - Microchip Technology |
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77 / 234 page ![]() © 2007 Microchip Technology Inc. DS41232D-page 75 PIC12F635/PIC16F636/639 FIGURE 7-7: COMPARATOR I/O OPERATING MODES (PIC16F636/639) C1 C1IN- VIN- VIN+ C1IN+ Off(1) Comparators Reset (POR Default Value) A A CM<2:0> = 000 C2 C2IN- VIN- VIN+ C2IN+ Off(1) A A C1 C1IN- VIN- VIN+ C1IN+ C1OUT Two Independent Comparators A A CM<2:0> = 100 C2 C2IN- VIN- VIN+ C2IN+ C2OUT A A C1 C1IN- VIN- VIN+ C1IN+ C1OUT Two Common Reference Comparators A I/O CM<2:0> = 011 C2 C2IN- VIN- VIN+ C2IN+ C2OUT A A C1 C1IN- VIN- VIN+ C1IN+ Off(1) One Independent Comparator I/O I/O CM<2:0> = 101 C2 C2IN- VIN- VIN+ C2IN+ C2OUT A A C1 C1IN- VIN- VIN+ C1IN+ Off(1) Comparators Off (Lowest Power) I/O I/O CM<2:0> = 111 C2 C2IN- VIN- VIN+ C2IN+ Off(1) I/O I/O C1 C1IN- VIN- VIN+ C1IN+ C1OUT Four Inputs Multiplexed to Two Comparators A A CM<2:0> = 010 C2 C2IN- VIN- VIN+ C2IN+ C2OUT A A From CVREF Module CIS = 0 CIS = 1 CIS = 0 CIS = 1 C1 C1IN- VIN- VIN+ C1OUT(pin) C1OUT Two Common Reference Comparators with Outputs A D CM<2:0> = 110 C2 C2IN- VIN- VIN+ C2IN+ C2OUT A A C2OUT(pin) C1 C1IN- VIN- VIN+ C1IN+ C1OUT Three Inputs Multiplexed to Two Comparators A A CM<2:0> = 001 C2 C2IN- VIN- VIN+ C2IN+ C2OUT A A CIS = 0 CIS = 1 D Legend: A = Analog Input, ports always reads ‘0’ CIS = Comparator Input Switch (CMCON0<3>) I/O = Normal port I/O D = Comparator Digital Output Note 1: Reads as ‘0’, unless CxINV = 1. |
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