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PIC12F683 Datasheet(PDF) 51 Page - Microchip Technology |
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PIC12F683 Datasheet(HTML) 51 Page - Microchip Technology |
51 / 148 page 2004 Microchip Technology Inc. Preliminary DS41211B-page 49 PIC12F683 8.3 Comparator Configuration There are eight modes of operation for the comparator. The CMCON0 register is used to select these modes. Figure 8-3 shows the eight possible modes. If the Comparator mode is changed, the comparator output level may not be valid for the specified mode change delay shown in Section 15.0 “Electrical Specifications”. FIGURE 8-3: COMPARATOR I/O OPERATING MODES Note: Comparator interrupts should be disabled during a Comparator mode change. Otherwise, a false interrupt may occur. Comparator Reset (POR Default Value – Low Power) Comparator Off (Lowest Power) CM<2:0> = 000 CM<2:0> = 111 Comparator without Output Comparator w/o Output and with Internal Reference CM<2:0> = 010 CM<2:0> = 100 Comparator with Output and Internal Reference Multiplexed Input with Internal Reference and Output CM<2:0> = 011 CM<2:0> = 101 Comparator with Output Multiplexed Input with Internal Reference CM<2:0> = 001 CM<2:0> = 110 Legend: A = Analog Input, ports always read ‘0’ CIS = Comparator Input Switch (CMCON0<3>) D = Digital Input GP1/CIN- GP0/CIN+ Off (Read as ‘0’) A A GP2/COUT D GP1/CIN- GP0/CIN+ Off (Read as ‘0’) D D GP2/COUT D GP1/CIN- GP0/CIN+ COUT A A GP2/COUT D GP1/CIN- GP0/CIN+ COUT A D GP2/COUT D From CVREF Module GP1/CIN- GP0/CIN+ COUT A D GP2/COUT D From CVREF Module GP1/CIN- GP0/CIN+ COUT A A GP2/COUT D From CVREF Module CIS = 0 CIS = 1 GP1/CIN- GP0/CIN+ COUT A A GP2/COUT D GP1/CIN- GP0/CIN+ COUT A A GP2/COUT D From CVREF Module CIS = 0 CIS = 1 |
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