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PIC12LF1501 数据表(PDF) 130 Page - Microchip Technology |
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PIC12LF1501 数据表(HTML) 130 Page - Microchip Technology |
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130 / 352 page  PIC16(L)F1503 DS40001607D-page 130 2011-2015 Microchip Technology Inc. 17.0 COMPARATOR MODULE Comparators are used to interface analog circuits to a digital circuit by comparing two analog voltages and providing a digital indication of their relative magnitudes. Comparators are very useful mixed signal building blocks because they provide analog functionality independent of program execution. The analog comparator module includes the following features: • Independent comparator control • Programmable input selection • Comparator output is available internally/externally • Programmable output polarity • Interrupt-on-change • Wake-up from Sleep • Programmable Speed/Power optimization •PWM shutdown • Programmable and fixed voltage reference 17.1 Comparator Overview A single comparator is shown in Figure 17-2 along with the relationship between the analog input levels and the digital output. When the analog voltage at VIN+ is less than the analog voltage at VIN-, the output of the comparator is a digital low level. When the analog voltage at VIN+ is greater than the analog voltage at VIN-, the output of the comparator is a digital high level. The comparators available for this device are listed in Table 17-1. FIGURE 17-1: COMPARATOR MODULE SIMPLIFIED BLOCK DIAGRAM TABLE 17-1: AVAILABLE COMPARATORS Device C1 C2 PIC16(L)F1503 ●● Rev. 10-000027A 8/5/2013 000 CxIN0- CxIN1- CxIN2- CxIN3- 00 01 10 11 CxIN+ FVR_buffer2 DAC_out + CxVN CxVP CxPCH<1:0> CxNCH<2:0> 2 3 CxON (1) CxON (1) CxON (1) CxSP CxHYS Interrupt Rising Edge Q1 CxINTP CxINTN CxOUT MCxOUT CxOUT_async DQ 0 1 CxSYNC set bit CxIF TRIS bit CxOUT CxOUT_sync to peripherals CxOE - Interrupt Falling Edge FVR_buffer2 CxPOL Cx (From Timer1 Module) T1CLK 001 010 011 100 DQ to peripherals |
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