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DVR 数据表(PDF) 315 Page - Microchip Technology |
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DVR 数据表(HTML) 315 Page - Microchip Technology |
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315 / 416 page  2016-2018 Microchip Technology Inc. DS30010118D-page 315 PIC24FJ256GA705 FAMILY 26.0 COMPARATOR VOLTAGE REFERENCE 26.1 Configuring the Comparator Voltage Reference The voltage reference module is controlled through the CVRCON register (Register 26-1). The comparator voltage reference provides two ranges of output voltage, each with 16 distinct levels. The primary differ- ence between the ranges is the size of the steps selected by the CVREF Value Selection bits (CVR<4:0>), with one range offering finer resolution. The comparator reference supply voltage can come from either VDD and VSS, or the external VREF+ and VREF-. The voltage source is selected by the CVRSS bit (CVRCON<5>). The settling time of the comparator voltage reference must be considered when changing the CVREF output. FIGURE 26-1: COMPARATOR VOLTAGE REFERENCE BLOCK DIAGRAM Note: This data sheet summarizes the features of this group of PIC24F devices. It is not intended to be a comprehensive reference source. For more information, refer to the “dsPIC33/PIC24 Family Reference Man- ual”, “Dual Comparator Module” (DS39710), which is available from the Microchip website (www.microchip.com). The information in this data sheet supersedes the information in the FRM. CVR<4:0> R CVREN CVRSS = 0 AVDD CVREF+ CVRSS = 1 CVRSS = 0 CVREF- CVRSS = 1 R R R R R R 32 Steps CVREF AVSS CVROE CVREF Pin |
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