PIC24F16KA102_11 Datasheet, PDF (188/278 Pages) Microchip Technology – 20/28-Pin General Purpose, 16-Bit Flash Microcontrollers with nanoWatt XLP Technology

PIC24F16KA102 FAMILY
REGISTER 24-1: CVRCON: COMPARATOR VOLTAGE REFERENCE CONTROL REGISTER
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 15
bit 8
R/W-0
CVREN
bit 7
R/W-0
CVROE
R/W-0
CVRR
R/W-0
CVRSS
R/W-0
CVR3
R/W-0
CVR2
R/W-0
CVR1
R/W-0
CVR0
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-8
bit 7
bit 6
bit 5
bit 4
bit 3-0
Unimplemented: Read as ‘0’
CVREN: Comparator Voltage Reference Enable bit
1 = CVREF circuit is powered on
0 = CVREF circuit is powered down
CVROE: Comparator VREF Output Enable bit
1 = CVREF voltage level is output on CVREF pin
0 = CVREF voltage level is disconnected from CVREF pin
CVRR: Comparator VREF Range Selection bit
1 = CVRSRC range should be 0 to 0.625 CVRSRC with CVRSRC/24 step size
0 = CVRSRC range should be 0.25 to 0.719 CVRSRC with CVRSRC/32 step size
CVRSS: Comparator VREF Source Selection bit
1 = Comparator reference source, CVRSRC = VREF+ – VREF-
0 = Comparator reference source, CVRSRC = AVDD – AVSS
CVR3:CVR0: Comparator VREF Value Selection 0  CVR<3:0>  15 bits
When CVRR = 1 and CVRSS = 0:
CVREF = (CVR<3:0>/24) * (CVRSRC)
When CVRR = 0 and CVRSS = 0:
CVREF = 1/4 (CVRSRC) + (CVR<3:0>/32) * (CVRSRC)
When CVRR = 1 and CVRSS = 1:
CVREF = ((CVR<3:0>/24) * (CVRSRC)) + VREF-
When CVRR = 0 and CVRSS = 1:
CVREF = (1/4 (CVRSRC) + (CVR<3:0>/32) * (CVRSRC)) + VREF-
DS39927C-page 188
 2008-2011 Microchip Technology Inc.