PIC32MX1XX Datasheet, PDF (216/320 Pages) Microchip Technology – 32-bit Microcontrollers (up to 128 KB Flash and 32 KB SRAM) with Audio and Graphics Interfaces, USB, and Advanced Analog

PIC32MX1XX/2XX
REGISTER 23-1: CVRCON: COMPARATOR VOLTAGE REFERENCE CONTROL REGISTER
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Range 31/23/15/7 30/22/14/6 29/21/13/5 28/20/12/4 27/19/11/3 26/18/10/2 25/17/9/1 24/16/8/0
31:24
23:16
15:8
7:0
U-0
—
U-0
—
R/W-0
ON⁽¹⁾
U-0
—
U-0
—
U-0
—
U-0
—
R/W-0
CVROE
U-0
—
U-0
—
U-0
—
R/W-0
CVRR
U-0
—
U-0
—
U-0
—
R/W-0
CVRSS
U-0
—
U-0
—
U-0
—
R/W-0
U-0
U-0
—
—
U-0
U-0
—
—
U-0
U-0
—
—
R/W-0
R/W-0
CVR<3:0>
U-0
—
U-0
—
U-0
—
R/W-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 31-16 Unimplemented: Read as ‘0’
bit 15 ON: Comparator Voltage Reference On bit⁽¹⁾
1 = Module is enabled
Setting this bit does not affect other bits in the register.
0 = Module is disabled and does not consume current.
Clearing this bit does not affect the other bits in the register.
bit 14-7 Unimplemented: Read as ‘0’
bit 6
CVROE: CVREFOUT Enable bit
1 = Voltage level is output on CVREFOUT pin
0 = Voltage level is disconnected from CVREFOUT pin
bit 5
CVRR: CVREF Range Selection bit
1 = 0 to 0.67 CVRSRC, with CVRSRC/24 step size
0 = 0.25 CVRSRC to 0.75 CVRSRC, with CVRSRC/32 step size
bit 4
CVRSS: CVREF Source Selection bit
1 = Comparator voltage reference source, CVRSRC = (VREF+) – (VREF-)
0 = Comparator voltage reference source, CVRSRC = AVDD – AVSS
bit 3-0 CVR<3:0>: CVREF Value Selection 0 ≤CVR<3:0> ≤15 bits
When CVRR = 1:
CVREF = (CVR<3:0>/24) • (CVRSRC)
When CVRR = 0:
CVREF = 1/4 • (CVRSRC) + (CVR<3:0>/32) • (CVRSRC)
Note 1: When using 1:1 PBCLK divisor, the user’s software should not read/write the peripheral’s SFRs in the
SYSCLK cycle immediately following the instruction that clears the module’s ON bit.
DS61168D-page 216
Preliminary
© 2011-2012 Microchip Technology Inc.