Datasheet

PIC32MX5XX/6XX/7XX
DS60001156H-page 332  2009-2013 Microchip Technology Inc.
25.1 Control Registers
REGISTER 25-1: CMxCON: COMPARATOR ‘x’ CONTROL REGISTER
Bit
Range
Bit
31/23/15/7
Bit
30/22/14/6
Bit
29/21/13/5
Bit
28/20/12/4
Bit
27/19/11/3
Bit
26/18/10/2
Bit
25/17/9/1
Bit
24/16/8/0
31:24
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
23:16
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
15:8
R/W-0 R/W-0 R/W-0 U-0 U-0 U-0 U-0 R-0
ON
(1)
COE CPOL
(2)
— — — —COUT
7:0
R/W-1 R/W-1 U-0 R/W-0 U-0 U-0 R/W-1 R/W-1
EVPOL<1:0> — CREF — — CCH<1:0>
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 31-16 Unimplemented: Read as ‘0’
bit 15 ON: Comparator ON bit
(1)
Clearing this bit does not affect the other bits in this register.
1 = Module is enabled. Setting this bit does not affect the other bits in this register
0 = Module is disabled and does not consume current.
bit 14 COE: Comparator Output Enable bit
1 = Comparator output is driven on the output CxOUT pin
0 = Comparator output is not driven on the output CxOUT pin
bit 13 CPOL: Comparator Output Inversion bit
(2)
1 = Output is inverted
0 = Output is not inverted
bit 12-9 Unimplemented: Read as ‘0’
bit 8 COUT: Comparator Output bit
1 = Output of the Comparator is a ‘1’
0 = Output of the Comparator is a ‘0’
bit 7-6 EVPOL<1:0>: Interrupt Event Polarity Select bits
11 = Comparator interrupt is generated on a low-to-high or high-to-low transition of the comparator output
10 = Comparator interrupt is generated on a high-to-low transition of the comparator output
01 = Comparator interrupt is generated on a low-to-high transition of the comparator output
00 = Comparator interrupt generation is disabled
bit 5 Unimplemented: Read as ‘0’
bit 4 CREF: Comparator Positive Input Configure bit
1 = Comparator non-inverting input is connected to the internal CV
REF
0 = Comparator non-inverting input is connected to the CXIN+ pin
bit 3-2 Unimplemented: Read as ‘0’
bit 1-0 CCH<1:0>: Comparator Negative Input Select bits for Comparator
11 = Comparator inverting input is connected to the IV
REF
10 = Comparator inverting input is connected to the C2IN+ pin for C1 and C1IN+ pin for C2
01 = Comparator inverting input is connected to the C1IN+ pin for C1 and C2IN+ pin for C2
00 = Comparator inverting input is connected to the C1IN- pin for C1 and C2IN- pin for C2
Note 1: When using the 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.
2: Setting this bit will invert the signal to the comparator interrupt generator as well. This will result in an
interrupt being generated on the opposite edge from the one selected by EVPOL<1:0>.