2006 Microchip Technology Inc.
Preliminary
DS70178C-page 193
dsPIC30F1010/202X
REGISTER 17-1:
COMPARATOR CONTROL REGISTERX (CMPCONx)
R/W-0
U-0
R/W-0
U-0
CMPON
CMPSIDL
bit 15
bit 8
R/W-0
U-0
R/W-0
U-0
R/W-0
INSEL<1:0>
EXTREF
CMPSTAT
CMPPOL
RANGE
bit 7
bit 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 15
CMPON: A/D Operating Mode bit
1
=
Comparator module is enabled
0
= Comparator module is disabled (reduces power consumption)
bit 14
Unimplemented: Read as ‘0’
bit 13
CMPSIDL: Stop in Idle Mode bit
1
=
Discontinue module operation when device enters Idle mode.
0
=
Continue module operation in Idle mode.
If a device has multiple comparators, any CMPSIDL bit set to ‘1’ disables ALL comparators while in
Idle mode.
bit 12-8
Reserved: Read as ‘0’
bit 7-6
INSEL<1:0>: Input Source Select for Comparator bits
00
= Select CMPxA input pin
01
= Select CMPxB input pin
10
= Select CMPxC input pin
11
= Select CMPxD input pin
bit 5
EXTREF: Enable External Reference bit
1
= External source provides reference to DAC
0
= Internal reference sources provide source to DAC
bit 4
Reserved: Read as ‘0’
bit 3
CMPSTAT: Current State of Comparator Output Including CMPPOL Selection bit
bit 2
Reserved: Read as ‘0’
bit 1
CMPPOL: Comparator Output Polarity Control bit
1
= Output is inverted
0
= Output is non inverted
bit 0
RANGE: Selects DAC Output Voltage Range bit
1
= High Range: Max DAC value = AVDD / 2, 2.5V @ 5 volt VDD
0
= Low Range: Max DAC value = INTREF, 1.2V ±1%
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