Microchip Technology AC164337 Data Sheet

 2006-2014 Microchip Technology Inc.

DS70000178D-page 193

dsPIC30F1010/202X

REGISTER 17-1:

COMPARATOR CONTROL REGISTER

(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

= 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.

= 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

= Select CMPxB input pin

= Select CMPxC input pin

= Select CMPxD input pin

bit 5

EXTREF: Enable External Reference bit
1

= External source provides reference to DAC

= 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

= Output is non inverted

bit 0

RANGE: Selects DAC Output Voltage Range bit
1

= High Range: Max DAC value = AV

/2, 2.5V @ 5 volt V

= Low Range: Max DAC value = INTREF, 1.2V ±1%