DSPIC33FJ64GS406 datasheet(343/456 Pages) MICROCHIP

343 / 456 page

 2009-2012 Microchip Technology Inc.

DS70591E-page 343

dsPIC33FJ32GS406/606/608/610 and dsPIC33FJ64GS406/606/608/610

CMPCONx: COMPARATOR CONTROL x REGISTER

R/W-0

U-0

R/W-0

U-0

R/W-0

CMPON

—

CMPSIDL

rDACOE

bit 15

bit 8

R/W-0

U-0

R/W-0

U-0

R/W-0

INSEL<1:0>

EXTREF

rCMPSTAT

CMPPOL

RANGE

bit 7

bit 0

Legend:

r = Reserved bit

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: Comparator 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: Comparator Stop in Idle Mode bit

1 = Discontinues module operation when device enters Idle mode.

0 = Continues 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 12-9

Reserved: Read as ‘0’

bit 8

DACOE: DAC Output Enable

1 = DAC analog voltage is output to DACOUT pin(1)

0 = DAC analog voltage is not connected to DACOUT pin

bit 7-6

INSEL<1:0>: Input Source Select for Comparator bits

11 = Selects CMPxD input pin

10 = Selects CMPxC input pin

01 = Selects CMPxB input pin

00 = Selects CMPxA input pin

bit 5

EXTREF: Enable External Reference bit

1 = External source provides reference to DAC (maximum DAC voltage determined by external

voltage source)

0 = Internal reference sources provide reference to DAC (maximum DAC voltage determined by

RANGE bit setting)

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, 1.65V at 3.3V AVDD

0 = Low Range: Max DAC Value = INTREF

Note 1: DACOUT can be associated only with a single comparator at any given time. The software must ensure

that multiple comparators do not enable the DAC output by setting their respective DACOE bit.

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