PIC16F570 datasheet(62/129 Pages) MICROCHIP

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PIC16F570

DS40001684E-page 62

 2013-2014 Microchip Technology Inc.

10.9

CM1CON0: COMPARATOR C1 CONTROL REGISTER

R-1

R/W-1

C1OUT

C1OUTEN

C1POL

C1T0CS

C1ON

C1NREF

C1PREF

C1WU

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 7

C1OUT: Comparator Output bit

1 = VIN+ > VIN-

0 = VIN+ < VIN-

bit 6

C1OUTEN: Comparator Output Enable bit(1)

1 = Output of comparator is NOT placed on the C1OUT pin

0 = Output of comparator is placed in the C1OUT pin

bit 5

C1POL: Comparator Output Polarity bit

1 = Output of comparator is not inverted

0 = Output of comparator is inverted

bit 4

C1T0CS: Comparator TMR0 Clock Source bit

1 = TMR0 clock source selected by T0CS control bit

0 = Comparator output used as TMR0 clock source

bit 3

C1ON: Comparator Enable bit

1 = Comparator is on

0 = Comparator is off

bit 2

C1NREF: Comparator Negative Reference Select bit(2)

1 = C1IN- pin

0 = 0.6V Fixed Input Reference (VFIR)

bit 1

C1PREF: Comparator Positive Reference Select bit(2)

1 = C1IN+ pin

0 = C1IN- pin

bit 0

C1WU: Comparator Wake-up On Change Enable bit(3)

1 = Wake-up On Comparator Change is disabled

0 = Wake-up On Comparator Change is enabled

Note 1: Overrides TRIS control of the port.

2: When this bit selects an I/O pin and the comparator is turned on, this feature will override the TRIS and

ANSEL settings to make the respective pin an analog input. The value in the ANSEL register, however, is

not over-written. When the comparator is turned off, the respective pin will revert back to the original TRIS

and ANSEL settings.

3: The C1WU bit must be set to enable the CWIF function. See the INTCON0 register (Register 8-2) for more

information.

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