PIC12F629-I View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC12F629-I

8-Pin FLASH-Based 8-Bit CMOS Microcontrollers

Microchip Technology 

PIC12F629/675

6.0 COMPARATOR MODULE

The PIC12F629/675 devices have one analog

comparator. The inputs to the comparator are

multiplexed with the GP0 and GP1 pins. There is an

on-chip Comparator Voltage Reference that can also

be applied to an input of the comparator. In addition,

GP2 can be configured as the comparator output.

The Comparator Control Register (CMCON), shown

in Register 6-1, contains the bits to control the

comparator.

REGISTER 6-1:

CMCON — COMPARATOR CONTROL REGISTER (ADDRESS: 19h)

U-0

R-0

U-0

R/W-0 R/W-0 R/W-0 R/W-0

—

COUT

—

CINV

CIS

CM2

CM1

bit 7

R/W-0

CM0

bit 0

bit 7

bit 6

bit 5

bit 4

bit 3

bit 2-0

Unimplemented: Read as ‘0’

COUT: Comparator Output bit

When CINV = 0:

1 = VIN+ > VIN-

0 = VIN+ < VIN-

When CINV = 1:

1 = VIN+ < VIN-

0 = VIN+ > VIN-

Unimplemented: Read as ‘0’

CINV: Comparator Output Inversion bit

1 = Output inverted

0 = Output not inverted

CIS: Comparator Input Switch bit

When CM2:CM0 = 110 or 101:

1 = VIN- connects to CIN+

0 = VIN- connects to CIN-

CM2:CM0: Comparator Mode bits

Figure 6-2 shows the Comparator modes and CM2:CM0 bit settings

Legend:

R = Readable bit

- n = Value at POR

W = Writable bit

’1’ = Bit is set

U = Unimplemented bit, read as ‘0’

’0’ = Bit is cleared x = Bit is unknown

 2003 Microchip Technology Inc.

DS41190C-page 35

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