PIC16F676-ESLASHST datasheet(39/130 Pages) MICROCHIP

39 / 130 page

DS40039E-page 37

PIC16F630/676

6.0

COMPARATOR MODULE

The PIC16F630/676 devices have one analog compar-

ator. The inputs to the comparator are multiplexed with

the RA0 and RA1 pins. There is an on-chip Comparator

Voltage Reference that can also be applied to an input

of the comparator. In addition, RA2 can be configured

as the comparator output. The Comparator Control

the bits to control the comparator.

CMCON — COMPARATOR CONTROL REGISTER (ADDRESS: 19h)

U-0

R-0

U-0

R/W-0

—COUT

—

CINV

CIS

CM2

CM1

CM0

bit 7

bit 0

bit 7

Unimplemented: Read as ‘0’

bit 6

COUT: Comparator Output bit

When CINV = 0:

= VIN+ > VIN-

= VIN+ < VIN-

When CINV = 1:

= VIN+ < VIN-

= VIN+ > VIN-

bit 5

Unimplemented: Read as ‘0’

bit 4

CINV: Comparator Output Inversion bit

= Output inverted

= Output not inverted

bit 3

CIS: Comparator Input Switch bit

When CM2:CM0 = 110 or 101:

= VIN- connects to CIN+

= VIN- connects to CIN-

bit 2-0

CM2:CM0: Comparator Mode bits

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

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

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