PIC16LC622AT-04/SO View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16LC622AT-04/SO

EPROM-Based 8-Bit CMOS Microcontrollers

Microchip Technology 

PIC16C62X

7.0 COMPARATOR MODULE

The comparator module contains two analog

comparators. The inputs to the comparators are

multiplexed with the RA0 through RA3 pins. The On-

Chip Voltage Reference (Section 8.0) can also be an

input to the comparators.

The CMCON register, shown in Register 7-1, controls

the comparator input and output multiplexers. A block

diagram of the comparator is shown in Figure 7-1.

REGISTER 7-1:

CMCON REGISTER (ADDRESS 1Fh)

R-0

R-0

U-0

U-0

C2OUT C1OUT

—

—

bit 7

R/W-0

CIS

R/W-0

CM2

R/W-0

CM1

R/W-0

CM0

bit 0

bit 7

bit 6

bit 5-4

bit 3

bit 2-0

C2OUT: Comparator 2 output

1 = C2 VIN+ > C2 VIN-

0 = C2 VIN+ < C2 VIN-

C1OUT: Comparator 1 output

1 = C1 VIN+ > C1 VIN-

0 = C1 VIN+ < C1 VIN-

Unimplemented: Read as ‘0’

CIS: Comparator Input Switch

When CM<2:0>: = 001:

1 = C1 VIN- connects to RA3

0 = C1 VIN- connects to RA0

When CM<2:0> = 010:

1 = C1 VIN- connects to RA3

C2 VIN- connects to RA2

0 = C1 VIN- connects to RA0

C2 VIN- connects to RA1

CM<2:0>: Comparator mode.

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.

DS30235J-page 37

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