12F629 Microchip Technology, Inc., 12F629 Datasheet - Page 37

• Manufacturer Part Number: 12F629
• Description: 8-pin Flash-based 8-bit CMOS Microcontrollers
• Manufacturer: Microchip Technology, Inc.

6.0
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
REGISTER 6-1:
 2003 Microchip Technology Inc.
COMPARATOR MODULE
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2-0
CMCON — COMPARATOR CONTROL REGISTER (ADDRESS: 19h)
bit 7
Unimplemented: Read as ‘0’
COUT: Comparator Output bit
When CINV = 0:
1 = V
0 = V
When CINV = 1:
1 = V
0 = V
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 = V
0 = V
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
U-0
—
IN
IN
IN
IN
IN
IN
+ > V
+ < V
+ < V
+ > V
- connects to CIN+
- connects to CIN-
IN
IN
IN
IN
COUT
-
-
-
-
R-0
U-0
—
W = Writable bit
’1’ = Bit is set
R/W-0
CINV
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.
R/W-0
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
CIS
PIC12F629/675
R/W-0
CM2
x = Bit is unknown
R/W-0
CM1
DS41190C-page 35
R/W-0
CM0
bit 0