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PIC12F683 Datasheet(PDF) 49 Page - Microchip Technology

Part # PIC12F683
Description  8-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC12F683 Datasheet(HTML) 49 Page - Microchip Technology

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 2004 Microchip Technology Inc.
Preliminary
DS41211B-page 47
PIC12F683
8.0
COMPARATOR MODULE
The comparator module contains one analog com-
parator. The inputs to the comparator are multiplexed
with I/O port pins, GP0 and GP1, while the outputs are
multiplexed to GP2. An on-chip Comparator Voltage
Reference (CVREF) can also be applied to the inputs of
the comparator.
The CMCON0 register (Register 8-1) controls the
comparator input and output multiplexers. A block
diagram of the various comparator configurations is
shown in Figure 8-3.
REGISTER 8-1:
CMCON0 – COMPARATOR CONTROL REGISTER 0 (ADDRESS: 19h)
U-0
R-0
U-0
R/W-0
R/W-0
R/W-0
R/W-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:
1
= VIN+ > VIN-
0
= VIN+ < VIN-
When CINV = 1:
1
= VIN+ < VIN-
0
= VIN+ > VIN-
bit 5
Unimplemented: Read as ‘0’
bit 4
CINV: Comparator Output Inversion bit
1
= Output inverted
0
= Output not inverted
bit 3
CIS: Comparator Input Switch bit
When CM<2:0> = 110 or 101:
1
= VIN- connects to CIN+
0
= VIN- connects to CIN-
bit 2
CM<2:0>: Comparator Mode bits
Figure 8-3 shows the Comparator modes and CM<2:0> 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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