PIC16F684-ISL

Manufacturer Part NumberPIC16F684-ISL
ManufacturerMicrochip Technology Inc.
PIC16F684-ISL datasheets
 


Specifications of PIC16F684-ISL

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Page 57/164

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8.0
COMPARATOR MODULE
The comparator module contains two analog
comparators. The inputs to the comparators are
multiplexed with I/O port pins RA0, RA1, RC0 and
RC1, while the outputs are multiplexed to pins RA2
and RC4. An on-chip Comparator Voltage Reference
(CV
) can also be applied to the inputs of the
REF
comparators.
REGISTER 8-1:
CMCON0 – COMPARATOR CONFIGURATION REGISTER (ADDRESS: 19h)
R-0
C2OUT
C1OUT
bit 7
bit 7
C2OUT: Comparator 2 Output bit
When C2INV = 0:
1 = C2 V
+ > C2 V
IN
0 = C2 V
+ < C2 V
IN
When C2INV = 1:
1 = C2 V
+ < C2 V
IN
0 = C2 V
+ > C2 V
IN
bit 6
C1OUT: Comparator 1 Output bit
When C1INV = 0:
1 = C1 V
+ > C1 V
IN
0 = C1 V
+ < C1 V
IN
When C1INV = 1:
1 = C1 V
+ < C1 V
IN
0 = C1 V
+ > C1 V
IN
bit 5
C2INV: Comparator 2 Output Inversion bit
1 = C2 output inverted
0 = C2 output not inverted
bit 4
C1INV: Comparator 1 Output Inversion bit
1 = C1 Output inverted
0 = C1 Output not inverted
bit 3
CIS: Comparator Input Switch bit
When CM<2:0> = 010:
1 = C1 V
- connects to RA0/AN0
IN
C2 V
- connects to RC0/AN4
IN
0 = C1 V
- connects to RA1/AN1
IN
C2 V
- connects to RC1/AN5
IN
When CM<2:0> = 001:
1 = C1 V
- connects to RA0/AN0
IN
0 = C1 V
- connects to RA1/AN1
IN
bit 2-0
CM<2:0>: Comparator Mode bits
Figure 8-3 shows the Comparator modes and CM<2:0> bit settings
Legend:
R = Readable bit
-n = Value at POR
 2004 Microchip Technology Inc.
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.
R-0
R/W-0
R/W-0
R/W-0
C2INV
C1INV
CIS
-
IN
-
IN
-
IN
-
IN
-
IN
-
IN
-
IN
-
IN
W = Writable bit
U = Unimplemented bit, read as ‘0’
‘1’ = Bit is set
‘0’ = Bit is cleared
Preliminary
PIC16F684
R/W-0
R/W-0
R/W-0
CM2
CM1
CM0
bit 0
x = Bit is unknown
DS41202C-page 55