PIC16F636-E/ST Microchip Technology, PIC16F636-E/ST Datasheet - Page 78

• Manufacturer Part Number: PIC16F636-E/ST
• Description: IC MCU FLASH 2KX14 14TSSOP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F636-E/ST

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, LVD, POR, WDT
• Number Of I /o: 11
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 14-TSSOP
• For Use With: AC162057 - MPLAB ICD 2 HEADER 14DIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -

PIC12F635/PIC16F636/639
7.4
The CMCON0 register (Register 7-1) provides access
to the following comparator features:
• Mode selection
• Output state
• Output polarity
• Input switch
7.4.1
Each comparator state can always be read internally
via the CxOUT bit of the CMCON0 register. The com-
parator state may also be directed to the CxOUT pin in
the following modes:
PIC12F635
• CM<2:0> = 001
• CM<2:0> = 011
• CM<2:0> = 101
PIC16F636/639
• CM<2:0> = 110
When one of the above modes is selected, the
associated TRIS bit of the CxOUT pin must be cleared.
7.4.2
Inverting the output of a comparator is functionally
equivalent to swapping the comparator inputs. The
polarity of a comparator output can be inverted by set-
ting the C
C
table showing the output state versus input conditions
and the polarity bit is shown in Table 7-1.
TABLE 7-1:
DS41232D-page 76
X
Note:
INV results in a non-inverted output. A complete
Input Conditions
V
V
V
V
IN
IN
IN
IN
Comparator Control
X
- > V
- < V
- > V
- < V
INV bit of the CMCON0 register. Clearing
COMPARATOR OUTPUT STATE
COMPARATOR OUTPUT POLARITY
CxOUT refers to both the register bit and
output pin.
IN
IN
IN
IN
+
+
+
+
OUTPUT STATE VS. INPUT
CONDITIONS
CxINV
0
0
1
1
CxOUT
0
1
1
0
7.4.3
The inverting input of the comparators may be switched
between two analog pins in the following modes:
PIC12F635
• CM<2:0> = 101
• CM<2:0> = 110
PIC16F636/639
• CM<2:0> = 001 (Comparator C1 only)
• CM<2:0> = 010 (Comparators C1 and C2)
In the above modes, both pins remain in Analog mode
regardless of which pin is selected as the input. The
CIS bit of the CMCON0 register controls the comparator
input switch.
COMPARATOR INPUT SWITCH
© 2007 Microchip Technology Inc.