PIC12F635-E/MD MICROCHIP [Microchip Technology], PIC12F635-E/MD Datasheet - Page 55

• Manufacturer Part Number: PIC12F635-E/MD
• Description: 8/14-Pin, Flash-Based 8-Bit CMOS Microcontrollers with nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

4.2.4.2
Figure 4-2 shows the diagram for this pin. The RA1 pin
is configurable to function as one of the following:
• a general purpose I/O
• an analog input to the comparator
• In-Circuit Serial Programming™ clock
FIGURE 4-2:
© 2007 Microchip Technology Inc.
Data Bus
WPUDA
WPUDA
PORTA
PORTA
TRISA
TRISA
Note 1:
WDA
WDA
IOCA
IOCA
Interrupt-on-
WR
WR
WR
WR
WR
RD
RD
RD
RD
RD
change
D
D
D
D
D
To Comparator
CK
CK
CK
CK
CK
Comparator mode determines Analog Input mode.
RA1/C1IN-/V
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Input Mode
BLOCK DIAGRAM OF RA1
Analog
RD PORTA
REF
RAPU
Input Mode
(1)
Analog
/ICSPCLK
Q
Q
EN
EN
(1)
D
D
V
V
DD
SS
V
V
DD
SS
Weak
Weak
I/O pin
Q1
PIC12F635/PIC16F636/639
4.2.4.3
Figure 4-3 shows the diagram for this pin. The RA2 pin
is configurable to function as one of the following:
• a general purpose I/O
• the clock input for Timer0
• an external edge-triggered interrupt
• a digital output from the comparator
FIGURE 4-3:
Data Bus
WPUDA
WPUDA
PORTA
PORTA
TRISA
TRISA
WDA
WDA
IOCA
IOCA
Interrupt-on-
WR
WR
WR
WR
WR
RD
RD
RD
RD
RD
change
D
D
D
D
D
To Timer0
To INT
CK
CK
CK
CK
CK
RA2/T0CKI/INT/C1OUT
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
BLOCK DIAGRAM OF RA2
C1OUT
C1OUT
Enable
RAPU
RD PORTA
Q
Q
1
0
DS41232D-page 53
EN
EN
D
D
V
V
DD
V
SS
V
DD
SS
Weak
Weak
I/O pin
Q1