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PIC12F635-I/ST Datasheet(PDF) 54 Page - Microchip Technology

Part # PIC12F635-I/ST
Description  8/14-Pin, Flash-Based 8-Bit CMOS Microcontrollers with nanoWatt Technology
PDF  234 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC12F635-I/ST Datasheet(HTML) 54 Page - Microchip Technology

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PIC12F635/PIC16F636/639
DS41232D-page 52
© 2007 Microchip Technology Inc.
4.2.4
PIN DESCRIPTIONS AND
DIAGRAMS
Each PORTA pin is multiplexed with other functions. The
pins and their combined functions are briefly described
here. For specific information about individual functions,
such as the comparator, refer to the appropriate section
in this data sheet.
4.2.4.1
RA0/C1IN+/ICSPDAT/ULPWU
Figure 4-2 shows the diagram for this pin. The RA0 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™ data
• an analog input for the Ultra Low-Power Wake-up
FIGURE 4-1:
BLOCK DIAGRAM OF RA0
I/O pin
VDD
VSS
D
Q
CK
Q
D
Q
CK
Q
D
Q
CK
Q
D
Q
CK
Q
VDD
D
EN
Q
D
EN
Q
Weak
RD PORTA
RD
WR
WR
RD
WR
IOCA
RD
IOCA
Interrupt-on-
Analog
Input Mode(1)
Change
Q1
WR
RD
01
IULP
WPUDA
Data Bus
WPUDA
PORTA
TRISA
TRISA
PORTA
Note
1:
Comparator mode determines Analog Input mode.
VT
ULPWUE
–
+
VSS
D
Q
CK
Q
WR
RD
WDA
WDA
Analog
Input Mode(1)
RAPU
Weak



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