PIC12F639 Microchip Technology, PIC12F639 Datasheet - Page 48
PIC12F639
Manufacturer Part Number
PIC12F639
Description
(PIC12F635 / PIC12F636 / PIC12F639) 8/14-PIN FLASH-BASED / 8-BIT CMOS MICROCONTROLLERS WITH NANOWATT TECHNOLOGY
Manufacturer
Microchip Technology
Datasheet
1.PIC12F639.pdf
(196 pages)
- Current page: 48 of 196
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PIC12F635/PIC16F636/639
4.2.4.4
Figure 4-4 shows the diagram for this pin. The RA3 pin
is configurable to function as one of the following:
• a general purpose input
• as Master Clear Reset with weak pull-up
• a high-voltage detect for Program mode entry
FIGURE 4-4:
DS41232B-page 46
RA3/MCLR/V
Interrupt-on-
BLOCK DIAGRAM OF RA3
change
PP
Data Bus
PORTA
IOCA
TRISA
WR
RD
RD
RD
IOCA
D
CK
Q
Q
Program
Mode
Preliminary
V
SS
Reset
MCLRE
HV Detect
WURE
Sleep
RD PORTA
MCLRE
Q
Q
MCLRE
EN
EN
D
D
V
DD
Weak
Q3
V
SS
Input
© 2005 Microchip Technology Inc.
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