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PIC16F684-E/ST датащи(PDF) 39 Page - Microchip Technology

номер детали PIC16F684-E/ST
подробное описание детали  14-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology
PDF  164 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC16F684-E/ST датащи(HTML) 39 Page - Microchip Technology

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 2004 Microchip Technology Inc.
Preliminary
DS41202C-page 37
PIC16F684
4.2.4.3
RA2/AN2/T0CKI/INT/C1OUT
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
• an analog input for the A/D
• the clock input for TMR0
• an external edge triggered interrupt
• a digital output from comparator 1
FIGURE 4-3:
BLOCK DIAGRAM OF RA2
4.2.4.4
RA3/MCLR/VPP
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
FIGURE 4-4:
BLOCK DIAGRAM OF RA3
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
Analog(1)
Input Mode
Data Bus
WR
WPUA
RD
WPUA
RD
PORTA
WR
PORTA
WR
TRISA
RD
TRISA
WR
IOCA
RD
IOCA
To A/D Converter
0
1
COUT
COUT 1
Enable
To INT
To TMR0
Analog(1)
Input Mode
RAPU
RD PORTA
Interrupt-on-
Change
Q3
Note
1:
Analog Input mode is generated by ANSEL.
Input
VSS
D
Q
CK
Q
D
EN
Q
Data Bus
RD PORTA
RD
PORTA
WR
IOCA
RD
IOCA
Reset
MCLRE
RD
TRISA
VSS
D
EN
Q
MCLRE
VDD
Weak
MCLRE
Interrupt-on-
Change
pin
Q3



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