PIC16F721-ESS 查看數據表（PDF） - Microchip Technology
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PIC16F721-ESS Datasheet PDF : 254 Pages
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PIC16(L)F720/721
FIGURE 6-3:
BLOCK DIAGRAM OF RA2
Data Bus
DQ
Analog(1)
Input mode
WR
WPUA
CK Q
RD
WPUA
RABPU
VDD
Weak
To Voltage Regulator
(for PIC16F720/721 only)
WR
PORTA
DQ
CK Q
WR
TRISA
DQ
CK Q
RD
TRISA
RD
PORTA
DQ
WR
IOCA
CK Q
RD
IOCA
Interrupt-on-
Change
VDD
I/O Pin
VSS
Analog(1)
Input mode
QD
EN
Q3
QD
EN
RD PORTA
To Timer0
To INT
To A/D Converter
Note 1: ANSEL determines Analog Input mode.
2010-2013 Microchip Technology Inc.
DS41430D-page 51
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