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| PIC16F818_13 Datasheet, PDF (45/178 Pages) Microchip Technology – 18/20-Pin Enhanced Flash Microcontrollers with nanoWatt Technology | |||
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PIC16F818/819
FIGURE 5-8:
BLOCK DIAGRAM OF RB0 PIN
RBPU(2)
Data Bus
WR
PORTB
WR
TRISB
Data Latch
DQ
CK
TRIS Latch
DQ
CK
RD TRISB
VDD
Weak
P Pull-up
I/O pin(1)
TTL
Input
Buffer
RD PORTB
QD
EN
To INT0 or CCP
RD PORTB
Note 1: I/O pins have diode protection to VDD and VSS.
2: To enable weak pull-ups, set the appropriate TRIS bit(s) and clear the RBPU bit.
ï£ 2001-2013 Microchip Technology Inc.
DS39598F-page 45
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