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| PIC16F819T-E Datasheet, PDF (53/176 Pages) Microchip Technology – 18/20-Pin Enhanced Flash Microcontrollers with nanoWatt Technology | |||
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PIC16F818/819
FIGURE 5-14:
BLOCK DIAGRAM OF RB6 PIN
RBPU(2)
Data Bus
WR
PORTB
WR
TRISB
Data Latch
DQ
CK
TRIS Latch
DQ
CK
T1OSCEN/ICD/
Program Mode
RD TRISB
Set RBIF
RD PORTB
From other
RB7:RB4 pins
T1CKI/PGC
From T1OSO Output
VDD
Weak
P Pull-up
I/O pin(1)
T1OSCEN
TTL
Input Buffer
Latch
QD
EN
Q1
QD
RD PORTB
EN
Q3
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.
 2004 Microchip Technology Inc.
DS39598E-page 51
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