PIC16LF819-I Datasheet, PDF (52/176 Pages) Microchip Technology – Enhanced Flash Microcontrollers with nanoWatt Technology

PIC16F818/819
FIGURE 5-13:
BLOCK DIAGRAM OF RB5 PIN
RBPU⁽²⁾
Port/SSPEN
Data Bus
WR
PORTB
WR
TRISB
Data Latch
DQ
CK
TRIS Latch
DQ
CK
RD TRISB
RD PORTB
Set RBIF
From other
RB7:RB4 pins
SS
VDD
P
Weak
Pull-up
I/O pin⁽¹⁾
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.
DS39598E-page 50
 2004 Microchip Technology Inc.