PIC16F628-20P Datasheet, PDF (40/170 Pages) Microchip Technology – FLASH-Based 8-Bit CMOS Microcontroller

PIC16F62X
FIGURE 5-13:
RBPU
BLOCK DIAGRAM OF RB5 PIN
Data Bus
WR PORTB
WR TRISB
RD TRISB
D
Q
CK Q
Data Latch
D
Q
CK Q
TRIS Latch
RD PORTB
Set RBIF
From other
RB<7:4> pins
Q
D
EN
Q
D
EN
VDD
P
weak
pull-up
VDD
RB5 pin
VSS
TTL
input
buffer
Q1
Q3
DS40300C-page 38
Preliminary
 2003 Microchip Technology Inc.