PIC16F627A_05 Datasheet, PDF (42/180 Pages) Microchip Technology – Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

PIC16F627A/628A/648A
FIGURE 5-13:
RBPU
BLOCK DIAGRAM OF RB5 PIN
Data Bus
WR PORTB
WR TRISB
D
Q
CK Q
Data Latch
D
Q
CK Q
TRIS Latch
RD TRISB
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
DS40044D-page 40
© 2005 Microchip Technology Inc.