PIC18F2331_07 Datasheet, PDF (118/400 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High Performance PWM and A/D

PIC18F2331/2431/4331/4431
FIGURE 10-10: BLOCK DIAGRAM OF RB4
RBPU⁽¹⁾
PORT/PWM Select
PWM5 Data
0
RD LATB
1
Data Bus
WR LATB
or PORTB
D
Q
CK Q
Data Latch
WR TRISB
D
Q
CK Q
TRIS Latch
RD TRISB
RD LATB
RD PORTB
Q
D
EN
Set RBIF
From other
RB7:RB4 pins
Q
D
RD PORTB
EN
Q3
VDD
Weak
P _Pull-up
VDD
P
N
VSS
TTL
Input
Buffer
Q1
RB4 Pin
Note 1: To enable weak pull-ups, set the appropriate TRIS bit(s) and clear the RBPU bit (INTCON2<7>).
DS39616C-page 116
Preliminary
© 2007 Microchip Technology Inc.