PIC18F2331 MICROCHIP [Microchip Technology], PIC18F2331 Datasheet - Page 116

• Manufacturer Part Number: PIC18F2331
• Description: 28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High Performance PWM and A/D
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F2331/2431/4331/4431
FIGURE 10-10:
DS39616B-page 114
RBPU
Note 1: To enable weak pull-ups, set the appropriate TRIS bit(s) and clear the RBPU bit (INTCON2<7>).
PORT/PWM Select
(1)
PWM5 Data
RD PORTB
WR TRISB
WR LATB
Data Bus
PORTB
Set RBIF
From other
RB7:RB4 pins
BLOCK DIAGRAM OF RB4
or
TRIS Latch
Data Latch
D
D
RD LATB
RD TRISB
CK
CK
RD LATC
Q
Q
Q
Q
Q
Preliminary
EN
D
0
1
RD PORTB
Q
Q3
EN
D
V
V
N
P
SS
DD
Q1
TTL
Input
Buffer
V
P
 2003 Microchip Technology Inc.
DD
Weak
Pull-up
RB4 Pin