PIC18F2331 Datasheet, PDF (115/396 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High Performance PWM and A/D

PIC18F2331/2431/4331/4431
FIGURE 10-9:
BLOCK DIAGRAM OF RB3:RB0 PINS
RBPU⁽¹⁾
PORT/PWM Select
PWM0,1,2, 3 Data
0
1
RD LATC
Data Bus
D
Q
WR LATB
or
PORTB
CK Q
Data Latch
WR TRISB
D
Q
CK Q
TRIS Latch
VDD
P
Weak
Pull-up
VDD
P
N
VSS
TTL
Input
Buffer
RB<3:0>
Pins
RD TRISB
Q
D
EN
RD PORTB
Note 1: To enable weak pull-ups, set the appropriate TRIS bit(s) and clear the RBPU bit (INTCON2<7>).
 2003 Microchip Technology Inc.
Preliminary
DS39616B-page 113