PIC18F248-E/L MICROCHIP [Microchip Technology], PIC18F248-E/L Datasheet - Page 99

• Manufacturer Part Number: PIC18F248-E/L
• Description: 28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module
• Manufacturer: MICROCHIP [Microchip Technology]

FIGURE 9-4:
© 2006 Microchip Technology Inc.
Note 1: I/O pins have diode protection to V
RBPU
Data Bus
WR LATB
or
WR PORTB
WR TRISB
RD TRISB
RD LATB
RBx/INTx
RD PORTB
Set RBIF
From other
RB7:RB4 pins
2: To enable weak pull-ups, set the appropriate TRIS
(2)
bit(s) and clear the RBPU bit (INTCON2 register).
Data Latch
TRIS Latch
D
D
CK
CK
RB7:RB4 PINS BLOCK
DIAGRAM
Q
Q
Q
Q
Latch
EN
EN
D
TTL
Input
Buffer
D
DD
and V
V
P
DD
Weak
Pull-up
I/O pin
SS
Buffer
.
Q1
Q3
ST
(1)
FIGURE 9-5:
Note 1: I/O pins have diode protection to V
RBPU
Data Bus
WR TRIS
RD TRIS
RD Port
RBx/INTx
WR Port
2: To enable weak pull-ups, set the appropriate TRIS
(2)
bit(s) and clear the RBPU bit (INTCON2 register).
TRIS Latch
Data Latch
D
D
CK
CK
RB1:RB0 PINS BLOCK
DIAGRAM
Q
Q
PIC18FXX8
Q
Schmitt Trigger
Buffer
EN
DS41159E-page 97
D
DD
TTL
Input
Buffer
and V
V
P
DD
SS
Weak
Pull-up
I/O pin
.
(1)