PIC18F1220 MICROCHIP [Microchip Technology], PIC18F1220 Datasheet - Page 97

• Manufacturer Part Number: PIC18F1220
• Description: 18/20/28-Pin High-Performance, Enhanced Flash Microcontrollers with 10-bit A/D and nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

FIGURE 10-12:
 2004 Microchip Technology Inc.
Note 1:
Set RBIF
RB7:RB5 in Serial Programming Mode
RBPU
Data Bus
or PORTB
WR TRISB
RD TRISB
RD LATB
RD PORTB
WR LATB
BLOCK DIAGRAM OF RB5/PGM/KBI1 PIN
RB7:RB5 and
From other
RB4 pins
2:
(2)
I/O pins have diode protection to V
To enable weak pull-ups, set the appropriate TRIS bit(s) and clear the RBPU bit
(INTCON2<7>).
TRIS Latch
Data Latch
D
D
CK
CK
Q
Q
DD
and V
Q
Q
Latch
SS
.
EN
EN
D
D
TTL
Input
Buffer
PIC18F1220/1320
V
P
DD
Weak
Pull-up
RD PORTB
Q1
Q3
I/O pin
Buffer
ST
(1)
DS39605C-page 95