PIC18F1220 MICROCHIP [Microchip Technology], PIC18F1220 Datasheet - Page 99

• 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 10-14:
 2004 Microchip Technology Inc.
Note 1:
ECCP1 P1C/D Enable
RBPU
P1B/D Tri-State Auto-Shutdown
P1D Data
WR LATB or
WR TRISB
T1OSCEN
2:
Data Bus
(2)
PORTB
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>).
Set RBIF
PGD
From other
RB7:RB4 pins
BLOCK DIAGRAM OF RB7/PGD/T1OSI/P1D/KBI3 PIN
TRIS Latch
RD PORTB
Data Latch
D
D
RD LATB
RD TRISB
CK
CK
Q
Q
Q
Q
DD
Q
and V
EN
SS
D
.
1
0
RD PORTB
Q
EN
Q3
D
TTL
Input
Buffer
PIC18F1220/1320
V
P
DD
Weak
Pull-up
Q1
Schmitt
Trigger
To RB6 pin
DS39605C-page 97
RB7 pin