PIC18F1220_07 Datasheet, PDF (99/308 Pages) Microchip Technology – 18/20/28-Pin High-Performance, Enhanced Flash Microcontrollers with 10-bit A/D and nanoWatt Technology

PIC18F1220/1320
FIGURE 10-14: BLOCK DIAGRAM OF RB7/PGD/T1OSI/P1D/KBI3 PIN
ECCP1 P1C/D Enable
RBPU⁽²⁾
P1B/D Tri-State Auto-Shutdown
P1D Data
VDD
P
Weak
Pull-up
1
To RB6 pin
0
RD LATB
Data Bus
WR LATB or
PORTB
D
Q
CK Q
Data Latch
WR TRISB
D
Q
CK Q
TRIS Latch
RB7 pin
T1OSCEN
RD TRISB
Set RBIF
RD PORTB
TTL
Input
Buffer
Q
D
EN
Schmitt
Trigger
Q1
From other
RB7:RB4 pins
PGD
QD
RD PORTB
EN
Q3
Note 1: I/O pins have diode protection to VDD and VSS.
2: To enable weak pull-ups, set the appropriate TRIS bit(s) and clear the RBPU bit (INTCON2<7>).
© 2007 Microchip Technology Inc.
DS39605F-page 97