PIC18F1220 MICROCHIP [Microchip Technology], PIC18F1220 Datasheet - Page 93

• 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 10-8:
 2004 Microchip Technology Inc.
Note 1:
Analog Input Mode
EUSART Enable
2:
TX/CK TRIS
TX/CK Data
BLOCK DIAGRAM OF RB1/AN5/TX/CK/INT1 PIN
WR TRISB
WR LATB
Data Bus
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>).
RBPU
PORTB
(2)
or
RD PORTB
Data Latch
TRIS Latch
RD LATB
D
D
CK
CK
RD TRISB
Q
Q
INT1/CK Input
To A/D Converter
DD
and V
SS
.
Analog Input
Mode
1
0
Schmitt
Trigger
Input
Buffer
PIC18F1220/1320
Q
TTL
Input
Buffer
EN
RD PORTB
D
V
P
DD
Weak
Pull-up
RB1 pin
(1)
DS39605C-page 91