2003 Microchip Technology Inc.
Preliminary
DS40300C-page 35
PIC16F62X
FIGURE 5-8:
BLOCK DIAGRAM OF
RB0/INT PIN
FIGURE 5-9:
BLOCK DIAGRAM OF
RB1/RX/DT PIN
Data Bus
WR PORTB
WR TRISB
RD PORTB
Data Latch
TRIS Latch
RB0/INT
INT
Q
D
CK
EN
QD
EN
RD TRISB
RBPU
P
V
DD
V
DD
V
SS
Q
D
CK
Q
Weak Pull-up
Schmitt
TTL
Input
Buffer
Trigger
Data Latch
TRIS Latch
RD TRISB
Q
D
Q
CK
Q
D
Q
CK
0
1
WR PORTB
WR TRISB
Schmitt
Trigger
Peripheral OE(2)
Data Bus
PORT/PERIPHERAL Select(1)
USART Data Output
USART Receive Input
RBPU
V
DD
P
EN
QD
V
DD
V
SS
Note
1: Port/Peripheral select signal selects between port
data and peripheral output.
2: Peripheral OE (output enable) is only active if
peripheral select is active.
RD PORTB
RX/DT
RB1/
TTL
Input
Buffer
Weak
Pull-up
