© 2009 Microchip Technology Inc. DS41341E-page 71
PIC16F72X/PIC16LF72X
FIGURE 6-12: BLOCK DIAGRAM OF RB7
I/O Pin
VDD
VSS
D
Q
CK
Q
D
Q
CK
Q
RD
WR
WR
RD
Data Bus
PORTB
TRISB
TRISB
PORTB
D
Q
CK
Q
VDD
Weak
WR
WPUB
RD
WPUB
RBPU
D
Q
CK
Q
D
EN
Q
D
EN
Q
RD PORTB
WR
IOCB
RD
IOCB
Interrupt-on-
Change
Q3
ICSPDAT_IN
0
1
0
1
TRIS_ICDDAT
PORT_ICDDAT
ICSP™ MODE
DEBUG
