
PIC16C745/765
DS41124C-page 34
Preliminary
2000 Microchip Technology Inc.
TABLE 5-3:
PORTB FUNCTIONS
TABLE 5-4:
SUMMARY OF REGISTERS ASSOCIATED WITH PORTB
Name
Function
Input
Type
Output
Type
Description
RB0/INT
RB0
TTL
CMOS
Bi-directional I/O
INT
ST
—
Interrupt
RB1
TTL
CMOS
Bi-directional I/O
RB2
TTL
CMOS
Bi-directional I/O
RB3
TTL
CMOS
Bi-directional I/O
RB4
TTL
CMOS
Bi-directional I/O with Interrupt-on-Change
RB5
TTL
CMOS
Bi-directional I/O with Interrupt-on-Change
RB6/ICSPC
RB6
TTL
CMOS
Bi-directional I/O with Interrupt-on-Change
ICSPC
ST
In-Circuit Serial Programming Clock input
RB7/ICSPD
RB7
TTL
CMOS
Bi-directional I/O with Interrupt-on-Change
ICSPD
ST
CMOS
In-Circuit Serial Programming Data I/O
Legend:
OD = open drain, ST = Schmitt Trigger
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on:
POR,
BOR
Value on all
other resets
06h, 106h
PORTB
RB7
RB6
RB5
RB4
RB3
RB2
RB1
RB0
xxxx xxxx
uuuu uuuu
86h, 186h
TRISB
PORTB Data Direction Register
1111 1111
81h, 181h
OPTION_REG
RBPU
INTEDG
T0CS
T0SE
PSA
PS2
PS1
PS0
1111 1111
Legend: x = unknown, u = unchanged. Shaded cells are not used by PORTB.
745cov.book Page 34 Wednesday, August 2, 2000 8:24 AM