PIC16CE62X
TABLE 5-3:
PORTB FUNCTIONS
Name
Bit #
Buffer Type
Function
(1)
RB0/INT
bit0
Input/output or external interrupt input. Internal software programmable
weak pull-up.
TTL/ST
RB1
RB2
RB3
RB4
bit1
bit2
bit3
bit4
TTL
TTL
TTL
TTL
Input/output pin. Internal software programmable weak pull-up.
Input/output pin. Internal software programmable weak pull-up.
Input/output pin. Internal software programmable weak pull-up.
Input/output pin (with interrupt on change). Internal software
programmable weak pull-up.
RB5
RB6
RB7
bit5
bit6
bit7
TTL
Input/output pin (with interrupt on change). Internal software
programmable weak pull-up.
(2)
Input/output pin (with interrupt on change). Internal software
programmable weak pull-up. Serial programming clock pin.
TTL/ST
(2)
Input/output pin (with interrupt on change). Internal software
programmable weak pull-up. Serial programming data pin.
TTL/ST
Legend: ST = Schmitt Trigger, TTL = TTL input
Note 1: This buffer is a Schmitt Trigger input when configured as the external interrupt.
Note 2: This buffer is a Schmitt Trigger input when used in serial programming mode.
TABLE 5-4:
SUMMARY OF REGISTERS ASSOCIATED WITH PORTB
Value on
All Other
Resets
Value on:
POR / BOR
Address Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
06h
86h
81h
PORTB
TRISB
RB7
RB6
RB5
RB4
RB3
RB2
RB1
RB0
xxxx xxxx uuuu uuuu
TRISB7 TRISB6 TRISB5 TRISB4 TRISB3 TRISB2 TRISB1 TRISB0 1111 1111 1111 1111
OPTION
RBPU INTEDG T0CS
T0SE
PSA
PS2
PS1
PS0
1111 1111 1111 1111
Note: Shaded bits are not used by PORTB.
u = unchanged
x = unknown
1998 Microchip Technology Inc.
Preliminary
DS40182A-page 27
MICROCHIP [ MICROCHIP ]
