PIC16C621A Microchip Technology Inc., PIC16C621A Datasheet - Page 31

• Manufacturer Part Number: PIC16C621A
• Description: Eprom-based 8-bit Cmos Microcontrollers
• Manufacturer: Microchip Technology Inc.

TABLE 5-3:
TABLE 5-4:
 2003 Microchip Technology Inc.
RB0/INT
RB1
RB2
RB3
RB4
RB5
RB6
RB7
Legend: ST = Schmitt Trigger, TTL = TTL input
Note 1: This buffer is a Schmitt Trigger input when configured as the external interrupt.
Address Name
06h
86h
81h
Legend: u = unchanged, x = unknown
Note 1: Shaded bits are not used by PORTB.
Name
2: This buffer is a Schmitt Trigger input when used in Serial Programming mode.
PORTB
TRISB
OPTION
bit0
bit1
bit2
bit3
bit4
bit5
bit6
bit7
Bit #
PORTB FUNCTIONS
SUMMARY OF REGISTERS ASSOCIATED WITH PORTB
TRISB7
RBPU
Bit 7
RB7
TTL/ST
TTL
TTL
TTL
TTL
TTL
TTL/ST
TTL/ST
Buffer Type
INTEDG
TRISB6
Bit 6
RB6
(1)
(2)
(2)
TRISB5 TRISB4 TRISB3 TRISB2 TRISB1 TRISB0 1111 1111 1111 1111
T0CS
Bit 5
RB5
Input/output or external interrupt input. 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. Internal software programmable weak pull-up.
Input/output pin (with interrupt-on-change). Internal software programmable
weak pull-up.
Input/output pin (with interrupt-on-change). Internal software programmable
weak pull-up.
Input/output pin (with interrupt-on-change). Internal software programmable
weak pull-up. Serial programming clock pin.
Input/output pin (with interrupt-on-change). Internal software programmable
weak pull-up. Serial programming data pin.
T0SE
Bit 4
RB4
Bit 3
PSA
RB3
Bit 2
RB2
PS2
Function
Bit 1
RB1
PS1
Bit 0
RB0
PS0
PIC16C62X
xxxx xxxx uuuu uuuu
1111 1111 1111 1111
Value on
POR
DS30235J-page 29
All Other
Value on
RESETS