參數(shù)資料
型號: PIC16F83A-10/P
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 10 MHz, RISC MICROCONTROLLER, PDIP18
封裝: 0.300 INCH, PLASTIC, DIP-18
文件頁數(shù): 43/125頁
文件大小: 2018K
代理商: PIC16F83A-10/P
PIC16F8X
DS30430C-page 24
1998 Microchip Technology Inc.
EXAMPLE 5-1:
INITIALIZING PORTB
CLRF
PORTB
; Initialize PORTB by
; setting output
; data latches
BSF
STATUS, RP0
; Select Bank 1
MOVLW
0xCF
; Value used to
; initialize data
; direction
MOVWF
TRISB
; Set RB<3:0> as inputs
; RB<5:4> as outputs
; RB<7:6> as inputs
TABLE 5-3
PORTB FUNCTIONS
TABLE 5-4
SUMMARY OF REGISTERS ASSOCIATED WITH PORTB
Name
Bit
Buffer Type
I/O Consistency Function
RB0/INT
bit0
TTL/ST(1)
Input/output pin or external interrupt input. Internal software
programmable weak pull-up.
RB1
bit1
TTL
Input/output pin. Internal software programmable weak pull-up.
RB2
bit2
TTL
Input/output pin. Internal software programmable weak pull-up.
RB3
bit3
TTL
Input/output pin. Internal software programmable weak pull-up.
RB4
bit4
TTL
Input/output pin (with interrupt on change). Internal software programmable
weak pull-up.
RB5
bit5
TTL
Input/output pin (with interrupt on change). Internal software programmable
weak pull-up.
RB6
bit6
TTL/ST(2)
Input/output pin (with interrupt on change). Internal software programmable
weak pull-up. Serial programming clock.
RB7
bit7
TTL/ST(2)
Input/output pin (with interrupt on change). Internal software programmable
weak pull-up. Serial programming data.
Legend: TTL = TTL input, ST = Schmitt Trigger.
Note 1: This buffer is a Schmitt Trigger input when configured as the external interrupt.
2: This buffer is a Schmitt Trigger input when used in serial programming mode.
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
Power-on
Reset
Value on all
other resets
06h
PORTB
RB7
RB6
RB5
RB4
RB3
RB2
RB1
RB0/INT
xxxx xxxx
uuuu uuuu
86h
TRISB
TRISB7
TRISB6
TRISB5
TRISB4
TRISB3
TRISB2
TRISB1
TRISB0
1111 1111
81h
OPTION_
REG
RBPU
INTEDG
T0CS
T0SE
PSA
PS2
PS1
PS0
1111 1111
Legend: x = unknown, u = unchanged. Shaded cells are not used by PORTB.
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