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PIC16F818-E/ML bảng dữ liệu(PDF) 57 Page - Microchip Technology

tên linh kiện PIC16F818-E/ML
Giải thích chi tiết về linh kiện  18/20-Pin Enhanced Flash Microcontrollers with nanoWatt Technology
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nhà sản xuất  MICROCHIP [Microchip Technology]
Trang chủ  http://www.microchip.com
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PIC16F818-E/ML bảng dữ liệu(HTML) 57 Page - Microchip Technology

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 2004 Microchip Technology Inc.
DS39598E-page 55
PIC16F818/819
EXAMPLE 6-1:
CHANGING THE PRESCALER ASSIGNMENT FROM TIMER0 TO WDT
EXAMPLE 6-2:
CHANGING THE PRESCALER ASSIGNMENT FROM WDT TO TIMER0
TABLE 6-1:
REGISTERS ASSOCIATED WITH TIMER0
BANKSEL
OPTION_REG
; Select Bank of OPTION_REG
MOVLW
b'xx0x0xxx'
; Select clock source and prescale value of
MOVWF
OPTION_REG
; other than 1:1
BANKSEL
TMR0
; Select Bank of TMR0
CLRF
TMR0
; Clear TMR0 and prescaler
BANKSEL
OPTION_REG
; Select Bank of OPTION_REG
MOVLW
b'xxxx1xxx'
; Select WDT, do not change prescale value
MOVWF
OPTION_REG
CLRWDT
; Clears WDT and prescaler
MOVLW
b'xxxx1xxx'
; Select new prescale value and WDT
MOVWF
OPTION_REG
CLRWDT
; Clear WDT and prescaler
BANKSEL
OPTION_REG
; Select Bank of OPTION_REG
MOVLW
b'xxxx0xxx'
; Select TMR0, new prescale
MOVWF
OPTION_REG
; value and clock source
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
01h,101h
TMR0
Timer0 Module Register
xxxx xxxx
uuuu uuuu
0Bh,8Bh,
10Bh,18Bh
INTCON
GIE
PEIE
TMR0IE
INTE
RBIE TMR0IF
INTF
RBIF
0000 000x
0000 000u
81h,181h
OPTION_REG
RBPU
INTEDG
T0CS
T0SE
PSA
PS2
PS1
PS0
1111 1111
1111 1111
Legend:
x
= unknown, u = unchanged, - = unimplemented locations read as ‘0’. Shaded cells are not used by Timer0.



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