參數(shù)資料
型號(hào): P89LPC9161FDH,129
廠商: NXP Semiconductors
文件頁數(shù): 21/27頁
文件大?。?/td> 0K
描述: IC 80C51 MCU FLASH 2KB 16TSSOP
標(biāo)準(zhǔn)包裝: 96
系列: LPC900
核心處理器: 8051
芯體尺寸: 8-位
速度: 18MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 14
程序存儲(chǔ)器容量: 2KB(2K x 8)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 2.4 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 4x8b; D/A 1x8b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 16-TSSOP(0.173",4.40mm 寬)
包裝: 管件
其它名稱: 935290261129
2010 Microchip Technology Inc.
Preliminary
DS39979A-page 85
PIC18F87J72 FAMILY
7.5.2
FLASH PROGRAM MEMORY WRITE
SEQUENCE (WORD
PROGRAMMING).
The PIC18F87J72 family of devices has a feature that
allows programming a single word (two bytes). This
feature is enabled when the WPROG bit is set. If the
memory location is already erased, the following
sequence is required to enable this feature:
1.
Load the Table Pointer register with the address
of the data to be written
2.
Write the 2 bytes into the holding registers and
perform a table write
3.
Set WPROG to enable single-word write.
4.
Set WREN to enable write to memory.
5.
Disable interrupts.
6.
Write 55h to EECON2.
7.
Write 0AAh to EECON2.
8.
Set the WR bit. This will begin the write cycle.
9.
The CPU will stall for duration of the write for TIW
(see parameter D133A).
10. Re-enable interrupts.
EXAMPLE 7-4:
SINGLE-WORD WRITE TO FLASH PROGRAM MEMORY
MOVLW
CODE_ADDR_UPPER
; Load TBLPTR with the base address
MOVWF
TBLPTRU
MOVLW
CODE_ADDR_HIGH
MOVWF
TBLPTRH
MOVLW
CODE_ADDR_LOW
MOVWF
TBLPTRL
MOVLW
DATA0
MOVWF
TABLAT
TBLWT*+
MOVLW
DATA1
MOVWF
TABLAT
TBLWT*
PROGRAM_MEMORY
BSF
EECON1, WPROG
; enable single word write
BSF
EECON1, WREN
; enable write to memory
BCF
INTCON, GIE
; disable interrupts
MOVLW
55h
Required
MOVWF
EECON2
; write 55h
Sequence
MOVLW
0AAh
MOVWF
EECON2
; write 0AAh
BSF
EECON1, WR
; start program (CPU stall)
BSF
INTCON, GIE
; re-enable interrupts
BCF
EECON1, WPROG
; disable single word write
BCF
EECON1, WREN
; disable write to memory
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