參數資料
型號: KSZ8873MLLI
廠商: Micrel Inc
文件頁數: 8/115頁
文件大?。?/td> 0K
描述: IC ETHERNET SWITCH 3PORT 64LQFP
產品培訓模塊: KSZ8873 Ethernet Switches
標準包裝: 160
控制器類型: 以太網開關控制器
接口: MII
電源電壓: 1.8V,2.5V,3.3V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 64-LQFP
供應商設備封裝: 64-PQFP(10x10)
包裝: 托盤
2011 Microchip Technology Inc.
Preliminary
DS41609A-page 105
PIC16(L)F1508/9
10.3
Modifying Flash Program Memory
When modifying existing data in a program memory
row, and data within that row must be preserved, it must
first be read and saved in a RAM image. Program
memory is modified using the following steps:
1.
Load the starting address of the row to be
modified.
2.
Read the existing data from the row into a RAM
image.
3.
Modify the RAM image to contain the new data
to be written into program memory.
4.
Load the starting address of the row to be
rewritten.
5.
Erase the program memory row.
6.
Load the write latches with data from the RAM
image.
7.
Initiate a programming operation.
FIGURE 10-7:
FLASH PROGRAM
MEMORY MODIFY
FLOWCHART
Start
Modify Operation
Read Operation
Erase Operation
Modify Image
The words to be modified are
changed in the RAM image
End
Modify Operation
WRITE Operation
use RAM image
An image of the entire row read
must be stored in RAM
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