 |
データシートサーチシステム |
|
|
データシートサーチシステム |
|
HT85F2270 データシート(PDF) 37 Page - Holtek Semiconductor Inc |
|
|
|||||||||||||||||||||||||||||
HT85F2270 データシート(HTML) 37 Page - Holtek Semiconductor Inc |
|
|
37 / 226 page  Rev. 1.00 �7 of ��6 �a� 1�� �01� Standard 8051 8-Bit Flash MCU HT85F2260/HT85F2270/HT85F2280 Flash Memory Read/Write Operations The flash memory can be read from and written to using register operations. To ensure protection of application data certain protection measures have to be first carried out before any read and write operations are executed on the Flash Memory. Unlocking the Flash Memory Before writing data to the Flash Memory it must first be unlocked. This is implemented by writing a correct data sequence to the Flash Memory Unlock key register, FMKEY. It is recommended to write the data sequence to the FMKEY register in 4 consecutive instructions. The following flowchart illustrates the unlock procedure. START F�KEY = 0x��; F�KEY = 0xAA; F�KEY = 0x00; F�KEY = 0xFF; Bit UNLOCK is 1 For example� 4 consecutive statements in C language END Bit UNLOCK is 0 Flash memor� is in locked state Flash memor� is in unlocked state Unlock Procedure Flowchart |
|
リンク URL |
| ALLDATASHEETはお客様のビジネスに役立ちますか？ [ DONATE ] |
Alldatasheetは | 広告 | お問い合わせ | プライバシーポリシー | データシートへのリンク | リンク交換 | メーカーリスト All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Japanese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
