参数资料
型号: MX29F400TMI-70
厂商: MACRONIX INTERNATIONAL CO LTD
元件分类: PROM
英文描述: 256K X 16 FLASH 5V PROM, 70 ns, PDSO44
封装: 0.500 INCH, PLASTIC, MO-175, SOP-44
文件页数: 31/45页
文件大小: 722K
代理商: MX29F400TMI-70
37
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
CHIP UNPROTECTION ALGORITHM FOR SYSTEM WITHOUT 12V
START
Protect All Sectors
PLSCNT=1
Chip Unprotect
Complete
Data=00H?
Yes
Set OE=A9=VIH
CE=VIL,A6=1
Activate WE Pulse to start
Data don't care
Set OE=CE=VIL
A9=VIH,A1=1
Set Up First Sector Addr
All sectors have
been verified?
Write Reset Command
Device Failed
PLSCNT=1000?
No
Increment
PLSCNT
No
Read Data from Device
Yes
No
Increment
Sector Addr
* It is recommended before unprotect whole chip, all sectors should be protected in advance.
Write "unlock for sector protect/unprotect"
Command (Table 1)
Toggle bit checking
Q6 not Toggled
Yes
No
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