參數(shù)資料
型號(hào): W19L320SBB9L
廠商: WINBOND ELECTRONICS CORP
元件分類: PROM
英文描述: 2M X 16 FLASH 3.3V PROM, 90 ns, PBGA48
封裝: TFBGA-48
文件頁(yè)數(shù): 26/52頁(yè)
文件大?。?/td> 1869K
代理商: W19L320SBB9L
W19B(L)320ST/B
- 32 -
7.7 In-System Sector Protect/Unprotect Algorithms
START
PLSCNT=1
#RESET=VID
Wait 1 s
First Write
Cycle=60h?
Wait 150 s
Verity Sector
Protect:Write 40h
to sector address
with A6=0,
A1=1,A0=0
Set up sector
address
Yes
Sector Protect:
Write 60h to sector
address with
A6=0,A1=1,A0=0
Read from
sector address
with A6=0,
A1=1,A0=0
Remove V
from #RESET
ID
Write reset
command
Sector Protect
complete
Protect another
sector?
Data=01h?
Temporary Sector
Unprotect Mode
Increment
PLSCNT
=25?
No
Device failed
Yes
No
Reset
PLSCNT=1
START
PLSCNT=1
#RESET=VID
Wait 1 s
First Write
Cycle=60h?
Yes
All sector
protected?
Yes
Wait 15 mS
Verity Sector
Unprotect:Write 40h
to sector address
with A6=1,
A1=1,A0=0
Sector Unrotect:
Write 60h to sector
address with
A6=1,A1=1,A0=0
Read from
sector address
with A6=1,
A1=1,A0=0
Remove V
from #RESET
ID
Write reset
command
Last sector
verified
Data=00h?
No
Yes
No
Set up first
sector address
Protect all sectors
The indicated portion
of the sector protect
algorithm must be
performed for all
unprotected sectors
prior to issuing the
first sector
unprotect address
Temporary Sector
Unprotect Mode
No
Increment
PLSCNT
=1000?
Device failed
Yes
Sector Unprotectt
complete
Set up
next sector
address
Yes
Sector Protect
Algorithm
Sector Unprotect
Algorithm
No
Yes
No
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