參數(shù)資料
型號(hào)： W78M64V-70SBM
廠商： WHITE ELECTRONIC DESIGNS CORP
元件分類： PROM
英文描述： 8M X 64 FLASH 3.3V PROM MODULE, 70 ns, PBGA159
封裝： 13 X 22 MM, 1.27 MM PITCH, PLASTIC, BGA-159
文件頁數(shù)： 13/54頁
文件大?。?/td> 1349K
代理商： W78M64V-70SBM
20
White Electronic Designs Corporation (602) 437-1520 www.whiteedc.com
White Electronic Designs
W78M64V-XSBX
July 2006
Rev. 4
White Electronic Designs Corp. reserves the right to change products or specications without notice.
Sector Protect:
Write 60h to sector
address with
A7-A0 =
00000010
Set up sector
address
Wait 100 s
Verify Sector
Protect: Write 40h
to sector address
with A7-A0 =
00000010
Read from
sector address
with A7-A0 =
00000010
START
PLSCNT = 1
RESET# = V ID
Wait 4 s
First Write
Cycle = 60h?
Data = 01h?
Remove V ID
from RESET#
Write reset
command
Sector Protect
complete
Yes
No
PLSCNT
= 25?
Yes
Device failed
Increment
PLSCNT
Temporary Sector
Unprotect Mode
No
Sector Unprotect:
Write 60h to sector
address with
A7-A0 =
01000010
Set up first sector
address
Wait 1.2 ms
Verify Sector
Unprotect: Write
40h to sector
address with
A7-A0 =
00000010
Read from
sector address
with A7-A0 =
00000010
START
PLSCNT = 1
RESET# = V ID
Wait 4 s
Data = 00h?
Last sector
verified?
Remove V ID
from RESET#
Write reset
command
Sector Unprotect
complete
Yes
No
PLSCNT
= 1000?
Yes
Device failed
Increment
PLSCNT
Temporary Sector
Unprotect Mode
No
All sectors
protected?
Yes
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
Set up
next sector
address
No
Yes
No
Yes
No
Yes
No
Sector Protect
Algorithm
Sector Unprotect
Algorithm
First Write
Cycle = 60h?
Protect another
sector?
Reset
PLSCNT = 1
Remove V ID
from RESET#
Write reset
command
Sector Protect
complete
Remove V ID
from RESET#
Write reset
command
Sector Unprotect
complete
FIGURE 2. IN-SYSTEM SECTOR PROTECTION/SECTOR UNPROTECTION ALGORITHMS
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