參數(shù)資料
型號： S29WS128J0PBFW002
廠商： SPANSION LLC
元件分類： PROM
英文描述： 8M X 16 FLASH 1.8V PROM, 55 ns, PBGA84
封裝： 8 X 11.60 MM, LEAD FREE, FBGA-84
文件頁數(shù)： 19/97頁
文件大小： 2421K
代理商： S29WS128J0PBFW002
26
S29WS128J/064J
S29WS-J_00_A6 May 11, 2006
Dat a
S h ee t
Figure 2. PPB Program/Erase Algorithm
Dynamic Protection Bits
Dynamic Protection Bits are volatile and unique for each sector and can be individually modified.
DYBs only control the protection scheme for unprotected sectors that have their PPBs cleared
(erased to “1”). By issuing the DYB Set or Clear command sequences, the DYBs are set (pro-
grammed to “0”) or cleared (erased to “1”), thus placing each sector in the protected or
unprotected state respectively. This feature allows software to easily protect sectors against in-
advertent changes yet does not prevent the easy removal of protection when changes are
needed.
Read Byte Twice
Addr = SA0
Enter PPB
Command Set.
Addr = BA
Program PPB Bit.
Addr = SA
DQ5 = 1?
Yes
No
Yes
DQ6 =
Toggle?
DQ6 =
Toggle?
Read Byte.
Addr = SA
PASS
FAIL
Issue Reset
Command
Exit PPB
Command Set
DQ0 =
'1' (Erase)
'0' (Pgm.)?
Read Byte Twice
Addr = SA0
No
Wait 500 s
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S29WS128J0PBAW002 8M X 16 FLASH 1.8V PROM, 55 ns, PBGA84
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