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參數(shù)資料
| 型號(hào)： | S71PL191HB0BFI100 |
| 廠商： | SPANSION LLC |
| 元件分類： | 存儲(chǔ)器 |
| 英文描述： | SPECIALTY MEMORY CIRCUIT, PBGA73 |
| 封裝： | 9 X 13 MM, LEAD FREE, FBGA-73 |
| 文件頁(yè)數(shù)： | 123/172頁(yè) |
| 文件大?。?/td> | 4662K |
| 代理商： | S71PL191HB0BFI100 |
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38
S29PL127H/S29PL129H
S29PL127H_129H_00A1 May 7, 2004
Pr el i m i n ary
Temporary Sector Unprotect
This feature allows temporary unprotection of previously protected sectors to
change data in-system. The Sector Unprotect mode is activated by setting the
RESET# pin to VID. During this mode, formerly protected sectors can be pro-
grammed or erased by selecting the sector addresses. Once VID is removed from
the RESET# pin, all the previously protected sectors are protected again. Figure
While PPB lock is set, the device cannot enter the Temporary Sector Unprotection
Mode.
Figure 2. Temporary Sector Unprotect Operation
SecSi (Secured Silicon) Sector Flash Memory Region
The SecSi (Secured Silicon) Sector feature provides a Flash memory region that
enables permanent part identification through an Electronic Serial Number (ESN)
The 128-word SecSi sector is divided into 64 factory-lockable words that can be
programmed and locked by the customer. The SecSi sector is located at ad-
dresses 000000h-00007Fh in both Persistent Protection mode and Password
Protection mode. It uses indicator bits (DQ6, DQ7) to indicate the factory-locked
and customer-locked status of the part.
The system accesses the SecSi Sector through a command sequence (see “Enter
SecSi Sector/Exit SecSi Sector Command Sequence”). After the system has
written the Enter SecSi Sector command sequence, it may read the SecSi Sector
by using the addresses normally occupied by the boot sectors. This mode of op-
eration continues until the system issues the Exit SecSi Sector command
sequence, or until power is removed from the device. On power-up, or following
START
Perform Erase or
Program Operations
RESET# = VIH
Temporary Sector
Unprotect Completed
(Note 2)
RESET# = VID
(Note 1)
Notes:
1. All protected sectors unprotected If WP#/ACC =
VIL, sectors 0, 1, 268, 269 will remain protected
(S29PL127H), or sectors SA1-133, SA1-134,
SA2-0, SA2-1 (S29PL129H).
2. All previously protected sectors are protected
once again.
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