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參數(shù)資料
| 型號： | S29NS128PABBJW000 |
| 廠商： | SPANSION LLC |
| 元件分類： | DRAM |
| 英文描述： | MirrorBit Flash Family |
| 中文描述： | 8M X 16 FLASH 1.8V PROM, 80 ns, PBGA64 |
| 封裝： | 6.20 X 7.70 MM , LEAD FREE, TFBGA-64 |
| 文件頁數(shù)： | 56/86頁 |
| 文件大小： | 2234K |
| 代理商： | S29NS128PABBJW000 |
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56
S29NS-P MirrorBit
TM
Flash Family
S29NS-P_00_A1 February 20, 2007
D a t a
S h e e t
( A d v a n c e
I n f o r m a t i o n )
Notes
1. The DYBs can be set (programmed to
0
) or cleared (erased to
1
) as often as needed.
2. When the parts are first shipped, the DYBs are set and programmed to 0 upon power up or reset.
3. The default state of DYB is protected after power up and all sectors can be modified depending on
the status of PPB bit for that sector, (erased to
1
). Then the sectors can be modified depending
upon the PPB state of that sector (see
Table 7.1
).
4. It is possible to have sectors that are persistently locked with sectors that are left in the dynamic
state.
5. The DYB Set or Clear commands for the dynamic sectors signify protected or unprotectedstate of
the sectors respectively. However, if there is a need to change the status of the persistently locked
sectors, a few more steps are required. First, the PPB Lock Bit must be cleared by either putting
the device through a power cycle, or hardware reset. The PPBs can then be changed to reflect the
desired settings. Setting the PPB Lock Bit once again locks the PPBs, and the device operates
normally again.
6. To achieve the best protection, it is recommended to execute the PPB Lock Bit Set command early
in the boot code and protect the boot code by holding WP# = V
IL
.
7. Data polling is not available for DYB program/erase.
8. DYB read data can be done synchronously.
9. If customers attempt to program or erase a protected sector, the device ignores the command and
returns to read mode.
7.4
Persistent Protection Bit Lock Bit
The Persistent Protection Bit Lock Bit is a global volatile bit for all sectors. When set (programmed to
0
), it
locks all PPBs and when cleared (programmed to
1
), allows the PPBs to be changed. There is only one PPB
Lock Bit per device.
Notes
1. If the password mode is chosen, then the password must be programmed and verified before
setting the corresponding lock register bit.
2. No software command sequence unlocks this bit unless the device is in the password protection
mode; only a hardware reset or a power up clears this bit.
3. The PPB Lock Bit must be set (programmed to
0
) only after all PPBs are configured to the desired
settings.
7.5
Password Protection Method
The Password Protection Method allows an even higher level of security than the Persistent Sector Protection
Mode by requiring a 64 bit password for unlocking the device PPB Lock Bit. In addition to this password
requirement, after power up and reset, the PPB Lock Bit is set
0
to maintain the password mode of operation.
Successful execution of the Password Unlock command by entering the entire password clears the PPB Lock
Bit, allowing for sector PPBs modifications.
Notes
1. There is no special addressing order required for programming the password. Once the Password
is written and verified, the Password Mode Locking Bit must be set in order to prevent access.
2. The Password Program Command is only capable of programming
0
s. Programming a
1
after a
cell is programmed as a
0
results in a time out with the cell as a
0
.
3. The password is all
1
s when shipped from the factory.
4. All 64-bit password combinations are valid as a password.
5. There is no means to verify what the password is after it is set.
6. The Password Mode Lock Bit, once set, prevents reading the 64-bit password on the data bus and
further password programming.
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PDF描述 |
|---|---|
| S29NS128PABBJW003 | MirrorBit Flash Family |
| S29NS256P | MirrorBit Flash Family |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| S29NS128PABBJW003 | 制造商:SPANSION 制造商全稱:SPANSION 功能描述:MirrorBit Flash Family |
| S29NS256N | 制造商:SPANSION 制造商全稱:SPANSION 功能描述:256/128/64 Megabit (16/8/4M x 16-bit), CMOS 1.8 Volt-only Simultaneous Read/Write, Multiplexed, Burst Mode Flash Memory |
| S29NS256N0PBJW000 | 制造商:SPANSION 制造商全稱:SPANSION 功能描述:Simultaneous Read/Write, Multiplexed, Burst Mode Flash Memory |
| S29NS256N0PBJW002 | 制造商:SPANSION 制造商全稱:SPANSION 功能描述:Simultaneous Read/Write, Multiplexed, Burst Mode Flash Memory |
| S29NS256N0PBJW003 | 制造商:SPANSION 制造商全稱:SPANSION 功能描述:Simultaneous Read/Write, Multiplexed, Burst Mode Flash Memory |
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