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參數(shù)資料
| 型號(hào)： | S29CD016G0JFFM012 |
| 廠商： | Spansion Inc. |
| 英文描述： | 32 Megabit (1M x 32-Bit), 16 Megabit (512K x 32-Bit) 2.5 Volt-only Burst Mode, Dual Boot, Simultaneous Read/ Write Flash Memory with VersatileI/O |
| 中文描述： | 32兆位（1米× 32位），16兆位（512k × 32的位），2.5伏，只有突發(fā)模式，雙啟動(dòng)，同步讀/寫閃存與VersatileI內(nèi)存/輸出 |
| 文件頁數(shù)： | 53/87頁 |
| 文件大?。?/td> | 792K |
| 代理商： | S29CD016G0JFFM012 |
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November 14, 2005 S29CD-G_00_B0
S29CD-G Flash Family
51
P r e l i m i n a r y
Password Protection Mode Locking Bit Program Command
The Password Protection Mode Locking Bit Program Command programs the Password Protection
Mode Locking Bit, which prevents further verifies or updates to the Password. Once programmed,
the Password Protection Mode Locking Bit cannot be erased! If the Password Protection Mode
Locking Bit is verified as program without margin, the Password Protection Mode Locking Bit Pro-
gram command can be executed to improve the program margin. Once the Password Protection
Mode Locking Bit is programmed, the Persistent Sector Protection Locking Bit program circuitry
is disabled, thereby forcing the device to remain in the Password Protection mode. Exiting the
Mode Locking Bit Program command is accomplished by writing the Read/Reset command.
The Password Protection Mode Locking Bit Program command is permitted if the Secured Silicon
sector is enabled.
Persistent Sector Protection Mode Locking Bit Program Command
The Persistent Sector Protection Mode Locking Bit Program Command programs the Persistent
Sector Protection Mode Locking Bit, which prevents the Password Mode Locking Bit from ever
being programmed. If the Persistent Sector Protection Mode Locking Bit is verified as pro-
grammed without margin, the Persistent Sector Protection Mode Locking Bit Program Command
should be reissued to improve program margin. By disabling the program circuitry of the Pass-
word Mode Locking Bit, the device is forced to remain in the Persistent Sector Protection mode of
operation, once this bit is set. Exiting the Persistent Protection Mode Locking Bit Program com-
mand is accomplished by writing the Read/Reset command.
The Persistent Sector Protection Mode Locking Bit Program command is permitted if the Secured
Silicon sector is enabled.
PPB Lock Bit Set Command
The PPB Lock Bit Set command is used to set the PPB Lock bit if it is cleared either at reset or if
the Password Unlock command was successfully executed. There is no PPB Lock Bit Clear com-
mand. Once the PPB Lock Bit is set, it cannot be cleared unless the device is taken through a
power-on clear or the Password Unlock command is executed. Upon setting the PPB Lock Bit, the
PPBs are latched into the DYBs. If the Password Mode Locking Bit is set, the PPB Lock Bit status
is reflected as set, even after a power-on reset cycle. Exiting the PPB Lock Bit Set command is
accomplished by writing the Read/Reset command.
The PPB Lock Bit Set command is permitted if the Secured Silicon sector is enabled.
DYB Write Command
The DYB Write command is used to set or clear a DYB for a given sector. The high order address
bits (A19–A11) are issued at the same time as the code 01h or 00h on DQ7-DQ0. All other DQ
data bus pins are ignored during the data write cycle. The DYBs are modifiable at any time, re-
gardless of the state of the PPB or PPB Lock Bit. The DYBs are cleared at power-up or hardware
reset. Exiting the DYB Write command is accomplished by writing the Read/Reset command.
The DYB Write command is permitted if the Secured Silicon sector is enabled.
Password Unlock Command
The Password Unlock command is used to clear the PPB Lock Bit so that the PPBs can be unlocked
for modification, thereby allowing the PPBs to become accessible for modification. The exact pass-
word must be entered in order for the unlocking function to occur. This command cannot be issued
any faster than 2 μs at a time to prevent a hacker from running through the all 64-bit combina-
tions in an attempt to correctly match a password. If the command is issued before the 2 μs
execution window for each portion of the unlock, the command is ignored.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| S29CD016G0JFFM100 | 制造商:SPANSION 制造商全稱:SPANSION 功能描述:32 Megabit (1M x 32-Bit), 16 Megabit (512K x 32-Bit) 2.5 Volt-only Burst Mode, Dual Boot, Simultaneous Read/ Write Flash Memory with VersatileI/O |
| S29CD016G0JFFM102 | 制造商:SPANSION 制造商全稱:SPANSION 功能描述:32 Megabit (1M x 32-Bit), 16 Megabit (512K x 32-Bit) 2.5 Volt-only Burst Mode, Dual Boot, Simultaneous Read/ Write Flash Memory with VersatileI/O |
| S29CD016G0JFFM110 | 制造商:SPANSION 制造商全稱:SPANSION 功能描述:32 Megabit (1M x 32-Bit), 16 Megabit (512K x 32-Bit) 2.5 Volt-only Burst Mode, Dual Boot, Simultaneous Read/ Write Flash Memory with VersatileI/O |
| S29CD016G0JFFM112 | 制造商:SPANSION 制造商全稱:SPANSION 功能描述:32 Megabit (1M x 32-Bit), 16 Megabit (512K x 32-Bit) 2.5 Volt-only Burst Mode, Dual Boot, Simultaneous Read/ Write Flash Memory with VersatileI/O |
| S29CD016G0JFFM200 | 制造商:SPANSION 制造商全稱:SPANSION 功能描述:32 Megabit (1M x 32-Bit), 16 Megabit (512K x 32-Bit) 2.5 Volt-only Burst Mode, Dual Boot, Simultaneous Read/ Write Flash Memory with VersatileI/O |
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