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參數(shù)資料
| 型號： | S29GL128N11FFIVH2 |
| 廠商： | SPANSION LLC |
| 元件分類： | PROM |
| 英文描述： | 16M X 16 FLASH 3V PROM, 110 ns, PBGA64 |
| 封裝： | 10 X 13 MM, 1 MM PITCH, LEAD FREE, FBGA-64 |
| 文件頁數(shù)： | 41/74頁 |
| 文件大?。?/td> | 1593K |
| 代理商： | S29GL128N11FFIVH2 |
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S29GL-N
S29GL-N_01_A0 May 1, 2006
Da ta
Sh e e t
10.12 Non-Volatile Sector Protection Command Set Definitions
The Non-Volatile Sector Protection Command Set permits the user to program the Persistent Protection Bits
(PPB bits), erase all of the Persistent Protection Bits (PPB bits), and read the logic state of the Persistent
Protection Bits (PPB bits).
The Non-Volatile Sector Protection Command Set Entry command sequence must be issued prior to any
of the commands listed following to enable proper command execution.
Note that issuing the Non-Volatile Sector Protection Command Set Entry command disables reads and
writes for the main memory.
PPB Program Command
The PPB Program command is used to program, or set, a given PPB bit. Each PPB bit is individually
programmed (but is bulk erased with the other PPB bits). The specific sector address (A23-A16 for
S29GL256N, A22-A16 for S29GL128N) is written at the same time as the program command. If the PPB
Lock Bit is set to the freeze state, the PPB Program command does not execute and the command times-
out without programming the PPB bit.
All PPB Erase Command
The All PPB Erase command is used to erase all PPB bits in bulk. There is no means for individually
erasing a specific PPB bit. Unlike the PPB program, no specific sector address is required. However, when
the All PPB Erase command is issued, all Sector PPB bits are erased in parallel. If the PPB Lock Bit is set
to freeze state, the ALL PPB Erase command does not execute and the command times-out without
erasing the PPB bits.
The device preprograms all PPB bits prior to erasing when issuing the All PPB Erase command. Also note
that the total number of PPB program/erase cycles has the same endurance as the flash memory array.
PPB Status Read Command
The programming state of the PPB for a given sector can be verified by writing a PPB Status Read
Command to the device. This requires an initial access time latency.
The Non-Volatile Sector Protection Command Set Exit command must be issued after the execution of
the commands listed previously to reset the device to read mode.
Note that issuing the Non-Volatile Sector Protection Command Set Exit command re-enables reads and
writes for the main memory.
10.13 Global Volatile Sector Protection Freeze Command Set
The Global Volatile Sector Protection Freeze Command Set permits the user to set the PPB Lock Bit and
reading the logic state of the PPB Lock Bit.
The Global Volatile Sector Protection Freeze Command Set Entry command sequence must be issued
prior to any of the commands listed following to enable proper command execution.
Reads and writes from the main memory are not allowed.
PPB Lock Bit Set Command
The PPB Lock Bit Set command is used to set the PPB Lock Bit to the freeze state if it is cleared either at
reset or if the Password Unlock command was successfully executed. There is no PPB Lock Bit Clear
command. Once the PPB Lock Bit is set to the freeze state, it cannot be cleared unless the device is taken
through a power-on clear (for Persistent Protection Mode) or the Password Unlock command is executed
(for Password Protection Mode). If the Password Protection Mode Lock Bit is programmed, the PPB Lock
Bit status is reflected as set to the freeze state, even after a power-on reset cycle.
PPB Lock Bit Status Read Command
The programming state of the PPB Lock Bit can be verified by executing a PPB Lock Bit Status Read
command to the device.
The Global Volatile Sector Protection Freeze Command Set Exit command must be issued after the
execution of the commands listed previously to reset the device to read mode.
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