參數(shù)資料
型號: M30L0T8000B0ZAQE
廠商: STMICROELECTRONICS
元件分類: PROM
英文描述: 16M X 16 FLASH 1.8V PROM, 85 ns, PBGA88
封裝: 8 X 10 MM, 0.80 MM PITCH, LEAD FREE, BGA-88
文件頁數(shù): 31/103頁
文件大小: 794K
代理商: M30L0T8000B0ZAQE
M30L0T8000T0, M30L0T8000B0
Status Register
33/103
5
Status Register
The Status Register provides information on the current or previous program or erase
operations. Issue a Read Status Register command to read the contents of the Status
Register, refer to Read Status Register Command section for more details. To output the
contents, the Status Register is latched and updated on the falling edge of the Chip Enable
or Output Enable signals and can be read until Chip Enable or Output Enable returns to VIH.
The Status Register can only be read using single Asynchronous or Single Synchronous
reads. Bus Read operations from any address within the bank, always read the Status
Register during program and erase operations, if no Read Array command has been issued.
The various bits convey information about the status and any errors of the operation. Bits
SR7, SR6, SR2 and SR0 give information on the status of the device and are set and reset
by the device. Bits SR5, SR4, SR3 and SR1 give information on errors, they are set by the
device but must be reset by issuing a Clear Status Register command or a hardware reset.
If an error bit is set to ‘1’ the Status Register should be reset before issuing another
command.
The bits in the Status Register are summarized in Table 9: Status Register Bits. Refer to
Table 9 in conjunction with the following text descriptions.
5.1
Program/Erase Controller Status Bit (SR7)
The Program/Erase Controller Status bit indicates whether the Program/Erase Controller is
active or inactive in any bank.
When the Program/Erase Controller Status bit is Low (set to ‘0’), the Program/Erase
Controller is active; when the bit is High (set to ‘1’), the Program/Erase Controller is inactive,
and the device is ready to process a new command.
The Program/Erase Controller Status bit is Low immediately after a Program/Erase
Suspend command is issued until the Program/Erase Controller pauses. After the
Program/Erase Controller pauses the bit is High.
5.2
Erase Suspend Status Bit (SR6)
The Erase Suspend Status bit indicates that an erase operation has been suspended in the
addressed block. When the Erase Suspend Status bit is High (set to ‘1’), a Program/Erase
Suspend command has been issued and the memory is waiting for a Program/Erase
Resume command.
The Erase Suspend Status bit should only be considered valid when the Program/Erase
Controller Status bit is High (Program/Erase Controller inactive). SR6 is set within the Erase
Suspend Latency time of the Program/Erase Suspend command being issued therefore the
memory may still complete the operation rather than entering the Suspend mode.
When a Program/Erase Resume command is issued the Erase Suspend Status bit returns
Low.
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