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M58LT128GS Datasheet(PDF) 31 Page - STMicroelectronics |
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M58LT128GS Datasheet(HTML) 31 Page - STMicroelectronics |
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31 / 98 page  M58LT128GST, M58LT128GSB 5 Status Register 31/98 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. 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. Refer to Table 9: Status Register Bits 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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