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PC28F00AP30TFA Datasheet(PDF) 34 Page - Micron Technology |
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PC28F00AP30TFA Datasheet(HTML) 34 Page - Micron Technology |
34 / 86 page P30-65nm Datasheet Sept 2012 34 Order Number: 208042-0 6 11.0 Register When non-array reads are performed in asynchronous page mode, only the first data is valid and all subsequent data are undefined. When a non-array read operation occurs as synchronous burst mode, the same word of data requested will be output on successive clock edges until the burst length requirements are satisfied. 11.1 Status Register (SR) The Status Register provides the ready/busy information of the device, as well as the error information about the program, erase, VPP and block-locked operations. please refer to Section 7.4, “Read Status Register” on page 23 and Section 7.5, “Clear Status Register” on page 23 for detail operations. Notes: 1. Always clear the Status Register prior to resuming erase operations. It avoids Status Register ambiguity when issuing commands during Erase Suspend. If a command sequence error occurs during an erase-suspend state, the Status Register contains the command sequence error status (SR[7,5,4] set). When the erase operation resumes and finishes, possible errors during the erase operation cannot be detected via the Status Register because it contains the previous error status 2. BEFP mode is only valid in array. Table 12: Status Register Description Status Register (SR) Default Value = 0x80 Device Write Status Erase Suspend Status Erase Status Program Status VPP Status Program Suspend Status Block-Locked Status BEFP Write Status DWS ESS ES PS VPPS PSS BLS BWS 7 6 54 321 0 Bit Name Description 7 Device Write Status (DWS) 0 = Device is busy; program or erase cycle in progress; SR.0 valid. 1 = Device is ready; SR[6:1] are valid. 6 Erase Suspend Status (ESS) 0 = Erase suspend not in effect. 1 = Erase suspend in effect. 5 Erase Status (ES) Command Sequence Error SR.5 SR.4 Description 4 Program Status (PS) 0 0 1 1 0 1 0 1 Program or Erase operation successful. Program error - operation aborted. Erase error - operation aborted. Command sequence error - command aborted. 3 VPP Status (VPPS) 0 = VPP within acceptable limits during program or erase operation. 1 = VPP ≤ VPPLK during program or erase operation. 2 Program Suspend Status (PSS) 0 = Program suspend not in effect. 1 = Program suspend in effect. 1 Block-Locked Status (BLS) 0 = Block not locked during program or erase. 1 = Block locked during program or erase; operation aborted. 0BEFP Write Status (BWS) After Buffered Enhanced Factory Programming (BEFP) data is loaded into the buffer: 0 = BEFP complete. 1 = BEFP in-progress. |
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