S29GL01GS datasheet(44/104 Pages) SPANSION

44 / 104 page

GL-S MirrorBit® Family

S29GL_128S_01GS_00_06 March 16, 2012

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Sh e e t

5.5.2

Protection Error

If an embedded algorithm attempts to change data within a protected area (program, or erase of a protected

sector or OTP area) the device (EAC) goes busy for a period of 20 to 100 µs then returns to normal operation.

During the busy period the RY/BY# output remains Low, data polling status continues to be overlaid on all

address locations, and the status register shows not ready with invalid status bits (SR[7] = 0).

During the protection error status busy period the data polling status will show the following:



DQ7 is the inversion of the DQ7 bit in the last word loaded into the write buffer. DQ7 = 0 for an erase

failure



DQ6 continues to toggle, independent of the address used to read status



DQ5 = 0; to indicate no failure of the embedded operation during the busy period



DQ4 is RFU and should be treated as don’t care (masked)



DQ3 = 1 to indicate embedded sector erase in progress



DQ2 continues to toggle, independent of the address used to read status



DQ1 = 1; Write buffer abort error



DQ0 is RFU and should be treated as don’t care (masked)

Commands that are accepted during the protection error status busy period are:



Status Register Read

When the busy period ends the device returns to normal operation, the data polling status is no longer

overlaid, RY/BY# is High, and the status register shows ready with valid status bits. The device is ready for

flash array read or write of a new command.

After the protection error status busy period the Status Register will show the following:



SR[7] = 1; Valid status displayed



SR[6] = X; May or may not be erase suspended after the protection error busy period



SR[5] = 1 on erase error, else = 0



SR[4] = 1 on program error, else = 0



SR[3] = 0; Program not aborted



SR[2] = 0; No Program in suspension



SR[1] = 1; Error due to attempting to change a protected location



SR[0] = X; RFU, treat as don’t care (masked)

Commands that are accepted after the protection error status busy period are:



Any command

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