S29GL128S SPANSION [SPANSION], S29GL128S Datasheet - Page 44

• Manufacturer Part Number: S29GL128S
• Manufacturer: SPANSION [SPANSION]

44
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:
Commands that are accepted during the protection error status busy period are:
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:
Commands that are accepted after the protection error status busy period are:
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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)
Status Register Read
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)
Any command
GL-S MirrorBit
D a t a
®
Family
S h e e t
S29GL_128S_01GS_00_06 March 16, 2012