M58LW064A, M58LW064B

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Table 13. Status Register Definition

Note: 1. DQ0-DQ6 are High Impedance when DQ7 is indicating that the part is busy. Status Register P/ECS bit7 indicates the P/E. C. status,

check during Program or Erase, and on completion before checking bit4 or bit5 for Program or Erase Success.

2. DQ6 indicates the Erase Suspend Status. On an Erase Suspend instruction P/ECS and ESS bits are set to ’1’. ESS bit remains ’1’

until an Erase Resume instruction is given.

3. Erase Status, ES bit5 is set to ’1’ if the P/E. C. has applied the maximum number of erase pulses to the block without achieving an

erase verify.

4. Program Status, PS bit4 is set to ’1’ if the P/E.C . has failed to program a Word or Double-Word.

5. DQ2 indicates the Program Suspend Status. On a Program Suspend instruction P/ECS and PSS bits are set to ’1’. PSS bit remains

’1’ until an Program Resume instruction is given.

6. DQ1 defines the status of an Erase or Write to Buffer and Program instruction defined in a protected block. RP pin must be held at

7. DQ5 and DQ4 simultaneously at ’1’ after an Erase or Block Unprotect instruction indicates that an improper command was entered.

Mnemonic

DQ

Fun ction

Status

P/ECS

DQ7

P/E.C. Status

1 = Ready

ESS

DQ6

Erase Suspend Status

1 = Block Erase Suspended

ES

DQ5

1 = Error in Block Erase operation or Block

Unprotect

0 = Successful Block Erase operation or Block

PS

DQ4

Write to Buffer and Program/Block

1 = Error in Write to Buffer and Program, Block

0 = Write to Buffer and Program, Block Protect

Completed successfully

DQ3

Not used

PSS

DQ2

Program Suspend Status

1 = Program Suspended

EPPB

DQ1

Erase/Write to Buffer and Program in a

Protected Block

1 = Error in the defined operation

DQ0

Not used