M58BW16F datasheet(42/81 Pages) STMICROELECTRONICS

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Status Register

M58BW16F, M58BW32F

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5.5

Program Suspend Status (Bit 2)

The Program Suspend Status bit indicates that a Program operation has been suspended

and is waiting to be resumed. The Program Suspend Status should only be considered valid

when the Program/Erase Controller Status bit is set to ‘1’ (Program/Erase Controller

inactive); after a Program/Erase Suspend command is issued the memory may still

complete the operation rather than entering the Suspend mode.

When the Program Suspend Status bit is set to ‘0’, the Program/Erase Controller is active or

has completed its operation; when the bit is set to ‘1’, a Program/Erase Suspend command

has been issued and the memory is waiting for a Program/Erase Resume command.

When a Program/Erase Resume command is issued the Program Suspend Status bit

returns to ‘0’.

5.6

Block Protection Status (Bit 1)

The Block Protection Status bit can be used to identify if a Program or Erase operation has

tried to modify the contents of a protected block.

When the Block Protection Status bit is set to ‘0’, no Program or Erase operations have been

attempted to protected blocks since the last Clear Status Register command or hardware

reset; when the Block Protection Status bit is set to ‘1’, a Program or Erase operation has

been attempted on a protected block.

Once set to ‘1’, the Block Protection Status bit can only be reset Low by a Clear Status

or Erase command is issued, otherwise the new command will appear to fail.

5.7

Bit 0

Reserved bit (set to ‘1’).

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