M58BW016DB datasheet(29/63 Pages) STMICROELECTRONICS

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M58BW016BT, M58BW016BB, M58BW016DT, M58BW016DB

fore a new Program or Erase command is issued,

otherwise the new command will appear to fail.

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 Pro-

gram/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 com-

pleted its operation; when the bit is set to ‘1’, a Pro-

gram/Erase Suspend command has been issued

and the memory is waiting for a Program/Erase

Resume command.

When a Program/Erase Resume command is is-

sued the Program Suspend Status bit returns to

‘0’.

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 at-

tempted 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 Register com-

mand or a hardware reset. If set to ‘1’ it should be

reset before a new Program or Erase command is

issued, otherwise the new command will appear to

fail.

Tuning Protection Status (Bit 0)

The Tuning Protection Status bit indicates if the

device is locked (Tuning Protection is enabled) or

unlocked (Tuning Protection is disabled).

When the Tuning Protection Status bit is set to ‘0’

the device is locked, when it is set to ‘1’ the device

is unlocked. After a reset or power-up the device is

locked and so bit0 is set to ‘0’.

The Tuning Protection Status bit is set to ‘1’ for the

M58BW016D version.

Table 11. Status Register Bits

Note: 1. For the M58BW016D version the Tuning Protection Status bit is always set to ‘1’.

Bit

Name

Logic Level

Definition

Program/Erase Controller Status

’1’

Ready

’0’

Busy

Erase Suspend Status

’1’

Suspended

’0’

In Progress or Completed

Erase Status

’1’

Erase Error

’0’

Erase Success

Program Status,

Tuning Protection Unlock Status

’1’

Program Error

’0’

Program Success

VPP Status

’1’

VPP Invalid, Abort

’0’

VPP OK

Program Suspend Status

’1’

Suspended

’0’

In Progress or Completed

Erase/Program in a Protected

Block

’1’

Program/Erase on Protected Block,

Abort

’0’

No Operations to Protected Sectors

Tuning Protection Status

’1’

Tuning Protection Disabled(1)

’0’

Tuning Protection Enabled

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