UM1634 datasheet(29/43 Pages) STMICROELECTRONICS

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UM1634

API specification

Return values

Comments

The bit field allocation for blkLockState is same as that in ‘GetLock()’ function.

Assumptions

It assumes that the Flash block is initialized using a ‘FlashInit()’ API.

3.6.11

FlashDepletionRecover()

Description

This function recovers over-erased or depleted bits in flash block. It is possible that a

brownout during Flash erase operation will leave the bits in the Flash block(s) being erased

at an over-erased or depleted state. Depending how depleted the bits are, the excessive

column leakage caused by the bits might cause the following erase operation for brownout

recovery to fail due to suppressed drain bias. For such case, this function invok to recover

the depleted bits in those Flash block(s) so that they can be erased again for brownout

recovery.

Prototype

UINT32 FlashDepletionRecover (PSSD_CONFIG pSSDConfig,

UINT8 shadowFlag,

UINT32 lowEnabledBlocks,

UINT32 midEnabledBlocks,

UINT32 highEnabledBlocks,

void (*CallBack)(void));

Table 36. Return values for SetLock()

Return Values

Possible Causes

Solution

C90FL_ERROR_LOCK_INDICATOR

The input blkLockIndicator is

invalid.

Set this argument to

correct value listed in

Table 30

C90FL_ERROR_PASSWORD

The given password cannot enable

the block lock register for register

writes.

Pass in a correct

password

C90FL_OK

Successful completion

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