UM1635 datasheet(27/42 Pages) STMICROELECTRONICS

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UM1635

API specification

Troubleshooting

Comments

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

Assumptions

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

2.6.11

FlashDepletionRecover()

Description

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

brownout during Flash erase operation leaves 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 is invoked 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,

BOOL shadowFlag,

UINT32 lowEnabledBlocks,

UINT32 midEnabledBlocks,

UINT32 highEnabledBlocks,

void (*CallBack)(void));

Table 41. Troubleshooting for SetLock()

Returned error bits

Possible causes

Solution

C90FL_ERROR_LOCK_INDICATOR

The input blkLockIndicator is

invalid.

Set this argument to correct value

listed in Table 34.

C90FL_ERROR_PASSWORD

The given password cannot enable

the block lock register for register

writes.

Pass in a correct password.

UM1635 Datasheet(PDF) 27 Page - STMicroelectronics