UM1627 datasheet(29/38 Pages) STMICROELECTRONICS

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UM1627

API specification

If no blocks are enabled the C90FL_ERROR_AIC_NO_BLOCK error code is returned.

Depending on the address sequence specified the MISR values are calculated for the

enabled blocks using the corresponding sequence. If the MISR values calculated by the

hardware is not the same as the values passed to this API by the user then the API returns

the error code C90FL_ERROR_AIC_MISMATCH.

Assumptions

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

2.7.2

FlashECCLogicCheck()

Description

This function checks the ECC logic of the Flash. The API simulates a single or double bit

fault depending on the user input. If the simulated ECC error is not detected, then the error

code C90FL_ERROR_ECC_LOGIC is returned.

Prototype

UINT32 FlashECCCLogicCheck (PSSD_CONFIG pSSDConfig,

UINT64 dataVal,

UINT64 errBits,

UINT32 eccValue)

Arguments

Table 49. Arguments for FlashECCLogicCheck()

Argument

Description

Range

pSSDConfig

Pointer to the SSD

Configuration Structure.

The values in this structure are chip-dependent.

Please refer to Section 2.3 for more details.

dataValue

The 64 bits of data for which

the ECC is calculated. The

bits of dataValue are flipped

to generate single or double

bit faults.

Any 64-bit value.

errBits

Is a 64-bit mask of the bits

at which the user intends to

inject error.

Any 64-bit value, except zero.

eccValue

It’s a 32 bit value which has

to be passed by user. This

is calculated using an off

line ECC Calculator.

This is a corresponding ECC value for the data

value passed by the user.

Note: Same data words should be used in off line

ECC calculator and Flash ECC logic check API.

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