UM1635 datasheet(32/42 Pages) STMICROELECTRONICS

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API specification

UM1635

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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 the ‘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. Bit allocation for blocks in middle address space

MSB

LSB

bit 31

…

bit 4

bit 3

bit 2

bit 1

bit 0

reserved

…

reserved

block 1

block 0

Table 50. Bit allocation for blocks in high address space

MSB

LSB

bit 31

…

bit 6

bit 5

bit 4

…

bit 1

bit 0

reserved

…

reserved

block 5

block 4

…

Block 1

Block 0

Table 51. 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.

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