UM1635 datasheet(33/42 Pages) STMICROELECTRONICS

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UM1635

API specification

Return values

Troubleshooting

The trouble shooting given here comprises of hardware errors and input parameter error.

Comments

Depending on the errBits value, a single or double bit faults are simulated. When a Flash

read is done, if the simulated error has not occurred, then the API returns the error code

C90FL_ERROR_ECC_LOGIC.

Assumptions

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

2.7.3

FactoryMarginReadCheck()

Description

This function checks the Factory Margin reads of the Flash. The user specified margin level

is used for reads and the operation is done on the specified blocks. The MISR values

calculated by the hardware is compared to the values passed by the user, if they are not the

same, then an error code is returned.

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 by using an

offline ECC Calculator.

This is a corresponding ECC value for the data

value passed by the user.

Note: Same data words should be used in offline

ECC calculator and Flash ECC logic check API.

Table 51. Arguments for FlashECCLogicCheck() (continued)

Argument

Description

Range

Table 52. Return values for FlashECCLogicCheck()

Type

Description

Possible values

UINT32

Successful completion or error value.

C90FL_OK

C90FL_ERROR_ECC_LOGIC

Table 53. Troubleshooting for FlashECCLogicCheck()

Returned error bits

Possible causes

Solution

C90FL_ERROR_ECC_LOGIC

The ECC value calculated by the user is

incorrect.

Re-calculate the ECC values using

the correct Data.

Hardware is failure

Hardware Error.

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