UM1620 datasheet(21/41 Pages) STMICROELECTRONICS

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UM1620

API specification

Return values

Troubleshooting

None.

Comments

After calling ‘FlashSuspend()’, read is allowed on both main array space and shadow row

without any Read-While-Write error. But data read from the blocks targeted for programming

or erasing is indeterminate even if the operation is suspended.

This function should be used together with ‘FlashResume()’. The suspendFlag returned by

‘FlashSuspend()’ determine whether ‘FlashResume()’ needs to be called or not. If

suspendFlag is TRUE, ‘FlashResume()’ must be called symmetrically to resume the

suspended operation.

Following table defines and describes various suspend states and associated suspend

codes.

Table 25. Return values for FlashSuspend()

Type

Description

Possible values

UINT32

Successful completion.

C90FL_OK

Table 26. suspendState definitions

Argument

Code

Description

Valid operation after suspend

NO_OPERTION

There is no program/erase

operation.

Erasing operation, programming

operation and read are valid on

both main array space and

shadow row.

PGM_WRITE

There is a program

sequence in interlock write

stage.

Only read is valid on both main

array space and shadow row.

ERS_WRITE

There is an erase sequence

in interlock write stage.

Only read is valid on both main

array space and shadow row.

ERS_SUS_PGM_WRITE

There is an erase-suspend

program sequence in

interlock write stage.

Only read is valid on both main

array space and shadow row.

PGM_SUS

The program operation is in

suspended state.

Only read is valid on both main

array space and shadow row.

ERS_SUS

The erase operation on

main array is in suspended

state.

Programming operation is valid

only on main array space. Read

is valid on both main array space

and shadow row.

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