UM1635 datasheet(10/42 Pages) STMICROELECTRONICS

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API specification

UM1635

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DocID024604 Rev 2

2.6

Normal mode functions

2.6.1

FlashInit()

Description

This function reads the Flash configuration information from the Flash control registers and

initialize parameters in SSD configuration structure. ‘FlashInit()’ must be called prior to any

other Flash operations.

Prototype

UINT32 FlashInit (PSSD_CONFIG pSSDConfig);

Arguments

Return values

Troubleshooting

None.

Comments

‘FlashInit()’ checks the C90FL_MCR_RWE and C90FL_MCR_EER bit, and clear them

when any of them is set. If RWE bit is set, Flash program/erase operations can still be

performed.

Assumptions

The user must correctly initialize the fields including c90flRegBase, mainArrayBase,

shadowRowBase, shadowRowSize, pageSize and BDMEnable before passing the structure

to the FlashInit() functions.

2.6.2

FlashErase()

Description

This function erases the enabled blocks in the main array or the shadow row. The relevant

Flash module status is checked, and relevant error code is returned if there is any error.

Table 4. Arguments for FlashInit()

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.

Table 5. Return values for FlashInit()

Type

Description

Possible values

UINT32

Indicates Flash initialization operation is

successful.

C90FL_OK

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