UM1634 datasheet(12/43 Pages) STMICROELECTRONICS

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API specification

UM1634

12/43

DocID024601 Rev 3

3.6

Normal mode functions

3.6.1

FlashInit()

Description

The 'FlashInit()' API reads the Flash configuration information from the Flash control

registers and initialize parameters in SSD configuration structure. The user gets low block

number as sum of LAS and MAS blocks of bank0, mid block number as sum of LAS and

MAS blocks of bank1, high block number remains the same as the high blocks in bank0 or

bank1. Two HAS blocks (one each from Bank0 and Bank1 (size 256 KB each)) are

combined to form one logical HAS block (512 KB). Main array size is returned to the user as

sum of the size of the 2 banks. 'FlashInit()' must be called prior to any other flash operations

Prototype

UINT32 FlashInit (PSSD_CONFIG pSSDConfig);

Arguments

Return values

Comments

The 'FlashInit()' will check the C90FL_MCR_RWE and C90FL_MCR_EER bits, and clear

them when any of them is set.

Assumptions

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

shadowRowBase, shadowRowSize, pageSize and BDMEnable before passing the structure

to the FlashInit() functions.

Table 5. 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 3.3 for more details.

Table 6. Return values for FlashInit()

Return Values

Possible Causes

Solution

C90FL_OK

Successful completion

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