UM1634 datasheet(10/43 Pages) STMICROELECTRONICS

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API specification

UM1634

10/43

DocID024601 Rev 3

The type definition for the structure is given below.

typedef struct _ssd_config

{

UINT32 c90flRegBase;

UINT32 mainArrayBase;

UINT32 mainArraySize;

UINT32 shadowRowBase;

UINT32 shadowRowSize;

UINT32 lowBlockNum;

UINT32 midBlockNum;

UINT32 highBlockNum;

UINT16 pageSize;

UINT32 BDMEnable;

} SSD_CONFIG, *PSSD_CONFIG;

Note:

User has to make sure shadowRowBase always points to Shadow row Base of Bank 0.

Even if the operation is done on Shadow Row of Bank 1, shadowRowBase should have

address of Bank 0 shadow row. Driver code expects shadow row base address of bank 0

only. Driver has the workaround to point to shadow row base of bank 1 when needed (this is

done based on the value set for shadowFlag by the user).

3.4

Callback notification

The Standard Software Driver facilitates the user to supply a pointer to ‘CallBack()’ function

so that time-critical events can be serviced during C90FL Standard Software driver

operations.

Servicing watchdog timers is one such time critical event. If it is not necessary to provide the

CallBack service, the user is able to disable it by a NULL function macro.

Table 3. SSD configuration structure field definition

Parameter name

Type

Parameter description

c90flRegBase

UINT32

The base address of C90FL and BIU control registers.

(Bank0 base address)

mainArrayBase

UINT32

The base address of Flash main array. (Bank0 base address)

mainArraySize

UINT32

The size of Flash main array.

shadowRowBase

UINT32

The base address of shadow row. (Base Address of shadow

row0 (Bank0 shadow row))

shadowRowSize

UINT32

The size of shadow row in byte.

lowBlockNum

UINT32

Block number of the low address space.

midBlockNum

UINT32

Block number of the mid address space.

highBlockNum

UINT32

Block number of the high address space.

pageSize

UINT16

The page size of the C90FL Flash (16 bytes)

BDMEnable

UINT32

Defines the state of background debug mode (enable

/disable)

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