UM1634 datasheet(28/43 Pages) STMICROELECTRONICS

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API specification

UM1634

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DocID024601 Rev 3

Assumptions

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

3.6.10

SetLock()

Description

The 'SetLock()' API sets the block lock state for Shadow/Low/Middle/High address space on

the C90FL module to protect them from program/erase. The API provides password to

enable block lock register writes when is needed and write the block lock value to block lock

Prototype

UINT32 SetLock (PSSD_CONFIG pSSDConfig,

UINT8 blkLockIndicator,

UINT32 blkLockState,

UINT32 password);

Arguments

Table 34. blkLockState bit allocation for high address space

MSB

LSB

bit 31

…

bit 6

bit 5

bit 4

…

bit 1

bit 0

reserved

…

reserved

block 5

block 4

…

block 1

block 0

Table 35. Arguments for SetLock()

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.

blkLockIndicator

Indicating the address

space and the protection

level of the block lock

Refer to Table 30 for valid codes for this parameter.

blkLockState

The block locks to be set to

the specified address

space and protection level.

Bit mapped value indicating the lock status of the

specified protection level and address space.

1: The block is locked from program/erase.

0: The block is ready for program/erase

password

A password is required to

enable the block lock

Correct passwords for block lock registers are

0xA1A1_1111 for Low/Mid Address Space Block

Locking Register, 0xC3C3_3333 for Secondary

Low/Mid Address Space Block Locking Register,

and 0xB2B2_2222 for High Address Space Block

Select Register.

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