UM1635 datasheet(25/42 Pages) STMICROELECTRONICS

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UM1635

API specification

determines the final lock status for that block. For high address space there is only one

block lock level.

The output parameter blkLockState returns a bit-mapped value indicating the block lock

status of the specified locking level and address space. A main array block or shadow row is

locked from program/erase if its corresponding bit is set.

The indicated address space determines the valid bits of blkLockState. The following

diagrams show the block bitmap definitions of blkLockState for shadow/Low/Mid/High

address spaces.

For low address space valid bits are from bit 0 to bit (lowBlockNum – 1). In which,

lowBlockNum is the number of low blocks returned from FlashInit();

For middle address space valid bits are from bit 0 and bit (midBlockNum – 1). In which,

midBlockNum is the number of middle blocks returned from FlashInit();

For high address space valid bits are from bit 0 to bit (highBlockNum – 1). In which,

highBlockNum is the number of high blocks returned from FlashInit();

For shadow row valid bit is bit 0;

For example, below are bit allocations for blocks in Low/Mid/High Address Space of

SPC56ELx:

blkLockState Bit Allocation for Shadow Address Space:

Table 35. blkLockState bit allocation for shadow address space

MSB

LSB

bit 31

…

bit 1

bit 0

reserved

…

reserved

shadow row

Table 36. blkLockState bit allocation for low address space

MSB

LSB

bit 31

…

bit 10

bit 9

bit 8

…

bit 1

bit 0

reserved

…

reserved

block 9

block 8

…

block 1

block 0

Table 37. blkLockState bit allocation for mid address space

MSB

LSB

bit 31

…

bit 4

bit 3

bit 2

bit 1

bit 0

reserved

…

reserved

block 1

block 0

Table 38. 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

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