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UM1627 Datasheet(PDF) 24 Page - STMicroelectronics

Part # UM1627
Description  Standard software driver for C90LC Flash
PDF  38 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UM1627 Datasheet(HTML) 24 Page - STMicroelectronics

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API specification
UM1627
24/38
DocID024497 Rev 2
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. For either
Low/Mid/High address spaces, if blocks corresponding to valid block lock state bits are not
present (due to configuration or total memory size), values for these block lock state bits are
always 1 because such blocks are locked by hardware on reset. These blocks cannot be
unlocked by software with ‘SetLock()’ function.
The following diagrams give an example of the block bitmap definitions of blkLockState for
shadow/Low/Mid/High address spaces. Refer to Appendix C: Documentation references for
the valid bits configuration depending from the specific microcontroller Flash module
sectors.
Assumptions
It assumes that the Flash block is initialized using a ‘FlashInit()’ API.
Table 36. blkLockState bit allocation for shadow address space
MSB
LSB
bit 31
…
bit 1
bit 0
reserved
…
reserved
shadow row
Table 37. 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 38. blkLockState bit allocation for mid address space
MSB
LSB
bit 31
…
bit 4
bit 3
bit 2
bit 1
bit 0
reserved
…
reserved
reserved
reserved
block 1
block 0
Table 39. 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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