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Internal Flash Memory
16-7
16.5.2 Erasure Blocks
The flash memory is partitioned into 32 8 KB erasure blocks. Fig. 16-5-2 shows the configuration of the flash
memory erasure blocks and their correspondence with each of the bits in the erasure block registers that are used to
specify which blocks to erase. After setting the erasure block registers in erasure block setting mode, block erase
mode is used to erase the blocks that correspond to the bits for which "1" was specified in the erasure block
registers.
In all erase mode, all 256 KB memory cells are erased in a single operation.
Fig. 16-5-2 Flash Memory Erasure Blocks
Flash Memory
8 KB Erasure block 0
8 KB Erasure block 1
8 KB Erasure block 2
8 KB Erasure block 3
8 KB Erasure block 4
x'00000
x'02000
x'04000
x'06000
x'08000
8 KB Erasure block 5
8 KB Erasure block 6
8 KB Erasure block 7
8 KB Erasure block 8
8 KB Erasure block 9
x'0A000
x'0C000
x'0E000
x'10000
x'12000
8 KB Erasure block 10
8 KB Erasure block 11
8 KB Erasure block 12
8 KB Erasure block 13
8 KB Erasure block 14
x'14000
x'16000
x'18000
x'1A000
x'1C000
8 KB Erasure block 15
x'1E000
x'1FFFF
EBR0
EBR1
EBR2
EBR3
EBR4
EBR5
EBR6
EBR7
EBR8
EBR9
EBR10
EBR11
EBR12
EBR13
EBR14
EBR15
Erasure block
register
Flash Memory
8 KB Erasure block 16
8 KB Erasure block 17
8 KB Erasure block 18
8 KB Erasure block 19
8 KB Erasure block 20
x'20000
x'22000
x'24000
x'26000
x'28000
8 KB Erasure block 21
8 KB Erasure block 22
8 KB Erasure block 23
8 KB Erasure block 24
8 KB Erasure block 25
x'2A000
x'2C000
x'2E000
x'30000
x'32000
8 KB Erasure block 26
8 KB Erasure block 27
8 KB Erasure block 28
8 KB Erasure block 29
x'34000
x'36000
x'38000
x'3A000
x'3C000
8 KB Erasure block 31
x'3E000
x'3FFFF
EBR16
EBR17
EBR18
EBR19
EBR20
EBR21
EBR22
EBR23
EBR24
EBR25
EBR26
EBR27
EBR28
EBR29
EBR30
EBR31
Erasure block
register
8 KB Erasure block 30