HB288064MM1 Datasheet, PDF (17/79 Pages) Hitachi Semiconductor – MultiMediaCard 64 MByte

HB288064MM1
• C_SIZE_MULT
This parameter is used for coding a factor MULT for computing the total device size (refer to “C_SIZE”).
The factor MULT is defined as 2 . ^{C_SIZE_MULT+2}
Multiply Factor for the Device Size
C_SIZE_MULT
0
1
2
3
4
5
6
7
MULT
2² = 4
2³ = 8
2⁴ = 16
2⁵ = 32
2⁶ = 64
2⁷ = 128
2⁸ = 256
2⁹ = 512
Remark
The card capacity is 64 MBytes. The value of the parameter C_SIZE_MULT used in the formula to
calculate the card capacity (refer to parameter “C_SIZE”) for the HB288064MM1 is 4 (multiplier = 64).
• SECTOR_SIZE
The size of an erasable or write protection sector. The content of this register is a binary coded value
defining the number of write blocks (refer to “WRITE_BLK_LEN”) of a sector. The sector size of the
HB288064MM1 is set to 0 (= one write block = 512 bytes).
• ERASE_GROUP_SIZE
The size of an erasable group. The content of this register is a binary coded value defining the number of
sectors (refer to “SECTOR_SIZE”) of a group. This parameters value is 15 which means a group size of
(15+1)*512 bytes = 8 kByte.
• WP_GRP_SIZE
The size of a write protection group. The content of this register is a binary coded value defining the
number of sectors (refer to “SECTOR_SIZE”) of a group. This parameters value is 1 which means a group
size of (1+1)*(ERASE_GROUP_SIZE) = 16 kByte.
• WP_GRP_ENABLE
The value is set to ‘1’, meaning group write protection is enabled.
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