HB288016MM1 Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HB288016MM1

MultiMediaCard™ 16 MByte

Hitachi -> Renesas Electronics 

HB288016MM1

• 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 16 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 HB288016MM1 is 2 (multiplier = 16).

• 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

HB288016MM1 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.

17

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