HB28D032MM2 datasheet(21/90 Pages) RENESAS

номер детали	HB28D032MM2

подробное описание детали	MultiMediaCard 16 MByte/32 MByte/64 MByte/128 MByte

PDF	90 Pages

Scroll/Zoom	100%

производитель	RENESAS [Renesas Technology Corp]

домашняя страница	http://www.renesas.com

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21 / 90 page

HB28H016/D032/B064/B128MM2

Rev.5.0, Jan. 2003, page 19 of 88

• DEFAULT_ECC

Set by the card manufacturer and defines the ECC code which is recommended to use (e.g. the device is

tested for). The value is set to ‘0’, indicating that no designated ECC is recommended.

• R2W_FACTOR

Defines the typical block program time as a multiple of the read access time. The following table defines

the field format.

R2W_FACTOR

Multiples of read access time

2 (write half as fast as read)

6, 7

reserved

This parameter value is 2 for these Hitachi MultiMediaCards.

• WRITE_BLK_LEN

The data block length is computed as 2

WRITE_BLK_LEN.

Data Block Length

WRITE_BLK_LEN

Block length

Remark

0 = 1 byte

1 = 2 bytes

......

11 = 2048 bytes

12–15

reserved

The block length might therefore be in the range 1, 2, 4...2048 bytes. This parameter defines the block

length if WRITE_BLK_PARTIAL is not set. If WRITE_BLK_PARTIAL is set this parameter contains the

maximum allowed value of the block length in bytes. All block lengths between one and this value are

permitted. The actual block size is programmed by the command SET_BLOCKLEN (CMD16). These

Hitachi MultiMediaCards support blocks with the length 512 bytes. The parameter WRITE_BLK_LEN is

permanently assigned to the value 0x9 (512 bytes).

HB28D032MM2 датащи(PDF) 21 Page - Renesas Technology Corp