參數(shù)資料
型號： HB28D032MM2
廠商： Hitachi,Ltd.
英文描述： MultiMediaCard 16 Mbyte/32 Mbyte/64 Mbyte/128 MByte
中文描述： 多媒體16 Mbyte/32 Mbyte/64 Mbyte/128字節(jié)
文件頁數(shù)： 8/88頁
文件大小： 329K
代理商： HB28D032MM2
HB28E016/D032/D064/B128MM2
8
Registers
These Hitachi MultiMediaCards contain the following information registers:
Name
Width
Type
Description
OCR
32
Programmed by the
manufacturer.
Read only for user
Supported voltage range, card power up status bit
CID
128
Programmed by the
manufacturer.
Read only for user
Card identification number, card individual number for
identification.
RCA
16
Programmed during
initialization, not readable
Relative card address, local system address of a card,
dynamically assigned by the host during initialization.
CSD
128
Programmed by the
manufacturer. Partially
programmable by the user.
Card specific data, information about the card operation
conditions.
The CID and RCA are used for identifying and addressing the MultiMediaCard. The CSD contains the
card specific data record. This record is a set of information fields to define the operation conditions of the
MultiMediaCard.
For the user, the CID is read only register. The CSD contains read only area and some of one time or
multiple programmable area by the customer or provider. They are read out by special commands (refer to
Chapter “Commands”). The RCA registers are write only registers. Unlike CID and CSD, RCA looses its
contents after powering down the card. Its value is reassigned in each initialization cycle. The
MultiMediaCard registers usage in SPI mode is summarized in Table “MultiMediaCard Registers in SPI
Mode”:
MultiMediaCard Registers in SPI Mode
Name
Available in SPI mode Width (Bytes)
Description
OCR
Yes
4
Operation condition register.
CID
Yes
16
Card identification data (serial number, manufacturer ID
etc.)
RCA
No
CSD
Yes
16
Card specific data, information about the card operation
conditions.
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