參數(shù)資料
型號(hào)： 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(yè)數(shù)： 32/88頁(yè)
文件大?。?/td> 329K
代理商： HB28D032MM2
HB28E016/D032/D064/B128MM2
32
Card identification mode
All the data communication in the card identification mode uses only the command line (CMD).
Idle state
(idle)
CMD0
CMD15
CMD1
Inactive state
(ina)
Ready state
(ready)
CMD2
Identification state
(ident)
CMD3
Stand-by state
(stby)
card wins bus
from all states except (ina)
from all states in data-transfer mode
Power on
card looses bus
card is busy or
host omitted
voltage range
cards with non-compatible voltage range
data-transfer mode
card-identification mode
MultiMediaCard State Diagram
(Card Identification Mode)
The host starts the card identification process in open drain mode with the identification clock rate f
OD
(generated by a push pull driver stage). The open drain driver stages on the CMD line allow the parallel
card operation during card identification. After the bus is activated the host will request the cards to send
their valid operation conditions with the command SEND_OP_COND (CMD1). Since the bus is in open
drain mode, as long as there is more than one card with operating conditions restrictions, the host gets in
the response to the CMD1 a “wired or” operation condition restrictions of those cards. The host then must
pick a common denominator for operation and notify the application that cards with out of range
parameters (from the host perspective) are connected to the bus. Incompatible cards go into Inactive State
(refer to also Chapter “Operating Voltage Range Validation”). The busy bit in the CMD1 response can be
used by a card to tell the host that it is still working on its power-up/reset procedure (e.g. downloading the
register information from memory field) and is not ready yet for communication. In this case the host must
repeat CMD1 until the busy bit is cleared. After an operating mode is established, the host asks all cards
for their unique card identification (CID) number with the broadcast command ALL_SEND_CID (CMD2).
All not already identified cards (i.e. those which are in Ready State) simultaneously start sending their CID
numbers serially, while bit-wise monitoring their outgoing bitstream. Those cards, whose outgoing CID
相關(guān)PDF資料
PDF描述
HB28D064MM2 MultiMediaCard 16 Mbyte/32 Mbyte/64 Mbyte/128 MByte
HB28E016MM2 MultiMediaCard 16 Mbyte/32 Mbyte/64 Mbyte/128 MByte
HB28C048A6 FLASH ATA Card
HB28C048C6 CompactFlash⑩
HB28C016A6 FLASH ATA Card
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HB2A102K-S265B 制造商:Hitano Enterprise Corp 功能描述:Bulk
HB2A102K-S565B 制造商:Hitano Enterprise Corp 功能描述:Bulk
HB2A103K-S565B 制造商:Hitano Enterprise Corp 功能描述:
HB2A122K-S265B 制造商:Hitano Enterprise Corp 功能描述:
HB2A122K-S565B 制造商:Hitano Enterprise Corp 功能描述:Bulk
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