參數(shù)資料
型號(hào)： HB28K032MM3
廠商： Renesas Technology Corp.
英文描述： MultiMediaCard 32 MByte/64 MByte/128 MByte/256 MByte/512 MByte
中文描述： 多媒體32 MByte/64 MByte/128 MByte/256 MByte/512字節(jié)
文件頁(yè)數(shù)： 33/91頁(yè)
文件大?。?/td> 526K
代理商： HB28K032MM3
HB28K032/L064/J128/J256/J512MM3, HB28K032/L064/J128/J256RM3
Rev.0.02, Sep.15.2004, page 33 of 89
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 loses 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
bits do not match the corresponding bits on the command line in any one of the bit periods, stop sending
相關(guān)PDF資料
PDF描述
HB28K032RM3 MultiMediaCard 32 MByte/64 MByte/128 MByte/256 MByte/512 MByte
HB28L064MM3 MultiMediaCard 32 MByte/64 MByte/128 MByte/256 MByte/512 MByte
HB28J512MM3 MultiMediaCard 32 MByte/64 MByte/128 MByte/256 MByte/512 MByte
HB3104AD 128Kx8 EEPROM
HB3104AL 128Kx8 EEPROM
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
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HB2A103K-S565B 制造商:Hitano Enterprise Corp 功能描述:
HB2A122K-S265B 制造商:Hitano Enterprise Corp 功能描述:
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