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Siemens AG Semiconductors
Version 5.2
Confidential
20/10/1998
13
and MultiMediaCard bus interfaces for a block read command.
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The following table defines the MultiMediaCard bus interface of the adapter.
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The adapter operations on the adapter interface reflect the MultiMediaCard bus protocol. Each
operation on the adapter interface begins with a command and is followed by zero or more data
bytes. Derived from the MultiMediaCard bus protocol the following adapter operation types are
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1)Direction and mode: I - input; O - output; IO - inout; PP - push-pull; 3-state driver
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CMD
CLK
DAT
VDD
IO (3-state)
O (PP)
IO (3-state)
O (PP)
Command/Response
Clock
Data
Controls the power supply of the MultiMediaCard bus. Is disabled for reset
and power-down operations.
Controls the programming power supply of the MultiMediaCard bus. Must be
enabled, if a MultiMediaCard requires an external programming voltage.
control signal for the open drain pull-up resistor;
&0'
line mode indicator (open drain - high, push pull - low)
&0'
direction indicator; read - high, write - low
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direction indicator; read - high, write - low
VPP
O (PP)
ROD
O (PP)
CMD_RW
DAT_RW
O (PP)
O (PP)
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from
application
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data from
adapter
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&0'
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from
adapter
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from
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