Media card command pass through methods
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United States of America Patent
Stats
-
Dec 13, 2011
Grant Date -
Jul 16, 2009
app pub date -
Nov 7, 2008
filing date -
Dec 8, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
Methods for transmitting application specific or extended commands between a host and a memory card are disclosed. Commands for an extended card protocol are embedded in messages, along with a marker, in the data or command portion of a base card transmission protocol that is used to communicate between the host and the memory card. This allows for the transmission of application specific commands that lack a corresponding command in the base card protocol. The method can be implemented on the host side at the device driver level or the file level. In order to implement a read command in the extended card protocol, a write command in the base card protocol with an encapsulated read command in the extended protocol is first sent to a logical address, followed by a read command to the same logical address. Message set identifiers associate embedded commands and data received in separate transmissions.
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