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5.2
Card Identification Mode
All
the
data
communication in the
Identification Mode uses only the command line
(CMD).
Figure 5-1 MultiMediaCard State Diagram (Card Identification Mode)
5.2.1
Reset
GO_IDLE_STATE (CMD0) is the software reset
command and sets all MultiMediaCards to Idle
State
regardless of the
MultiMediaCards
in Inactive
affected by this command.
After power-on by the host, all MultiMediaCards
are in Idle State, including the cards that were in
Inactive State. Note that at least 74 clock cycles
are required prior to starting bus communication.
SanDisk MultiMediaCard Product Manual Rev. 2 © 2000 SANDISK CORPORATION
Card
current card
state.
State
are not
MultiMediaCard Product Manual
After power-on or CMD0, all MultiMediaCards'
output bus drivers are in a high-impedance state.
The host drives the bus at the identification clock
rate f
(generated by a push-pull driver stage).
OD
39
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