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Power Down and Power Cycle
(1) When the host shuts down the power, the card VDD shall be lowered to less than 0.5Volt for a
minimum period of 1ms. During power down, DAT, CMD, and CLK should be disconnected or driven
to logical 0 by the host to avoid a situation that the operating current is drawn through the signal
lines.
(2) If the host needs to change the operating voltage, a power cycle is required. Power cycle means the
power is turned off and supplied again. Power cycle is also needed for accessing cards that are
already in Inactive State. To create a power cycle the host shall follow the power down description
before power up the card (i.e. the card VDD shall be once lowered to less than 0.5Volt for a
minimum period of 1ms).
Specifications subject to change without notice, contact your sales representatives for the most update information.
REV 0.3
Industrial Class 10 Micro SD Card
Page 13 of 22
SQFlash
May. 4, 2016
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