Instruction Manual
503 Series Industrial Grade CompactFlash Card Product Manual v2.1Cactus Technologies
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1.2.3. Intelligent Power Management
Cactus Technologies Industrial CF cards employ sophisticated power management algorithms to
conserve power. Upon completion of a command, the card will automatically enter sleep mode
if no further commands are received. In most situations, the card will be in sleep mode except
when the host is accessing it, thus conserving power. The delay from command completion to
entering sleep mode can be adjusted.
When the card is in sleep mode, any command issued to the card will cause it to exit sleep
and respond.
1.2.4. Power Supply Requirements
This is a dual voltage product, which means it will operate at a voltage range of 3.30 volts ±10%
or 5.00 volts ± 10%. Per the PCMCIA specication Section 2.1.1, the host system must apply 0
volts in order to change a voltage range. This same procedure of providing 0 volts to the card is
required if the host system applies an input voltage outside the desired voltage by more than
20%. This means less than 4.0 volts for the 5.00 volt range and less than 2.70 volts for the 3.30
volt range.