HB28K032MM3 Datasheet, PDF (78/91 Pages) Renesas Technology Corp – MultiMediaCard 32 MByte/64 MByte/128 MByte/256 MByte/512 MByte

HB28K032/L064/J128/J256/J512MM3, HB28K032/L064/J128/J256RM3
Short Cut Protection
The MultiMediaCards can be inserted/removed into/from the bus without damage.
If one of the supply pins (V_CC or V_SS) is not connected properly, then the current is drawn through a data
line to supply the card. Naturally the card can not operate properly under this conditions.
V_CC
V_CC not connected
CMD, DAT
V_SS not connected
V_SS
Improper Power Supply
Every MultiMediaCard output withstands shortcuts to either supply.
card
controller
V_CC
I_short
CMD, DAT
I_short
V_SS
connector
Short Cut Protection
card
controller
Unintentional Power Down
If the card removal (unintentional power down) is occurred during card operation (read/write), the
MultiMediaCard would be broken.
Rev.0.02, Sep.15.2004, page 78 of 89