hb28d064mm2 Renesas Electronics Corporation., hb28d064mm2 Datasheet - Page 24

• Manufacturer Part Number: hb28d064mm2
• Description: Multimediacard 16 Mbyte/32 Mbyte/64 Mbyte/128 Mbyte
• Manufacturer: Renesas Electronics Corporation.

HB28E016/D032/D064/B128MM2
Commands
The command set of the MultiMediaCard system is divided into classes corresponding to the type of card
(see also [1]). These Hitachi MultiMediaCards support the following command classes:
Command Classes (Class 0 to Class 2 and Class 4)
Card command
class (CCC)
Class 0
Class 1
Class 2
Class 4
Command Classes (Class 2 to Class 7)
Card command
class (CCC)
Class 2
Class 3
Class 4
Class 5
Class 6
Class 7
Class 0 is mandatory and supported by all cards. It represents the card identification and initialization
commands, which are intended to handle different cards and card types on the same bus lines. The Card
Command Class (CCC) is coded in the card specific data register of each card, so that the host knows how
to access the card. There are four kinds of commands defined on the MultiMediaCard bus:
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broadcast commands (bc) sent on CMD line, no response
broadcast commands with response (bcr) sent on CMD line, response (all cards simultaneously) on
CMD line
addressed (point-to-point) commands (ac) sent on CMD line, response on CMD line
addressed (point-to-point) data transfer commands (adtc) sent on CMD line, response on CMD line,
data transfer on DAT line
Class description
block read
stream write
block write
erase
write protection
lock card
Class description
basic
stream read
block read
block write
Supported commands
20 23 24 25 26 27 28 29 30 32 33 34 35 36 37 38 42
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Supported commands
0
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1
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2
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3
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4
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7
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9
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10 11 12 13 15 16 17 18
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