HB28B064MM2 RENESAS [Renesas Technology Corp], HB28B064MM2 Datasheet - Page 26
HB28B064MM2
Manufacturer Part Number
HB28B064MM2
Description
MultiMediaCard 16 MByte/32 MByte/64 MByte/128 MByte
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HB28B064MM2.pdf
(90 pages)
- Current page: 26 of 90
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HB28H016/D032/B064/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)
Card command
class (CCC)
Class 0
Class 1
Class 2
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:
• broadcast commands (bc) sent on CMD line, no response
• broadcast commands with response (bcr) sent on CMD line, response (all cards simultaneously) on
• 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,
Rev.5.0, Jan. 2003, page 24 of 88
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
Supported commands
20 23 24 25 26 27 28 29 30 32 33 34 35 36 37 38 42
+
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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