HB28K032MM3 Datasheet, PDF (25/91 Pages) Renesas Technology Corp – MultiMediaCard 32 MByte/64 MByte/128 MByte/256 MByte/512 MByte

HB28K032/L064/J128/J256/J512MM3, HB28K032/L064/J128/J256RM3
Commands
The command set of the MultiMediaCard system is divided into classes corresponding to the type of card
(see also [1]). These Renesas MultiMediaCards support the following command classes:
Command Classes (class 0 to class 2)
Supported commands
Card command
0 1 2 3 4 7 9 10 11 12 13 15 16 17 18
class (CCC)
Class description
class 0
basic
++++++++
+++
class 1
stream read
+
class 2
block read
+++
Command Classes (class 2 to class 7)
Supported commands
Card command
20 23 24 25 26 27 28 29 30 32 33 34 35 36 37 38 42
class (CCC) Class description
class 2
block read
+
class 3
stream write
+
class 4
block write
+++++
class 5
erase
++
+
class 6
write protection
+++
class 7
lock card
+
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
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
Rev.0.02, Sep.15.2004, page 25 of 89