MC2GH256NMCA-2SA00 SAMSUNG [Samsung semiconductor], MC2GH256NMCA-2SA00 Datasheet - Page 27

• Manufacturer Part Number: MC2GH256NMCA-2SA00
• Description: SAMSUNG MultiMediaCard
• Manufacturer: SAMSUNG [Samsung semiconductor]

• TRAN_SPEED
The following table defines the clock frequency when not in high speed mode. For cards supporting version 4.0, and
higher, of the specification, the value shall be 20MHz (0x2A):
• CCC
The MultiMediaCard command set is divided into subsets (command classes). The card command class register CCC
defines which command classes are supported by this card. A value of ‘1’ in a CCC bit means that the corresponding com-
mand class is supported. For command class definition refer to Table 6-8.
• READ_BL_LEN
The data block length is computed as 2
(see Chapter 6.10 for details):
• READ_BL_PARTIAL
Defines whether partial block sizes can be used in block read commands.
READ_BL_PARTIAL=0 means that only the READ_BL_LEN block size can be used for block oriented data transfers.
READ_BL_PARTIAL=1 means that smaller blocks can be used as well. The minimum block size will be equal to minimum
addressable unit (one byte)
Revision 0.3
2:0
6:3
7
0
1
......
11
0
1
......
11
12-15
READ_BL_LEN
TRAN_SPEED bit
CCC bit
2 0 = 1 Byte
2 1 = 2 Bytes
2 11 = 2048 Bytes
Reserved
class 0
class 1
class 11
READ_BL_LEN
Frequency unit
0=100KHz, 1=1MHz, 2=10MHz, 3=100MHz,
4...7=reserved
Multiplier factor
0=reserved, 1=1.0, 2=1.2, 3=1.3, 4=1.5, 5=2.0, 6=2.6, 7=3.0, 8=3.5, 9=4.0,
A=4.5, B=5.2, C=5.5, D=6.0, E=7.0, F=8.0
reserved
. The block length might therefore be in the range 1, 2,4...2048 bytes
Supported card command class
27
Block length
Code
MultiMediaCard
Sep.22.2005
TM