hb28b128mm2 Renesas Electronics Corporation., hb28b128mm2 Datasheet - Page 16

• Manufacturer Part Number: hb28b128mm2
• Description: Multimediacard 16 Mbyte/32 Mbyte/64 Mbyte/128 Mbyte
• Manufacturer: Renesas Electronics Corporation.

HB28H016/D032/B064/B128MM2
• TRAN_SPEED
The following table defines the maximum data transfer rate TRAN_SPEED:
Maximum Data Transfer Rate Definition
TRAN_SPEED bit
2:0
6:3
7
These Hitachi MultiMediaCards support a transfer rate between 0 and 20 Mbit/s. The parameter
TRAN_SPEED is 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 set CCC bit means that the
corresponding command class is supported. For command class definition refer to Table “Command
Classes”.
Supported Card Command Classes
CCC bit
0
1
......
11
These Hitachi MultiMediaCards support the command classes 0, 1, 2, 3, 4, 5, 6 and 7. The parameter CCC
is permanently assigned to the value 0x0FF.
Rev.5.0, Jan. 2003, page 14 of 88
Description
transfer rate exponent
time mantissa
reserved
Supported card command classes
class0
class1
......
class11
Values
0 = 100 kbit/s, 1 = 1 Mbit/s, 2 = 10
Mbit/s, 3 = 100 Mbit/s, 4...7 =
reserved
0x0 = reserved, 0x1 = 1.0, 0x2 =
1.2, 0x3 = 1.3, 0x4 = 1.5, 0x5 = 2.0,
0x6 = 2.5, 0x7 = 3.0, 0x8 = 3.5, 0x9
= 4.0, 0xA = 4.5, 0xB = 5.0, 0xC =
5.5, 0xD = 6.0, 0xE = 7.0, 0xF = 8.0
always ’0’