HB288064MM1 Datasheet, PDF (13/79 Pages) Hitachi Semiconductor – MultiMediaCard 64 MByte

HB288064MM1
• 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
Description
transfer rate exponent 0 = 100 kbit/s, 1 = 1 Mbit/s, 2 = 10 Mbit/s, 3 = 100
Mbit/s, 4...7 = reserved
time mantissa 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
reserved = ’0’
The HB288064MM1 supports 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 “HB288064MM1
Command Classes”.
Supported Card Command Classes
CCC bit
0
1
......
11
Supported card command classes
class0
class1
......
class11
The HB288064MM1 supports the command classes 0, 1, 2, 3, 4, 5, 6 and 7. The parameter CCC is
permanently assigned to the value 0x0FF.
13