MC2GH256NMCA-2SA00 SAMSUNG [Samsung semiconductor], MC2GH256NMCA-2SA00 Datasheet - Page 26

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

The following sections describe the CSD fields and the relevant data types. If not explicitly defined otherwise, all bit strings
are interpreted as binary coded numbers starting with the left bit first.
• CSD_STRUCTURE
Describes the version of the CSD structure.
• SPEC_VERS
Defines the MultiMediaCard System Specification version supported by the card.
• TAAC
Defines the asynchronous part of the data access time.
• NSAC
Defines the typical case for the clock dependent factor of the data access time. The unit for NSAC is 100 clock cycles.
Therefore, the maximal value for the clock dependent part of the data access time is 25.5k clock cycles.
The total access time N
host for the actual clock rate. The read access time should be interpreted as a typical delay for the first data bit of a data
block or stream.
Revision 0.3
0
1
2
3
0
1
2
3
4
5 - 15
2:0
6:3
7
TAAC bit position
CSD_STRUCTURE
SPEC_VERS
AC
as expressed in Table 23 is calculated based on TAAC and NSAC. It has to be computed by the
Version 1.0-1.2
Version 1.4
Version 2.0 - 2.2
Version 3.1 - 3.2 -3.31
Version 4.0 - 4.1
Reserved
Time unit
0=1ns, 1=10ns, 2=100ns, 3=1µs, 4=10µs, 5=100µs, 6=1ms, 7=10ms
Multiplier factor
0=reserved, 1=1.0, 2=1.2, 3=1.3, 4=1.5, 5=2.0, 6=2.5, 7=3.0, 8=3.5, 9=4.0, A=4.5,
B=5.0, C=5.5, D=6.0, E=7.0, F=8.0
Reserved
CSD version No. 1.0
CSD version No. 1.1
CSD version No. 1.2
Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register
CSD structure version
System Specification Version Number
26
Version 1.0 - 1.2
Version 1.4 - 2.2
Version 3.1 - 3.2 - 3.31 - 4.0 - 4.1
code
Valid for System Specification Version
MultiMediaCard
Sep.22.2005
TM