Datasheet

S
S
S
D
D
D
H
H
H
C
C
C
1
1
1
0
0
0
C
C
C
a
a
a
r
r
r
d
d
d
s
s
s
e
e
e
r
r
r
i
i
i
e
e
e
s
s
s
Rev. 1.0
4~32GB High Capacity Secure Digital Card
Transcend Information Inc.
22
The basic rule of setting this field:
SDSC Card sets this field to 2 (Version 1.01)
SDHC Card sets this field to 3 (Version 2.00).
SDXC Card sets this field to 4 (Version 3.xx).
Note that it is mandatory for a regular writable SD Memory Card to support Security Protocol.
•
SD_BUS_WIDTHS
Describes all the DAT bus widths that are supported by this card.
SD_BUS_WIDTHS Supported Bus Widths
Bit 0 1 bit (DAT0)
Bit 1 reserved
Bit 2 4 bit (DAT0-3)
Bit 3 reserved
SD Memory Card Supported Bus Widths
Since SD Memory Card shall support at least the two bus modes 1bit or 4bit width then any SD Card shall set at least
bits 0 and 2 (SD_BUS_WIDTH="0101").