Datasheet

m
m
m
i
i
i
c
c
c
r
r
r
o
o
o
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
Ver 1.1
4~16G High Capacity microSD Card
Transcend Information Inc.
21
• SD_SECURITY
This field indicates CPRM Security Specification Version for each capacity card. The definition of
Protected Area
is different in each capacity card.
SD_SECURITY CPRM Security Version
0 No Security
1 Not Used
2 SDSC Card (Security Version 1.01)
3 SDHC Card (Security Version 2.00)
4 SDXC Card (Security Version 3.xx)
5 - 7 Reserved
CPRM Security Version
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. For ROM (Read
Only) and OTP (One Time Programmable) types of the SD Memory Card, the security feature is optional.
• 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").