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.
12
1) This bit is valid only when the card power up status bit is set.
2) This bit is set to LOW if the card has not finished the power up routine.
3) Only UHS-I card supports this bit.
A voltage range is not supported if the corresponding bit value is set to LOW. As long as the card is busy, the
corresponding bit (31) is set to LOW.
2. CID Register
The Card Identification (CID) register is 128 bits wide. It contains the card identification information used during the
card identification phase. Every individual flash card shall have a unique identification number. The structure of the
CID register is defined in the following paragraphs:
Name Field Width CID-slice
Manufacturer ID MID 8 [127:120]
OEM/Application ID OID 16 [119:104]
Product name
PNM
40
[103:64]
Product revision PRV 8 [63:56]
Product serial number PSN 32 [55:24]
reserved -- 4 [23:20]
Manufacturing date MDT 12 [19:8]
CRC7 checksum CRC 7 [7:1]
not used, always 1 - 1 [0:0]
The CID Fields
•
MID
An 8-bit binary number that identifies the card manufacturer. The MID number is controlled, defined, and allocated to
a SD Memory Card manufacturer by the SD-3C, LLC. This procedure is established to ensure uniqueness of the CID
register.
•
OID
A 2-character ASCII string that identifies the card OEM and/or the card contents (when used as a
distribution media either on ROM or FLASH cards). The OID number is controlled, defined, and allocated
to a SD Memory Card manufacturer by the SD-3C, LLC. This procedure is established to ensure
uniqueness of the CID register.