
3-12 SanDisk miniSD Card Product Manual, Rev. 1.1 © 2003 SANDISK CORPORATION
OCR Bit VDD Voltage Window
21 3.3-3.4
22 3.4-3.5
23 3.5-3.6
24-30 reserved
31 Card power up status bit (busy)
The level coding of the OCR register is as follows:
• Restricted voltage windows=LOW
• Card busy=LOW (bit 31)
The least significant 31 bits are constant and will be set as described in Figure 3-9. If bit 32 (the busy bit) is set, it
informs the host that the card power up procedure is finished.
Figure 3-9. OCR Structure
3.5.2. Card Identification (CID) Register
The CID register is 16 bytes long and contains a unique card identification number as shown in Table 3-8. It is
programmed during card manufacturing and cannot be changed by miniSD Card hosts. Note that the CID register in
the miniSD Card has a different structure than the CID register in the MultiMediaCard.
Table 3-8. CID Fields
Name Type Width CID—Slice Comments CID Value
Manufacturer ID (MID) Binary 8 [127:120] The manufacturer IDs are controlled
and assigned by the SD Card
Association.
0x03
OEM/Application ID (OID) ASCII 16 [119:104] Identifies the card OEM and/or the
card contents. The OID is assigned
by the 3C.*
SD ASCII Code 0x53, 0x44
Product Name (PNM) ASCII 40 [103:64] 5 ASCII characters long SD256, SD128, SD064,
SD032, SD016
Product Revision** (PRV) BCD 8 [63:56] Two binary coded decimal digits Product Revision (55)
Serial Number (PSN) Binary 32 [55:24] 32 Bits unsigned integer Product Serial Number
Reserved 4 [23:20]
Manufacture Date Code (MDT) BCD 12 [19:8] Manufacture date–yym (offset from
2000)
Manufacture date (for
example: Apr 2001 = 0x014)
CRC7 checksum*** (CRC) Binary 7 [7:1] Calculated CRC7
00
24 0
80
8 7 4 3
FF
16
Reserve
Operatin
Voltage
2.7 – 3.6
Reserve
Busy
0 0
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