Chapter 3 – iNAND Interface Description
Revision 3.1
SanDisk iNAND Product Manual
© 2006 SanDisk Corporation
3-8
12/07/06
Field CSD
Value
Description
TMP_WRITE_PROTECT
No protected
Temporary write protection
FILE_ FORMAT
HD w/partition
File format
Reserved --- Reserved
CRC CRC7
CRC
---
---
Not used, always “1”
3.4.4 Card
Status
Register
The
Card Status Register (CSR)
transmits the card’s status information (which may be
stored in a local status register) to the host. The CSR is defined in Section
4.10.1
in the
SDA
Physical Layer Specification, Version 2.00
.
3.4.5 SD
Status
Register
The
SD Status Register (SSR)
contains status bits that are related to iNAND proprietary
features and may be used for future applications. The SD Status structure is described in
Section 4.10.2
in the SDA
Physical Layer Specification, Version 2.00
.
3.4.6 Relative
Card
Address
Register
The 16-bit
Relative Card Address (RCA)
Register carries the card address published by
the card during the card identification. Refer to Section 5.4 in the SDA
Physical Layer
Specification, Version 2.00
for more information.
3.4.7
SD Card Configuration Register
The
SD Card Configuration Register (SCR)
is in addition to the CSD Register. The SCR
provides information about special features in SanDisk iNAND. For more information,
refer to
Section 5.6
in the SDA
Physical Layer Specification, Version 2.00
.
3.4.8
SD Card Registers in SPI Mode
All registers are accessible in SPI Mode. Their format is identical to the format in the SD
Bus Mode, however a few fields are irrelevant in SPI Mode. In SPI Mode, the Card Status
Register has a different, shorter, format as well. Refer to
Section 7.4
in the SDA
Physical
Layer Specification, Version 2.00
. for more details.
3.5
Data Interchange Format and Card Sizes
In general, a file system provides structure for iNAND data. The SD Card File System
Specification, published by the SD Association, describes the file format system
implemented in the SanDisk iNAND.
