User Manual

TriFlash Interface Description
TriFlash with SD Interface Product Manual (Preliminary), Rev. 1.2 © 2002/2003 SANDISK CORPORATION
3-25
Bits Identifier Typ
e
Value Description Clear
Cond.
448 units of
MULT*BLOCK_LEN
refer to CSD register.
actual area=(SIZE_OF_PROTECTED_
AREA) * MULT * BLOCK_LEN.
447:
312
Reserved
311:
0
Reserved for Manufacturer
3.5.7. RCA Register
The 16-bit relative card address register carries the device address that is published by the device during the card
identification. This address is used for the addressed host-device communication after the card identification
procedure.
3.5.8. TriFlash Registers in SPI Mode
In SPI mode, all the device’s registers are accessible. Their format is identical to the format in the SD 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 the SPI Protocol section for
more details.
3.6. Standard Data Interchange Format and Card Sizes
In general, TriFlash data is structured by means of a file system. The SD Memory Card File System Specification,
published by the SD Association, describes the file format system that is implemented in the SD-interface TriFlash.
Since the SD-TriFlash does not contain Security Protected Area, the formatted size is slightly larger than the SD
Memory Card. Table 3-30 shows the parameter associated with different capacities.
Table 3-30. Parameters for SD-TriFlash DOS Image
Capacity Total
LBAs
No. of Partition
Sys. Area Sectors
Total Partition
Sectors
User Data
Sectors
User Data
Bytes
128 Mb 31,360 39 31,303 31,264 16,007,168
256 Mb 62,720 45 62,669 62,624 32,063,488
512 Mb 125,440 57 125,401 125,344 64,176,128
1024 Mb 250,880 95 250,783 250,688 128,352,256
3.6.1. Data Interchange Format and Card Sizes with Optional Security
In general, TriFlash data is structured by means of a file system. The SD Memory Card File System Specification,
published by the SD Association, describes the file format system that is implemented in the SD-interface TriFlash.
In general, each TriFlash is divided into two separate DOS-formatted partitions as follows: