SanDisk SD-ROM, Product Manual

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Field Value Comments
CSD_STRUCTURE 1.0 CSD structure
Reserved Reserved
TAAC 1.5ms Data read access time – 1
NSAC 0
Data read access time – 2 in CLK cycles
(NSAC*100)
TRANS_SPEED 25MHz Maximum data transfer rate
CCC 0x5F5 Card Command Classes
READ_BL_LEN 512 bytes Maximum read data block length
READ_BL_PARTIAL Yes Partial blocks for read allowed
WRITE_BLK_MISALIGN No Write block misalignment
READ_BLK_MISALIGN No Read block misalignment
DSR_IMP No DSR implemented
Reserved Reserved
C_SIZE depends on card
size Device Size
VDD_R_CURR_MIN 100mA Maximum read current @VDD minimum
VDD_R_CURR_MAX 80mA Maximum read current @VDD maximum
VDD_W_CURR_MIN 100mA Maximum write current @VDD minimum
VDD_W_CURR_MAX 80mA Maximum write current @VDD maximum
C_SIZE_MULT depends on card
size Device size multiplier
ERASE_BLK_EN Yes Erase single block enable
SECTOR_SIZE 32 blocks Erase sector size
WP_GRP_SIZE 128 sectors Write protect group size
WP_GRP_ENABLE Yes Write protect group enable
Reserved Reserved for MMC compatibility
R2W_FACTOR x16 Write speed factor
WRITE_BL_LEN
512 bytes
Maximum write data block length
WRITE_BL_PARTIAL No Partial blocks for write allowed
FILE_FORMAT_GRP 0 File format group
COPY Has been copied Copy flag (OTP)
PERM_WRITE_PROTECT Not protected Permanent write protection
TMP_WRITE_PROTECT Not protected Temporary write protection
FILE_FORMAT HD w/partition File format
Reserved Reserved
CRC CRC7 CRC
Not used, always “1”
3.3.3 SD Card Configuration Register
The SD Card Configuration Register (SCR) provides information about special features in the
SanDisk SD Card products. For more information, refer to Section 5.6 in the SDA Physical
Layer Specification, Version 2.00.
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