Datasheet

- 12 -
datasheet SD Card
Rev. 1.0
MMBTFxxGWBCA-xMExx
4.3.7 SD Status Register
The SD Status contains status bits that are related to the SD Memory Card proprietary features and may be used for future application specific usage. The
size of the SD Status is one data block of 512bit. The content of this register is transmitted to the Host over the DAT bus along with 16bit CRC. The SD
Status is sent to the host over the DAT bus if ACMD13 is sent (CMD55 followed with CMD13). ACMD13 can be sent to a card only in ’tran_state’ (card is
selected). SD Status structure is described in below. Unused reserved bits shall be set to 0.
[Table 4-9] : SD Status Register
NOTE:
Speed Class that supports Class 10 shall not use the Pm value stored in the SD Status to calculate performance in any fragmented AU. Class 10 Performance is defined only
for entirely free AUs
4.4 SPI Mode Card Registers
Unlike the SD Memory card protocol (where the register contents is sent as command response),reading the contents of the CSD and CID registers in
SPI mode is a simple read-block transaction. The card will respond with a standard response token followed by data block of 16 bytes suffixed with a 16-
bit CRC.
The data timeout for the CSD command cannot be set to the cards TAAC since this value is stored in the card‘s CSD. Therefore, the standard response
timeout value(N
CR) is used for read latency of the CSD register.
4.5 User Capacity
This information table below provides user capacity of Samsung SD/microSD Card.
Product user density is based on SD Formatter 2.0 tool with FAT File system.
SD Formatter 2.0 software formats all SD Cards and SDHC Cards using a formatting program that complies with official SD memory card requirements.
NOTE :
SD or SDHC Card file systems formatted with generic operating system formatting software do not comply with official SD memory card requirement and optimum performance
may not be experienced
Bits Field
Cell
Type
Data Value
4GB 8GB 16GB 4GB 8GB 16GB
511:510 DATA_BUS_WIDTH S R 0x00 1bit width or 4bit width
509 SECURED_MODE S R 0x00 -
508:502 Reserved for Security Functions (Refer to Part 3 Security Specification)
501:496
Reserved
495:480 SD_CARD_TYPE S R 0x0000 Regular SD RD/WR Card
479:448 SIZE_OF_PROTECTED_AREA S R 0x2000000 0x3000000 0x4000000 -
447:440 SPEED_CLASS S R 0x2 0x3 Class 4 Class 6
439:432 PERFORMANCE_MOVE S R 0x2 0x3 2 [MB/sec] 3 [MB/sec]
431:428 AU_SIZE S R 0x9 4MB
427:424
Reserved
423:408 ERASE_SIZE S R 0x10 16 AU
407:402 ERASE_TIMEOUT S R 0x1 1sec
401:400 ERASE_OFFSET S R 0x2 2sec
399:312 Reserved
311:0 Reserved for Manufacturer
Product Number File System Tot. Sector No. User Capacity[Byte]
MMBTF04GWBCA-xMExx
FAT32
7,745,536 3,965,714,432
MMBTF08GWBCA-xMExx 15,540,224 7,956,594,688
MMBTF16GWBCA-xMExx 31,248,384 15,999,172,608