SLSD512BSIU STEC, SLSD512BSIU Datasheet - Page 17

• Manufacturer Part Number: SLSD512BSIU
• Manufacturer: STEC
• Type: SD Cardr

Specifications of SLSD512BSIU

• Density: 512MByte
• Operating Supply Voltage (typ): 3.3V
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Package Type: Not Required
• Pin Count: 9
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Programmable: Yes
• Lead Free Status / Rohs Status: Compliant

SLSDxxxBS(I)U
4.2.3 Mode Selection
The SD Memory Card wakes up in the SD mode. It will enter SPI mode if the CS signal is asserted
(negative) during the reception of the reset command (CMD0) and the card is in idle_state. If the card
recognizes that the SD mode is required it will not respond to the command and remain in the SD mode.
If SPI mode is required the card will switch to SPI and respond with the SPI mode R1 response.
The only way to return to the SD mode is by entering the power cycle. In SPI mode the SD Memory Card
protocol state machine is not observed. All the SD Memory Card commands supported in SPI mode are
always available.
During the initialization sequence, if the host gets Illegal Command indication for ACMD41 sent to the
card, it may assume that the card is MultiMediaCard. In that case it should re-start the card as
MultiMediaCard using CMD0 and CMD1.
4.3
The SD Card has six registers. Refer to the tables that follow for details.
Register
Name
OCR
CSD
SCR
RCA
DSR
CID
Card Registers
Width
128
128
Bit
32
64
16
16
Card Identification information
Operation Conditions Registers
SD Memory Card’s Special
features
Driver Stage Register
Card specific information
Relative Card Address
Description
61000-05203-107, March 2008
Table 16: SD Card Registers
This register contains the card identification
information used during the Card Identification phase.
This register describes the operating voltage range
and contains the status bit in the power supply.
This register provides information on how to access
the card content. Some fields of this register are
writeable by PROGRAM_CSD(CMD27).
This register provides information on special features.
This register carries the card address is SD Card
mode.
This register provides an optional function for the
output driver condition.
Industrial Grade SD Card Datasheet
Function
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