Pin Assignments In Spi Mode - SanDisk SDSDB-32-201-80 - Industrial Grade Flash Memory Card Product Manual

SD Card Interface Description

3.1.2. Pin Assignments in SPI Mode

Table 3-2 lists the pin assignments and definitions in SPI Mode.
Pin #
NOTES: 1) S=power supply; I=input; O=output.
2) The 'RSV' pins are floating inputs. It is the responsibility of the host designer to connect external pullup resistors to
those lines. Otherwise non-expected high current consumption may occur due to the floating inputs.
Each card has a set of information registers (refer to Table 3-3). Detailed descriptions are provided in Section 3.5.
Name
CID
RCA 1
CSD
SCR
OCR
NOTE: 1) The RCA register is not available in SPI Mode.
The host may reset the cards by switching the power supply off and on again. The card has its own power-on
detection circuitry which puts the card into an idle state after the power-on. The card can also be reset by sending
the GO_IDLE (CMD0) command.
3-2
Table 3-2. SPI Bus Mode Pad Definition
Name Type
1 CS
2 DataIn
3 VSS1
4 VDD
5 CLK
6 VSS2
7 DataOut
8 RSV
(2)
9 RSV
(2)
Table 3-3. SD Card Registers
Width
128 Card identification number: individual card number for identification.
16 Relative card address: local system address of a card, dynamically
suggested by the card and approved by the host during initialization.
128 Card specific data: information about the card operation conditions.
64 SD Configuration Register: information about the SD Card's special
features capabilities.
32 Operation Condition Register
SanDisk Secure Digital (SD) Card Product Manual, Rev. 1.9 © 2003 SANDISK CORPORATION
1 SPI Description
I Chip Select (Active low)
I Host to Card Commands and Data
S Supply Voltage Ground
S Supply Voltage
I Clock
S Supply Voltage Ground
O Card to Host Data and Status
I Reserved
I Reserved
Description