Product manual

SanDisk miniSD Card Product Manual, Rev. 1.0 © 2003 SANDISK CORPORATION 3-1
3. miniSD Card Interface Description
3.1. General Description of Pins and Registers
The miniSD Card has 11 exposed contacts on one side. The host is connected to the miniSD Card using a dedicated
9-pin connector.
3.1.1. Pin Assignments in mini SD Mode
Figure 3-1 lists the pin assignments and definitions in SD bus / SPI Mode.
Figure 3-1. Contact Area
SD Mode
SPI Mode
Pin #
Name Type
1
Description Name Type Description
1 CD/DAT3
2
I/O/PP
3
Card Detect / Data Line
[Bit 3]
CS I Chip Select (neg true)
2
CMD PP Command/Response DI I Data In
3
V
SS1
S Supply voltage ground V
SS
S Supply voltage ground
4
V
DD
S Supply voltage V
DD
S Supply voltage
5
CLK I Clock SCLK I Clock
6
V
SS2
S Supply voltage ground V
SS2
S Supply voltage ground
7
DAT0 I/O/PP Data Line [Bit 0] DO O/PP Data Out
8
DAT1 I/O/PP Data Line [Bit 1] RSV
9
DAT2 I/O/PP Data Line [Bit 2] RSV
10 NC
4
I/O/PP For Future Use NC For Future Use
11 NC
4
I/O/PP For Future Use NC For Future Use
Table 3-1. miniSD Memory Card Pad Assignment
1) S: power supply; I: input; O: output using push-pull drivers; PP: I/O using push-pull drivers ;
2) The extended DAT lines (DAT1-DAT3) are input on power up. They start to operate as DAT lines
after SET_BUS_WIDTH command. The Host shall keep its own DAT1-DAT3 lines in input mode,