• 07/14/2017
  • Public Content
Contents

SD Card Subsystem

The expansion board contains a micro SD card slot at J5 attached to the bottom side. See Expansion Board Interfaces for the location of the SD card slot.
The SD card interface is sourced from the Intel Joule module and routed to an NXP IP4856CX25 level shifter. The level shifter allows for the support of both 1.8 volt and 2.9 volt cards. The output of the level shifter is routed directly to the micro SD card connector.
The micro SD card connector power is sourced from the +3.3 volt buck/boost regulator.
Refer to the micro SD card specifications for electrical and power requirements. Refer to the NXP IP4856CX25 datasheet for the SD card interface signal specifications. The power from the level shifter can support a maximum current of 100 mA and has a supply voltage of 2.9 V.
Micro SD Card Connector Pinout
Pin #
Net Name
Direction
Signal Description
1
SDCARD_D2_CONN
Bidirectional
Data lane 2
2
SDCARD_D3_CONN
Bidirectional
Data lane 3
3
SDCARD_CMD_CONN
Bidirectional
 
4
+V3P3V_MICROSD
Output
+2.9 volt supply to SD card
5
SDCARD_CLK_CONN
Output
 
6
GND
Ground
Ground
7
SDCARD_D0_CONN
Bidirectional
Data lane 0
8
SDCARD_D1_CONN
Bidirectional
Data lane 1
 

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804