ConnectCore 6UL SBC Pro interfaces
Storage interfaces
ConnectCore 6UL SBC Pro Hardware Reference Manual
33
Storage interfaces
microSD
A microSD connector is located on the bottom side of the SBC. This interface is connected to the
USDHC2 controller of the i.MX6UL CPU.
The following table shows the pinout of the microSD socket:
Pin Signal name Description
1
CSI_DATA04
Serial data 2
2
CSI_DATA05
Serial data 3
3
SD_CMD
Command line - output of the analog switch (U33) for CSI0_HSYNC signal
4
3V3
3.3V power line
5
SD_CLK
Serial clock - output of the analog switch (U34) for CSI0_VSYNC signal
6
GND
Ground
7
CSI_DATA02
Serial data 0
8
CSI_DATA03
Serial data 1
9
GND
Ground
10
GND
Ground
eMMC
The ConnectCore 6UL SBC Pro carries a 4 GBytes eMMC memory. This interface is connected to the
USDHC2 controller of the i.MX6UL CPU.
Pad conflicts
The eMMC shares the connection to the i.MX6UL processor with the microSD interface. The selection is
made via the eMMC/SD# signal, which is driven by the i.MX6UL processor, so the devices cannot be used
simultaneously.
The eMMC/SD# signal is connected to the GPIO5_01 port of the i.MX6UL. The following table describes
its behavior:
eMMC/SD# level Description
Low
microSD connected
High
eMMC connected
The eMMC memory can be switched off for advanced power management through I/O expander
eMMC_PWR/IO8 signal.
