5.8 How to connect the SD CARD interface
The NXP i.MX6UL Ultra Secured Digital Host Controller (uSDHC) provides the interface between the host system
and MMC/SD/SDIO/CE-ATA cards, including cards with reduced size or mini cards. The module include this features and in the figure is
shown how the Micro SD Card connector is connected to GEA Module in the evaluation board. The uSDHC signal of the module's main
connector are listed in table below.
Figure 14
Number
Name
Primary Function
Description
GPIO
Capable
Voltage
183
SD1_CD
uSDHC1 CD Signal
Y
+3,3V
188
SD1_DAT0
uSDHC1 DAT 0 signal
Y
+3,3V
187
SD1_DAT1
uSDHC1 DAT 1 signal
Y
+3,3V
185
SD1_DAT2
uSDHC1 DAT 2 signal
Y
+3,3V
186
SD1_DAT3
uSDHC1 DAT 3 signal
Y
+3,3V
189
SD1_CLK
uSDHC1 CLK signal
Y
+3,3V
190
SD1_CMD
uSDHC1 CMD signal
Y
+3,3V
Table 17
D N :
3 3
