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
cards, including cards with reduced size or mini cards. The module includes these features and the figure shows how the Micro SD Card
connector is connected to MicroGEA Module in the evaluation board. The uSDHC signal of the module's main connector are listed in the
table below.
Figure 16
B Connector
Name
Primary Function Description
CPU Pin Name
GPIO Capable
Voltage
73
SDIO_DET
uSDHC CD Signal
UART1_RTS
Y
+3,3V
84
SD1_DAT0
uSDHC DAT 0 signal
SD1_DATA0
Y
+3,3V
80
SD1_DAT1
uSDHC DAT 1 signal
SD1_DATA1
Y
+3,3V
82
SD1_DAT2
uSDHC DAT 2 signal
SD1_DATA2
Y
+3,3V
78
SD1_DAT3
uSDHC DAT 3 signal
SD1_DATA3
Y
+3,3V
86
SD1_CLK
uSDHC CLK signal
SD1_CLK
Y
+3,3V
88
SD1_CMD
uSDHC CMD signal
SD1_CMD
Y
+3,3V
Table 14
D N :
3 4
