S&T Kontron pITX-iMX8M, User Manual

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pITX-iMX8M – User Guide Rev. 1.4
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6.3. MicroSD and MicroSIM (J12)
The pITX-iMX8M board supports micro SD cards via micro SD/micro SIM combo connector.
The micro SD card interface supports the following transfer modes:
 SD 1-bit
 SD 4-bit
 SD/SDIO full speed mode up to 25 MHz
 SD/SDIO high speed mode up to 50 MHz
 SD/SDIO UHS-I mode up to 208 MHz in SDR mode and up to 50 MHz in DDR mode.
Micro SD Card write protection switchable via SW2: 1-4
Figure 11: Combo Connector for MicroSD and MicroSIM
Table 11: Pin Assignment MicroSIM Combo Socket
Pin Function Direction Description
S1 V_UIM_PWR Power
S2 UIM_RST Out
S3 UIM_CLK Out
S4 NC
S5 GND Ground
S6 NC
S7 UIM_DATA In/Out
S8 NC
T1 SDIO_DAT2 In/Out
T2 SDIO_DAT3 In/Out
T3 SDIO_CMD In/Out
T4
V_3V3_SD Power +3.3V
T5 SDIO_CLK In/Out
T6 GND Ground
T7 SDIO_DAT0 In/Out