
mITX-BW – User Guide, Rev. 1.6
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7.20.
Micro SD Card Connector (J45)
Figure 37: Micro SD Card Connector on rear side of board (selection)
Table 47: Pin Assignment J45
Pin
Signal
Description
Type
1
SD3_D2
Data bit 2
IO 3.3/1.8
2
SD3_D3
Card Detect / Data bit 3
IO 3.3/1.8
3
SD3_CMD
Command line
IO 3.3/1.8
4
VDD
Power +3V3
PWR
5
SD3_CLK
Clock
0 - 1.8/3.3
6
GND
Ground
PWR
7
SD3_D0
Data bit 0
IO 3.3/1.8
8
SD3_D1
Data bit 1
IO 3.3/1.8
7.21.
SIM Card connector (J31)
Figure 38: SIM Card connector on rear side of board (selection)
Table 48: Pin Assignment J31
Pin
Signal
Description
Type
1
V_UIM_PWR
Power +5V or 3V3
PWR
2
UIM_RESET
Reset signal
3
UIM_CLK
Clock signal
CLK
4
UIM_IC_DP
AUX1 (Optional)
5
GND
Ground
PWR
6
UIM_VPP
Programing voltage input (optional)
7
UIM_DATA
Input or Output for serial data
8
UIM_IC_DM
AUX2 (Optional)