Installation Instructions
EC3-1820V2NA
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2. Power LED port (pitch: 2.54mm)
Pin
Signal Name
1
2 NC
FP2
3 GND
3. Speaker output port (pitch: 2.54mm)
Pin
Signal Name
1 BUZ-
2 NC
3 GND
FP3
4 BUZ+
2.18 SIM Port
The pin definition of SIM1 port is as follows:
Pin
Signal Name
Pin
Signal Name
1 VCC 2 RESET
3 CLK 4 GND
SIM1 (on the back
of the board)
5 VPP 6 IO
2.19 Mini-PCIe Slot
This motherboard provides two
Mini-PCIe slots,
MPCIE1 and J2 (optional) slots,
supporting WiFi wireless network port. In addition, MPCIE1 also supports 3G module,
and can realize wireless communication with SIM card slot.