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12
GE2015
Dev Board User Guide
2.3.
F
UNCTION
I
NTRODUCTION
No.
Annotation (bit number)
Description
1
USB interface (X3)
Output the signals USB_DM, USB_DP of J8 module interface, and USB interface connects to +5V voltage input.
2
Power adapter input interface (X4)
Output interface of 5V power adapter.
3
Power switch (S4)
The user can choose the power mode this switch. Left side is for USB or power adapter power-up, right side is for DC
power supply.
4
Power input interface (SB1
、
SB2)
The power input of Dev Board is DC power supply, and the recommended voltage is 3.8V
5
SPI to RS232 interface (X12)
SPI can convert to UART via chip XR20M1170, and then convert to RS232 via MAX3238.
6
UART2 to RS232 interface (X25)
UART 2, Communication port (for debug log output information), 2-wire serial, can connect to RS232 interface.
7
UART2 to USB interface (X8)
UART 2, Communication port (for debug log output information), 2-wire serial, can connect to USB interface.
8
UART1 to RS23 (X24)
UART 1, Communication port (for AT command interaction), 8-wire UART, can connect to RS232 interface
9
UART1 to USB interface (X9)
UART 1, Communication port (for AT command interaction), 8-wire UART, can connect to USB interface
10
ON/OFF button (S2)
This button is connected to the PWR_ON signal of S2 module interface, the PWR_ON signal is set to low and the
module will start up.
Note:
1. When the interface board is GE2015_SB_B, connect to jumper TP15 can set POWER_ON as always low to power
on module once connect to the mother board to power supply.
2. When the interface board is GE2015_SB_ME3630PCIE, no matter TP15 is connect or not, the module will power
on once connect to power supply
11
RESET button (S3)
This button is connected to the PWR_RST signal module interface, the PWR_RST signal is set to low when press this
button. When press this button and then release it, the module will be reset
12
3.3V level domain UART1 8-wire
interface (X7)
Reserved, extended UART1 interface after 3.3V lever switch, 8-wires.
13
Audio PCM interface (X1)
Audio PCM port, I2C interface, 3.3V level and VCCIO level.
14
SDIO interface (X5)
1.8V SDIO interface
