RoyalTek MEB-1315, Руководство пользователя

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RoyalTek Confidential
MEB-1315 User Manual
11. V_BATTERY I Backup voltage
supply
6uA(Max) Current
3.6V ~ 2.5 DC
≤
+ +
12. VIN_3V3 I DC Supply Voltage
input
DC +3.3V
±
5%
13. VDD_USB I DC Supply
for USB
DC +3.3V
±
5%
14. USB_DM I/O USB_D- Standard USB Interface
15. USB_DP I/O USB_D+ Standard USB Interface
16. N.C x x x
17. RF_VOUT O Supply Antenna 2V8@20mA
18. GND G Ground Reference Ground
19. RF_IN I GPS Signal input 50
Ω
@1,575.42GHz
20. GND G Ground Reference Ground
21. GND G Ground Reference Ground
22. GND G Ground Reference Ground
V3.3V DC power Input)
This is the DC power supply input pin for GPS system. It provides voltage to module.
GND
GND provides the reference ground.
RXA/B & TXA/B
This is as NEMA output and PMTK command input.
VDD_USB (+3.3V DC power Input)
This is the DC power supply input pin for USB.
VDD_DP & VDD_DM
This interface is automatically converted to COM port to HOST operating system.
Users can update firmware through this interface.
RF_IN
This pin receives GPS analog signal. The line on the PCB between the antenna(or
antenna connector) has to be a controlled impedance line (Microstrip at 50
Ω
).
RF_VOUT
This pin can provide maximum power 2.8V(TYP) for active antenna.
PPS
This pin provides one pulse-per-second output from the board, which is synchronized to
GPS time. This pin must pull down.