RoyalTek REV-2000 User Manual download pdf (Page 15)

REB-3571LP User Manual

This is the DC power supply input pin for GPS system. It provides voltage to module.

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GND

GND provides the ground .

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Boot

Set this pin to high for programming flash.

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RXA

This is the main receiver channel and is used to receive software commands to the

board from SIRFdemo software or from user written software.

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RXB

This is the auxiliary receiving channel and is used to input differential corrections to

the board to enable DGPS navigation.

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TXA

This is the main transmitting channel and is used to output navigation and

measurement data to SiRFdemo or user written software.

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TXB

For user’s application (not currently used).

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RF_ON

This pin indicates state of RF voltage.

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GPS_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 50Ω).

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V_ANT_IN

This pin is reserved as external DC power supply input for active antenna.

If using 2.85V active antenna, pin 20 has to be connected to pin 19.

If using 3.3V or 5V active antenna ,this pin has to be connected to 3.3V or 5V power

supply.

PS: The current must be ≦100mA and voltage ≦12V,if using external power supply.

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VCC_RF_OUT

This pin can provide power 30mA@2.85V for active antenna.

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Reset

This pin provides an active-low reset input to the board. It causes the board to reset

and start searching for satellites. If not utilized, it may be left open.

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PPS

This pin provides one pulse-per-second output from the board, which is synchronized

to GPS time. This is not available in Trickle Power mode.

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V_RTC_3V3 (Backup battery)

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RoyalTek REV-2000 User Manual Page 15

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