RoyalTek REB-1722 Series, Руководство по эксплуатации

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RoyalTek Confidential
13
REB-1722 Operational Manual
V V V V V
IL IH
86 . 0 0.3V - 0 . 2 15 . 3
≤ ≤ ≥ ≥
28 TIMEMARK O
One pulse per
second
V V V V V
IL IH
86 . 0 0.3V - 0 . 2 15 . 3
≤ ≤ ≥ ≥
VCC_3V3 (DC 3.0~3.6V Power Input)
This is the DC power supply input pin for GPS system. It provides voltage to module.
GND
GND provides the ground.
Boot
Set this pin to high for programming flash.
RXD1
This is the main receiver channel and is used to receive software commands to the board
from SIRFdemo software or from user written software.
TXD1
This is the main transmitting channel and is used to output navigation and measurement
data to SiRFdemo or user written software.
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 50
Ω
).
V_ANT_IN
This pin is reserved as external DC power supply input for active antenna.
1. If using external supply DC+3.3V~5V to Active antenna
2. If using connects to VCC_RF pin supply to Active antenna, pin 18 has to be
connected to pin 19
PS: The current must be
≦
100mA and voltage
≦
5.5V, if using external power supply.
VCC_RF_OUT
This pin can provide power 20mA@DC+2.85V for active antenna.