RoyalTek RDR-3100 User Manual page 10

15 RXD2 (SiRF 3 I Can bus data (Receive)
RXD2) Car PC (UAR2)
16 GND G Ground
17 GND G Ground
18 GND G Ground
19 N.C NC
20 N.C NC
GPS_5V
This is the DC power supply input pin for system. .
GND
GND provides the reference 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.
RXD2
This is the auxiliary receiving channel communicated with car pc with can bus
TXD1
This is the main transmitting channel and is used to output navigation and measurement data to SiRFdemo or user written software.
TXD2
This is the auxiliary transmitting channel communicated with car pc with can bus
ODOMETER
This pin provides for connecting to odometer.
RTC (Backup voltage)
RDR-3100 User Manual
Vih > 2V Vil<0.8V
Reference Ground
Reference Ground
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