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11
RET-3570LP User Manual
(Input impedance 50Ω; Frequency 87.5~108MHz)
15 GND G Ground Reference Ground
16 GND G Ground Reference Ground
17 GPS_RF_IN I GPS Signal input 50 Ω @1.57542GHz
18 GND G Ground Reference Ground
19 V_ANT_IN I
Active Antenna Bias
voltage
Receiving DC power supply for active antenna bias.
20 VCC_RF_OUT O Supply Antenna Bias
voltage
%585.2
±
=
VV
O
Current<30mA
21 V_RTC_3V3 I Backup voltage supply
10uACurrent
3.6V
~
2.5DC
≤
+
+
22 RESET I Reset (Active low)
8.0 ; 2.3 V VVV
ILIH
<
>
23 N.C
24 N.C
25 GPIO4 I/O General purpose I/O
VVVVVV
ILIH
855.00.3- 15.3995.1 ≤≤
≤
≤
VVVVV
OLOH
715.0 85.2375.2 ≤
≤
≤
26 GPIO0 I/O General purpose I/O
VVVVVV
ILIH
855.00.3- 15.3995.1 ≤≤
≤
≤
VVVVV
OLOH
715.0 85.2375.2 ≤
≤
≤
27 N.C
28 N.C
29 PPS O One pulse per second
VVVVV
OLOH
715.0 85.2375.2 ≤
≤
≤
30 GND G Ground Reference Ground
31 V_TMC_3V3 I DC Supply Voltage input
DC +3.3V±5%
V_GPS_3V3 (+3.3V DC power Input)
This is the DC power supply input pin for GPS system. It provides voltage for module.
GND
GND provides the ground.
BOOT
Set this pin to high for programming flash.
RXA
This is the main receiver channel. The main function is to receive software commands from
SIRFdemo software or other user’s application.
RXB
This is the auxiliary receiving channel. The main function is to input differential corrections,
then deliver them to the board for DGPS navigation.