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3
RET-3570LP User Manual
15 RXB I Serial port B
VVVVV
ILIH
855.00.3V- 15.3995.1 ≤≤
≤
≤
CMOS TTL Level
16 N.C
17 Boot I Boot mode
VVVVV
ILIH
855.00.3V- 15.3995.1 ≤≤
≤
≤
18 GND G Ground
19 N.C
20 N.C
Switch U4
Pin # Signal Name 0/1 Description Characteristics
1 GPIO-0 GPIO input/output Switch:
0: Low 1:High CMOS TTL Level
2 GPIO-4 GPIO input/output Switch:
0: Low 1:High CMOS TTL Level
3 GPIO-15
(N.C for
RET-3570)
GPIO input/output
(N.C for RET-3570)
Switch:
0: Low 1:High CMOS TTL Level
(N.C for RET-3570)
4 PPS PPS output Switch:
0: Low 1:PPS output
5 GPS_3V3 Power supply for
GPS section
Switch:
0: Low 1: DC 3.3V output
6 TMC_3V3 Power supply for
TMC section
Switch:
0: Low 1: DC 3.3V output
7 N.C
8 RF_Bias RF_Bias voltage
switch
0: open. No voltage provide antenna.
1:Provide 2.85V to antenna.
Connector:
Pin # Description Characteristics
J1 GPS RF Connector 1575.42MHz
J5 FM RF Connector 87.5MHz~108MHz
J4 Stereo Jack
Audio output
(Right and Left channel)
RoyalTek Evaluation Kit REV-2000 for RET-3570 LP
(Please refer to RoyalTek Evaluation Kit REV-2000 for RET-3570 Operational Manual for more
information.)