RoyalTek Confidential
3
RET-3570LP User Manual
15
RXB
I
Serial port B
V
V
V
V
V
IL
IH
855
.
0
0.3V
-
15
.
3
995
.
1
≤
≤
≤
≤
CMOS TTL Level
16 N.C
17 Boot
I Boot
mode
V
V
V
V
V
IL
IH
855
.
0
0.3V
-
15
.
3
995
.
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.)
