Interface, 1 connector type：20 pin header，2.0 mm pitch (j2), Gps_5v – RoyalTek PANASONIC GYRO RDR-3200 User Manual
Page 8: Boot, Rdr-3200 user manual
RDR-3200 User Manual
5. Interface
5.1 Connector Type：20 Pin Header，2.0 mm pitch (J2)
Pin
NO
Signal Name
I/O
Description
Characteristics
1 N.C
None
connector
2
GPS 5V
I
+5V DC Power Input
DC +5V ± 5%.
3 RTC
(Backup
voltage)
I
User Supply DC +2.6 ~
+3.6V
DC +2.6 ~ +3.6V.
Current
≤ 10uA w/o battery
4
GPS 5V
I
+5V DC Power Input
5
Reset
I
Reset (Active low)
8
.
0
2.3V
V
V
V
<
>
IH
IL
6 Boot
I
Boot
mode
V
V
V
V
IL
IH
855
.
0
0.3V
-
995
.
1
15
.
3
≤
≤
≥
≥
7
Back (Reverse) I
Forward or Back
Forward (Hi level :>2V)
Backward (Lo level: <0.8V)
8 N.C
None
connector
9
Odometer
I
Odometer
Input frequency<4k HZ
Vih > 2V Vil<0.8V
10 GND
G
Ground
Reference
Ground
11 TXD1 (SiRF 3
TXD1)
O
NMEA (transmit) Car PC
(UAR1)
2
4800bps, 8 data bits, no
parity, 1 stop bit
V
V
V
V
V
OL
OH
715
.
0
375
.
2
85
.
≤
≥
≥
12 RXD1 (SiRF 3
RXD1)
I
NMEA (Receive) Car PC
(UAR1)
3
V
V
V
V
V
IL
IH
855
.
0
0.3V
-
995
.
1
15
.
≤
≤
≥
≥
13 GND
G
Ground
Reference
Ground
14 TXD2 (SiRF 3
TXD2)
O
Can bus data (transmit)
Vih > VDD-0.1V Vil<0.6V
Car PC (UAR2)
VDD:3.3V for MCU
15 RXD2 (SiRF 3
RXD2)
I
Can bus data (Receive)
Vih > 2V Vil<0.8V
Car PC (UAR2)
16 GND
G
Ground
Reference
Ground
17 GND
G
Ground
18 GND
G
Ground
Reference
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.
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