RFD900ux Data Sheet
www.rfdesign.com.au
9
Last update 12/09/2019
6
Pin signals and layout
Figure 5-1: Physical pin layout of the RFD900ux Radio Modem
Pin #
Name
Direction
Description
Max Voltage
1
VUSB
Input
Power supply from USB
5V
2
USB_DM
USB Data -
3
USB_DP
USB Data +
4
SWO_EXT
Output
SWD debug output
3.3V
5
P3.3_EXT
I/O
Digital I/O
3.3V
6
P3.4_EXT
I/O
Digital I/O
3.3V
7
P3.5_EXT
I/O
Digital I/O
3.3V
8
GND
-
Ground
0V
9
GND
-
Ground
0V
10
+3V3
LDO output
3.3V
11
GND
-
Ground
0V
12
GND
-
Ground
0V
13
ANT1
-
Antenna 1
-
14
GND
-
Ground
0V
15
GND
-
Ground
0V
16
ANT2
-
Antenna 2
-
17
GND
-
Ground
0V
18
GND
-
Ground
0V
19
+5V
Power Supply
5V
20
GND
-
Ground
0V
21
P1.0_EXT
I/O
Digital I/O
3.3V
22
P1.1_EXT
I/O
Digital I/O, PPM I/O
3.3V
23
P1.2_EXT
I/O
Digital I/O
3.3V
24
P1.3_EXT
I/O
Digital I/O
3.3V
