User's Guide

QA-FR-175-A
Pin Number
Description
Pin Number
Description
1
3V3
2
5V
3
I2C_SDA
4
5V
5
I2C_SCL
6
GND
7
SPI_CS_L
8
TXD0
9
GND
10
RXD0
11
RESET_L
12
FAN_CTRL
13
PWR_DWN_L
14
GND
15
DRV_INT_L
16
SOP2
17
3V3
18
EN_3V
19
RADAR_NRST
20
GND
21
RXD4
22
RADAR_GPIO_0
23
NC
24
NC
25
NC
26
SPI_CLK
27
NC
28
NC
29
SPI_MISO
30
NC
31
SPI_MOSI
32
NC
Table 2: J2 32-pin Connector Pinout
2.3. Onboard Antenna
The UNI42 Radar module has built-in microstrip patch antennas for both transmitters and
receivers. The antennas are connected directly to the Radar transceiver chip via microstrip
transmission lines, and the connections are permanent. Per FCC regulation, the end user is
prohibited from modifying any part of the antennas and the feed traces.
3. System Integration Considerations
3.1. Hardware
Brief/general discussion on how end user could integrate this module with a host system, from HW
perspective.
3.2. Software
The module is configured by the host through commands sent over the UART port. Please consult
with the module manufacturer for details.
3.3. Test Modes
When the UNI42 Radar module is installed in a host, the host manufacturer may need to disable the
module in order to perform certain tests such as FCC Part 15 Subpart B.
In order to disable the transmitter, the following command should be issued to the module over the
UART port:
sensorStop
To return the transmitter to its normal operating state, the following command should be issued to
the module over the UART port:
sensorStart