Figure 2-25. Switch Configuration for DCA1000 Mode (mmWave Studio)
2.10 PC Connection
2.10.1 Installing the Drivers
The SICP2105 drivers must be installed to access the UART port. Download and install the drivers
When installed correctly, the COM port should be enumerated as shown in .
Figure 2-26. SICP2015 COM Ports
The enhanced COM port is the application/user UART and the standard COM port is the data port.
2.10.2 Flashing the Board
1. Ensure the drivers have been successfully installed and COM ports enumerated.
2. Configure the SOP to flashing mode.
3. Run the UniFlash tool.
4. Press the reset switch to ensure that the board boots up in the right mode.
5. Enter the Enhanced COM Port in UniFlash interface.
6. Load image to serial flash.
2.11 Power Supply Optimization
For best transient supply settling at the start of the chirp, the [idle time + TX start time] can be set to a value <
10 µsec. In this configuration, the firmware keeps some of the RF blocks ON between the chirps. For idle time +
Tx start time > 10 µsec, the blocks are turned off for power saving. In cases where all transmitters and receivers
are enabled and the idle time is > 10us, the transient caused by the dynamic power save disabling and enabling
the blocks can produce a ringing behavior on the output of the secondary LC filter. If this ringing is impacting
the RX sampled data, the ADC start time can be increased to a point where the supply is settled within 5%, or
the inductance value can be reduced to reduce the ringing (which may come at the expense or poorer 4-Mhz
filtering). Typically, setting issues will show up as a transient in the start of the time domain plot as shown below.
Hardware
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AWR1843AoP EVM User’s Guide
SPRUIX8 – MARCH 2021
Copyright © 2021 Texas Instruments Incorporated