AWR6843ISK: AWR6843ISK UART direct connection

Hi Mani,

1. You can take off the highlighted zero-ohm resistances and bring out the UART RX and TX lines from that point.

2. The voltage level for UART is 3.3V IO.

3. You can still supply power using the USB connector after disconnecting the USB to UART converter.

Regards,

Sreedeep

hi sreedeep,

 thanks for your reply.

i have few more clarification,

1. since SMD components are used ,it might be difficult to remove those resistor and make the direct connection for UART RX and TX,

can you confirm ,is there any Jumper pins or test points or connectors (these connections are brought out ),so i can directly use it ?

2. I can see from the image shared ,i see two set of com ports (standard ,enhanced ) are available on CP2105-F01-GMR

      set 1(enhanced)  RXD_ECI,TXD_ECI (pin 12,pin13) 

      set 2(standard )  RXD_SCI,TXD_SCI (pin 20,pin21)

and we also set the com ports at the applications before  running (TI mm wave visualizer app serial port screenshot attached for your reference-which is used to visualize the output point cloud data of TI outofbox demo )

a)can you confirm ,how many UARTS are there at AWR6843 device ,

b)if i have to make direct access to UART TX and RX, is it sufficient to make changes suggested by you on previous reply or do i need to do changes for any additional UART(please confirm)?

regards,

Mani 

Hi Mani,

The UART lines haven't been brought out to any test point, jumper or connector. You have to remove resistors as I mentioned earlier to bring the UART lines out. 

There is only one set of UART lines in AWR6843, and this can be connected the way I mentioned.

Regards,

Sreedeep

Hi sreedeep,

 i have additional question here.

As you suggested ,i take off the highlighted zero-ohm resistances and bring out the UART RX and TX lines and connect with my system.

and but I am not able to supply power using the USB connector (since my system is not PC).

my question:

1. in this case ,can you confirm how to provide required power supply to the AWR6843 ISK board to operated?

2. if i can supply directly from external supply, can you confirm is there any Jumper pins or test points or connectors to supply it ?

3. My requirement is to connect the UART(TX,RX) signals from AWR6843ISK EVM standalone card to my end system(i do not want to connect Via USB Cable connection to PC and board )  ,is there any converter card can be used to meet the above requirement without doing much changes, you can suggest(if your aware)?

regards,

Mani

Hi Mani,

You can solder out the pad of L9 and provide the 5V input supply. There are no test points or jumper pins to connect to for power supply. Which converter card do you require?

Regards,

Sreedeep

hi sreedeep,

thanks for your reply.

Looking for USB to UART converter (green color box in the attached screenshot)

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regards,

mani 

Hi Mani,

You can use LP-XDS110 board (LP-XDS110 Development kit | TI.com) as a USB to UART converter if it's just for testing purpose. Or you can use CP2105-F01-GMR itself externally for USB to UART conversion.

Regards,

Sreedeep 

Hi sreedeep,

 thanks for your reply. 

i have gone through USB to UART converter details shared by you.

i have attached updated interface diagram with LP-XDS110 development kit for your reference.

I have few clarification:

1.as per my understating, i need to provide external power supply to run LP-XDS110 development kit  as shown in above diagram,

     a.is my understanding correct? 

     b. does LP-XDS110 development kit get any internal power supply via USB C type connector also to run?

2. Can you confirm, the connector type (female/male) of USB C type on LP-XDS110 development kit?

3. Can you confirm, the required power supply to run the AWR6843ISK EVM is supplied from LP-XDS110 development kit via USB C type Connector or not?

4.please confirm, the attached interface diagram with LP-XDS110 development kit will work without issue or do i need to do any additional thinks?

regards,

Mani