TLC6C5816-Q1: Configuration of LED driver for diagnostics

Hi Viswanath,

Please refer to the 7.3.4.1 Configurable Outputs in the datasheet, if you want to use the diagnostic function, the output connection needs to be changed and set the corresponding DIAGx registers.

BR,

Hailee.

Hi Hailee,

Thanks for your support. Now I changed my hardware setup and initialize the DIAG0,DIAG2 Registers. By reading the ERROR pin can we get the status of LED diagnostics or How can we read the status of the LED fault diagnostics?

Regards,

Viswanath A P.

Hi Viswanath,

Yes, you can use EER pin to get the fault status and read the FAULT_READBACK register to see the specific fault.

BR,

Hailee.

In ERR pin, the fault is not detecting. I configure as per datasheet, but its not working.

Hi Hailee,

Thank you so much for your support!!

I am following below shared schematic and the ERR pin is connected to microcontroller.

The Configuration Register which I set is, {0x00,0xFF,0xFF,0xFF,0x55,0x55} (For Two IC in series).

I am using SPI communication in my project.

For Fault purpose, I short One Led and Open another Led which are connected to the diagnostic pin. After that, I read the ERR pin for getting the status.

I configure the ERR pin as INPUT pin.

Regards,

Viswanath A P.

Hi Hailee,

Now I have to read the specific fault using FAULT_READBACK register. Can u please tell how to read in SPI mode.

Regards

Viswanath A P

Hi Viswanath,

Please refer to the 7.3.9.2 Register Read and 7.5 Register Map.

The fault information loads to shift registers on the rising edge of RCK and can be read out on SER OUT. On the rising edge of the RCK signal, the MSB data DIAG14_OPEN appears on the SER OUT pin. On each falling edge of SRCK signal, there is 1 bit of data shifted out on the SER OUT pin. 

BR,

Hailee.

Hi Hailee,

I am working on it what you have suggested to do. Can you please share me if any sample code available for this in SPI read mode.

Thanks 

Viswanath AP

Hi Hailee,

In Our hardware, Led Driver is working in daisy chain method. We are configuring one IC for diagnostics purpose. But, the SDO pin is connected to second IC of  SDI and then the output(SDO PIN) is connected to Microcontroller. In this case, how we can read the fault status of Single IC?

Regards,

Viswanath AP

Hi Viswanath,

I am afraid that we don't have the sample code dedicated to this device for now.

but there is a reference design, maybe you can refer to it.TIDA-01628 reference design | TI.com

BR,

Hailee.

Hi Hailee,

I am facing reset status of CPU when I try to read the SPI.

When we read the Fault Readback Register, 1st 6 bits are CRC remainder. whether CRC remainder is required?

Thanks,

Viswanath A P.

Hi Viswanath,

Yes, this CRC reminder can help check the communication loop between MCU and device.

BR,

Hailee.