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TPS929240-Q1: Design questions

Sam Sun
Intellectual 875 points
Part Number: TPS929240-Q1


Tool/software:

1. The hardware interface has 3 ADDRs. Can a maximum of 8 ICs (000-111) be mounted simultaneously.
2. What key registers need to be configured for initialization of a single chip, and what is the corresponding data length in approximately bytes.
3. How many bytes of data can be sent per packet when all channels of a single chip are used.
After sending a packet of data, the chip lights up the corresponding LED. If there is no new signal data, will the LED maintain its final state or perform other actions.
5. Assuming a UART baud rate of 1M for transmitting 10 bytes, the required time is approximately 8 * 10/1000000=0.00008s. Can this be calculated?

  • 0
    TI__Genius 10320 points

    Hi Sam,

    1. Yes, you can.

    2. there is a sample code, you can refer to its initialization and corresponding data.

    3. Please refer to 6.5.1 FlexWire Protocol of datasheet. if you use burst mode, the DATA_N length can be up to 24 bytes, which is shown in the Table 6-12, you can send 28 bytes to update 24 channels.

    Or you can change the DATA length according to your requirement.

    4. It will keep the final state until the next command, but in the case of communication loss, the device will run into fail-safe mode.

    5. Please add the start bit and stop bit in your calculation. 10*10/1000 000 = 100us.