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PGA460PSM-EVM: SPI interface question

Paul Yeh
Genius 15275 points
Part Number: PGA460PSM-EVM
Other Parts Discussed in Thread: PGA460, PGA460-Q1

Hi team,

My customer would like to use SPI interface to communicate PGA460PSM-EVM but they have some questions.

1.  Could they use SPI interface on  PGA460PSM-EVM  ?  And If they could use SPI, do they need to link TXD/RXD/SCLK/PWR/GND ?

2. They need to use 4pcs Ultrasound on their application, so could they commode use one SPI bus for 4pcs ultrasound module?

Thanks

  • 0
    TI__Mastermind 27950 points

    Hi Paul,

    Yes, the customer can use SPI to interface with the PGA460PSM-EVM.

    All five pins you have indicated will be used for SPI communication:

    • TXD = SPI MISO
    • RXD = SPI MOSI
    • SCLK = SPI CLK
    • VPWR = 6-28V supply
    • GND = ground

    Note: there is no chip select on the PGA460.

    It is possible to connect up to eight PGA460 on the same SPI bus.

    Note: the UART_ADDR register value of each PGA460 must be EEPROM programmed to different values prior to bus installation.

    See the following PGA460 FAQs for more details on bus interface support:

    http://www.ti.com/lit/an/slaa733/slaa733.pdf?ts=1588692817282:

    • 2.4 How can I prepare for mass production programming and system integration?
    • 5.5 Can I evaluate multiple PGA460 devices using the same UART (or SPI) bus of the PGA460-Q1 EVM?
    • 4.4.11 Is daisy-chain supported by the PGA460? Can the master controller automatically differentiate and program the PGA460 UART address?

    Note: Wherever UART is mentioned, this is also applies to SPI.

  • 0 in reply to Akeem Whitehead
    TI__Genius 15275 points

    Akeen,

    Thanks for your feedback and customer asked the other related question. Please help.

    We want double confirm our design block diagram as below 

    1.Does Option 1 and Option 2 design is OK ?

     

    2.For Ultrasound module, Does it have any design rule document about structure design for our reference ? 

     

    3.For Ultrasound PGA460Q1EVM module. 

       (1) Could we request change this connector to other type on EVM ? ( As below picture "Green circle" area.)

        (2) Could we request added hole on EVM for fix Ultrasound module on our structure ?  ( As below picture "Blue circle" area.)

    Thanks

  • 0 in reply to Paul Yeh
    TI__Mastermind 27950 points

    Hi Paul,

    1. Yes, both interface options drawn are correctly, and will support a SPI/USART bus. There is also the option to use a UART bus, which removes the SCLK pin.

    2. This question is not clear.

    3. To make a connector change and add a mounting hole to the PGA460PSM-EVM hardware, download the Altium CAD Design Files ( TIDA-060024 CAD Files ) from the http://www.ti.com/tool/TIDA-060024 page. The customer can then make all modifications in Altium.