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PGA450-Q1: Clarity with PGA450Q1EVM-S Board

Aravind .R
Genius 3175 points
Part Number: PGA450-Q1
Other Parts Discussed in Thread: PGA450Q1EVM, TIDA-00151

Dear All,

one of my customer working on PGA450Q1EVM-S, do we need TI GER USB Interface board to evaluate PGA450-Q1 part on board? please confirm.

they purchased PGA450Q1EVM-S , but there is  no USB interface board in it.

Rgds,

Aravind. 

  • 0
    TI__Mastermind 27780 points
    Aravind,

    The EVM-S is only a slave module, not a complete EVM. A separate master controller is required for the user to evaluate the EVM-S. The full-scale PGA450Q1EVM's TIGER board USB interface can be used to evaluate the EVM-S module, but is not required. Any MCU with a 5V logic level interface can be connected to the EVM-S module for UART eval. The TIGER board interface is recommended if customers want to evaluate the PGA450 using the PGA450 GUI, or upload a modified version of the PGA450 DEVRAM or OTP code.

    Since the EVM-S modules are OTP programmed, and the operation of the internal 8051 is hard-coded to execute the eight commands described in the PGA450Q1EVM-S User's Guide and TIDA-00151 UART Demo Instructional (www.ti.com/.../sldu019). A new/pristine PGA450 IC would need to be populated to the EVM-S board to enable GUI eval or OTP/DEVRAM reprogramming.
  • 0 in reply to Akeem Whitehead
    Genius 3175 points

    Thanks for your valuable feedback, customer made a test setup to mount the EVM and the sensor was placed without any external disturbances. Provided DC 9V to the EVM through 9V battery to test the Ultrasonic EVM and tried to measure the analog voltage from the pin DACO (J4-1).

    But they were not able to detect the voltage from the DAC output pin via multimeter and oscilloscope.

    I have attached the photos of our test setup that they  made to test for your reference. Kindly let us know if there are any prerequisites to be made before and the test procedure for testing the Ultrasonic EVM.

  • 0 in reply to Aravind .R
    TI__Mastermind 27780 points

    Aravind,

    The OTP program on the PGA450 of the PGA450Q1EVM-S has no test mode output enabled. Therefore, you will not be able to use the DAC output when the MICRO is enabled. There is currently no built-in OTP command or EEPROM register space dedicated to enabling the DACO output. You ultimately need to write a value of 0x01 to the Analog Test Mux (AMUX ESFR address 0xE9) test register to enable the DAC output.

    To enable the DAC output, you have three options, but any of these options will require a new PGA450-Q1 IC to be populated to the EVM-S board:

    1) Update the 8051 code to hard-code enable the DAC output during initialization.

    2) Update the EEPROM space to include 4-bits dedicated to the AMUX register.

    3) Add a command to enable direct writes to the ESFR registers (includes Analog Test Mux (ESFR 0xE9) and Digital Test Mux (ESFR 0xEA)).

    The DACO pinout on the EVM-S is a placeholder, but is not enabled by default.