• RE: (EVAL-ADV7180-32EBZ)Please tell me the model number of XTAL.

    I've attached the crystal that was used on the evaluation board,  however you can use other crystals as long as you re-calculate the load capacitors based on the following application note


  • RE: Symbols referenced in processor 'p0' could not be resolved


    because a lot of these examples were moved from earlier releases of VisualDSP++, you may find that the way the Interrupts are handled by the LDF does not match the more recent default LDFs, such as in this case - the example just has a single block…

  • High Pass Filter problem

    Hello! I need to design IIR High Pass Filter on ADSP 21xx. My coefficients are: Numerator is 0.035; -0.175; 0.351; -0.351; 0.175; -0.035. Denominator is 1; 0.483; 0.715; 0.169; 0.068; 0.004. Can you help me debug my program? Where is a error? Thank you…
  • RE: ADV7280A-M: Test Pattern detected, but CVBS on AIN1 shows black image

    Hi Poornima,

    A brief query with regards to the required XTAL.

    The one we've purchased from RS electronics : ABM8IG-28.63636MHZ-18-D2Y-T

    According to App notes  AN-1260 - and the typical connection diagram XTAL circuit

    C1 = C2 = 22pF ,   Rdamp = 82…

  • RE: Interrupt Handling and DMA

    Hi Shafi,

    Place an SSYNC instruction after you write to DMA4_IRQ_STATUS register (before performing RTI). This would ensure that the peripheral releases the request before the RTI is executed. Another best thing is to perform a dummy PAB access before…

  • RE: 6/1/16: Noise Analysis in Precision Analog Designs

    You're right. The RTI noise and the RTO noise are equal for an op amp when you have a voltage follower (unity gain feedback). Otherwise you use the noise gain (1/beta) to translate between RTI and RTO.

  • RE: ADSP-21262, div by zero corrupts ISR?

    Ok, propably should use ISR=>IVT and the title of this thread should be something else too, but don't know how to edit that afterwards,

    Right now the problem is around the interrupt handler(s).

    What could be the official way of creating one?

  • Frequency Tolerance Specification including temperature variation of video decoder device


    I have a question of "Frequency Stability" specification of video decoder devices.
     Nominal Frequency 28.63636 MHz
     Frequency Stability ±50 ppm
    I think…

  • RE: MODE1 and #pragma interrupt

    The first of the four interrupt vector instructions should execute a "PUSH STS". This saves the value of MODE1, ASTAT[xy]. When the RTI instructions is executed to return from the interrupt this pops STS  automatically and restores MODE1 and…

  • RE: Three electrode measurement for AD5933?

    With L=50 and lower fc High Pass filter, I have mostly the same Re and Im data when calibrating:


    MCLK(khz) Frequency(khz) Calib_Real Calib_Im
    3.28 0.01 1222 -3167