• question for ADSP-21261 power supply .

    Hi Sir ,
    We are using ADSP-21261 processor , 5V through TPS76801Q stabilized to 1.2V and supply inner-core voltage for ADSP-21261, but it turns very thermal after the chip keep working for 10 minutes . We would like to use LTC1877 to stabilize voltage…
  • ADSP-21261 TDM Codec interfacing


    I have a custom board with a ADSP-21261 DSP. SPORT01 is connected to A PCM3168 codec, which is configurated as  Master.

    24 bit, sampling frequency = 48KHz, BCLK is set to 256*48KHz, FS is generated every 1/48KHz with 50% duty.

    I want to use a 8…

  • Reading ADSP-21261 Processor with minimal components


    Is it possible to read a SHARC processor ID WITHOUT the SPI flash installed, via the ICE tool ? I developed a custom board and doing basic tests like power and processor communication,  the only components populated are X2 4.7k pull-up resistors (FOR…

  • ADSP-21261: FLG0 input in SPI master boot mode?

    Hi there,

    I am having the following problem on an ADSP-21261. My goal is to use FLG0 as input (for a dip switch), using the parallel port pins as FLGs (FLG0-15 on AD0-15). So I set PPFLGS on SYSCTL and clear FLG0O on FLAGS during init, right? So far…

  • ADSP-21261 SPI Core TX & RX slow


    I'm using the SPI as a core transfer on the 21261.

    If I just TX data then the speed of the SPI port is as expected and the data arrives ok.

    If I look to RX data then the speed of the transfer is over 12 times slower as the DSP waits for…

  • JTAG Failed 21261

    I am attempting to JTAG in to a 21261 but I receive the 0x8004 8042 error "Unable to halt processor. JTAG connection failed. You may need to exit the debugger and reset the target HW to correct this problem." I have cycled power but I still see the problem…

  • RE: Part 1: First project using a SHARC, 21261, Some Questions.

    Hi AlClark

    After a week of learning Alitum PCB layout techniques for the switching regulator im using and looking for 3D bodies to get the exact representation of geometry, this was the result. thanks! 

    Now, I feel its a bit too late, as I already…

  • 21261 sometimes swaps left and right I2S data?

    I have a 21261 project that uses SPORT1 to read the I2S data from a stereo codec and SPORT3 to write the I2S data to the codec.

    The SPORT DMAs are in use. An ISR is used to process the I2S data on a sample by sample basis.

    Normally, everything works…

  • How FFT accelerator (FFTA) on ADSP-SC58x/ADSP-2158x is different as compared to ADSP-214xx processors / What are the major features of FFTA on ADSP-SC58x/ADSP-2158x ?

    FFT Accelerator on ADSP-SC58x/ADSP-2158x is a completely new design as compared to the FFT accelerator on ADSP-214xx processors. The major differences/features of the FFT accelerator on ADSPSC58x/ADSP-2158x are:

    • Unlike in ADSP-214xx, the…
  • Porting software  from ADSP-21489 to ADSP-21573 and ADSP-SC573 

    Customer ask some questions.

    Right now we have  plenty of software for ADSP-21489, but it’s quite hard to port it to ADSP-SC573 family. Code itself

    is 99% C and C++.


    Does family ADSP-SC573 have interface with external static memory like AMI for ADSP…