[net.analog] Correction to DSP56200 Tech Summary Table I

dsp@oakhill.UUCP (DSP Account) (08/08/86)

<shep siegel at datacube in 3200006@datacube writes>:

>Thanks for the post of the DSP56200. It is good to be able to read of
>new DSP chip architectures here in net.arch. I assume that the DSP56200
>is designed as a peripheral for the 56000.

>Table 1, listing the DSP56200 "performance figures" did not make any
>sense: It seems for a FIR filter application with, say, 32 taps,
>the maximum sampling frequency DECREASES as you add chips. This doesn't
>make any sense. Can anyone explain or correct?

thanks for catching this serious error in the table.  the correction is
below.

 
             TABLE I - DSP56200 Performance Figures

                            SINGLE CHIP
           --------------------------------------------
           |     Maximum Sampling Frequency (KHz)     |
           --------------------------------------------
           |                  |      Number of Taps   |
           |     Mode         |  32   64   128   256  |
           --------------------------------------------
           | FIR Filter       |  227  132   71   37   |
           | Adaptive Filter  |  123  69    37   19   |
           | Dual FIR Filters |  122  68    36   *    |
           --------------------------------------------

                            FOUR CHIPS
           --------------------------------------------
           |     Maximum Sampling Frequency (KHz)     |
           --------------------------------------------
           |                  |      Number of Taps   |
           |     Mode         |  128  256  512  1024  |
           --------------------------------------------
           | FIR Filter       |  222  132   71   37   |
           | Adaptive Filter  |  120  69    37   19   |
           --------------------------------------------

                           EIGHT CHIPS
           --------------------------------------------
           |     Maximum Sampling Frequency (KHz)     |
           --------------------------------------------
           |                  |      Number of Taps   |
           |     Mode         |  256  512  1024  2048 |
           --------------------------------------------
           | FIR Filter       |  204  132   71   37   |
           | Adaptive Filter  |  115  69    37   19   |
           --------------------------------------------

                          SIXTEEN CHIPS
           --------------------------------------------
           |     Maximum Sampling Frequency (KHz)     |
           --------------------------------------------
           |                  |      Number of Taps   |
           |     Mode         |  512  1024 2048  4096 |
           --------------------------------------------
           | FIR Filter       |  175  132   71   37   |
           | Adaptive Filter  |  105  69    37   19   |
           --------------------------------------------