From: wkt@rodos1.cs.adfa.oz.au (Warren Toomey)
Subject: DSP 4 information available
Keywords: dsp modem stuff
Organization: Australian Defence Force Academy, Canberra, Australia
Distribution: aus
Date: Mon, 20 Jul 1992 03:28:41 GMT

I've obtained some more information about the Finland DSP 4 card build
around the Motorola 56001 DSP chip, which is appended below. You can pick
up the PostScript schematics of the card via anonymous ftp from
minnie.cs.adfa.oz.au:hamradio/dsp/alefnull/dsp4schema.lzh.

The DSP4 does 9600 and 1200 in software, comes with freely-available
source for these modems and freely-available assemblers etc. 

A large cost for DSP4 will be in obtaining the 4-layer PCB. Could people who
are interested in the project let me know - we're trying to get costings
for the PCB production at the moment, and the more who want the board the
cheaper per person.

Anyway, read on for more details :-)

	Warren vk1xwt

[ Mail between me and Jarkko Vuori ]

>       + Are other people working on other software projects, such
>         as sprectrum analysers etc?

        At the moment we don't know if anybody is coding to our board. But
        we have completed
                - 1200 FSK modem
                - 9600 G3RUH modem (with adaptive equalizer)
                - limited audio spectrum analyzer (with graphical PC user
                   user interface)
                - 2400 bit/s LPC vocoder with PC user interface

                Jarkko
-----
DSP CARD 4 Technical Summary:
        E1 size (100mm * 160mm) four layer board

        Motorola DSP56001 Digital Signal Processor
                Maximum clock frequency depends DSP type and SRAM speed,
                currently 27 MHz is maximum, 33 MHz with higher speed SRAMs

        Crystal CS4215 16-bit Stereo A/D & D/A Codec
                This chip contains line-level inputs and output, mic-level
                inputs and headphones driver. Maximum sampling rate is
                48 kHz.

        32 KW (96 KB) zero wait-state RAM
                Three 35 ns 32K*8bit SRAM chips

        32 KB FLASH EPROM
                With this EPROM the card can operate independently. FLASH
		EPROM can be programmed via serial line, so there is no
                need for tedious chip changing when revising the software.

        Optoisolated synchronous/asynchronous high-speed serial line
                Maximum datarate 114 Kbit/s, interface is RS232-type
                with MAXims new high-speed level-converters MAX232A.

        General purpose I/O
                Four protected general purpose inputs and eight
                buffered (via ULN2803) outputs available.

        Switched mode power supply
                Allows wide range input voltage (7 - 24 V), high
                efficiency and easy power generation for the isolated
                serial interface.
-----
>       + Can you give a rough parts list for the DSP4? We'd like to
>         estimate PCB production costs.

OK. I appended the current list at the end of this message.

>       + The 56001 chip package you used in DSP3 is difficult to
>         obtain here in Australia - I understand we get the ceramic
>         version here. What package are you using in DSP4?

Yep. The ZL package is now discontinued by Motorola. That is one of the
reasons why we started designing DSP4. DSP4 is using the Ceramic Quad Flat
Pack (CQFP) as it is currently the cheapest one (DSP56001FE27). Another
possibility would have been PGA but the price is very prohibitive...

As Jarkko may already have been noted, the protoboards are being
manufactured and the testing will begin hopefully in next month.

BTW, it is very interesting to know what the price will be in other
countries. In Finland, we estimated it to be around 350 USD (without PCB),
but the price will go down with quantities.

Kippis,

Kaj

PARTS LIST REPORT -- dsp4.job -- Fri Jul 17 09:44:03 1992

Part Type        Reference Designation             Description
------------------------------------------------------------------------------
29F256           A7                                FLASH EPROM
74AC00           A2     A3
CS4215           A12                               16 BIT SIGMA/DELTA CODEC
DCAP,100N        C1     C12    C13    C14    C15
                 C17    C20    C21    C22    C24
                 C25    C26    C27    C28    C29
                 C31    C33    C4     C49    C5
                 C6     C7
DCAP,10N         C34    C37    C41    C43
DCAP,1U          C32
DCAP,20P         C2     C3
DCAP,2N2         C45    C47
DCAP,40P         C39    C40
DCAP,470N        C35    C36    C38    C42    C44
DCAPE,10U        C16    C23    C50
DCAPE,1U         C30    C46    C48
DCAPE,47U        C18    C19
DDIODE,1N4148    V10    V11    V12    V13    V6
                 V7     V8     V9
DDIODE,BYV1040   V3     V4                          SCHOTTKY DIODE
DIND,10U         L2     L3     L4     L5     L6     MINIATURE INDUCTOR
                 L7
DIND,4U7         L1                                 MINIATURE INDUCTOR
DNPN,2N3904      V2     V17
DRES,10K         R27    R28    R3     R35    R36
                 R37    R38    R4     R5     R7
                 R8     R39    R41    R42
DRES,12          R29    R30
DRES,220         R2     R23    R24    R25    R26
                 R6     R40
DRES,2K2         R11    R12    R13    R14    R15
                 R16    R17    R18    R19    R20
                 R21    R22
DRES,470K        R1
DRES,47K         R33    R34
DRES,600         R31    R32
DRES,68K         R10
DRES,6K8         R9
DSP56001FE27     A1                                 27 MHz DSP IN CQFP PACKAGE
DTORO,FT50-61    T1                                 SWITCHER TOROID
DXTAL,27MHZ      X1                                 CPU CRYSTAL
DXTAL,24.576MHZ  X2                                 CODEC CRYSTAL
DZENER,1N753A    V5
EU/64            J1                                 64 PIN EURO CONNECTOR
LED              V1     V16
MAX232A          A11                                HIGH-SPEED RS-232 DRIVER
MAX690           A9                                 WATCHDOG/RESET IC
MC34166          A8                                 SWITCHING POWER SUPPLY IC
MCL2730          V14    V15                         HIGH-SPEED OPTO
MCM6206          A4     A5     A6                   FAST SRAM 32KX8 25 NS
SMDCAP,100N      C10    C11    C8     C9
ULN2803          A10                                OPEN-COLLECTOR DRIVER
-----
The schematics of our new DSP CARD 4 is available at nic.funet.fi
(directory /pub/ham/dsp/packet, file dsp4schema.lzh). Comments?

Currently we are waiting for components and PCB boards to arrive, and are
expecting to begin testing at the beginning of the next month.

        Kaj Wiik                Jarkko Vuori
-----

  Warren Toomey VK1XWT, on the path to insanity
  No longer in the bowels of ADFA Comp Science.
   `Version 7 Job Control: just use ptrace(2).'
Newsgroups: aus.radio