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Another Simple Programer for the SI-570

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  • dick_faust
    Just got a NXP [Phillips] SC18IM700 Demo Board P/N OM6272 [Digi-Key # 568-3512-ND $27.38]. This is a complete RS232 to I2C controller with some extra I/O and
    Message 1 of 1 , Dec 3, 2007
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      Just got a NXP [Phillips] SC18IM700 Demo Board P/N OM6272 [Digi-Key #
      568-3512-ND $27.38]. This is a complete RS232 to I2C controller with
      some extra I/O and static RAM parts. I think it would be possible to
      program the static RAM with SI570 frequency data and then use the
      controller to transfer the data to the SI570. NPX has free demo
      software sc18im700.gui.zip that will control the demo or read & write
      directly to the I2C bus and the SI-750. Also get datasheet and App
      Note AN10397 for more information. It is also possible to use any
      terminal program software to write hex to the serial port [probably
      will need to be scripted like a hex file and sent as a file
      transfer]. The SI18IM700 chips are $2.38 ea at DigiKey [568-321-5-ND
      16-TSSOP].

      http://www.nxp.com/#/pip/pip=%5bpip=SC18IM700_2]|pp=
      [v=d,t=pip,i=SC18IM700_2,fi=51854,ps=1]|[6]

      {be careful of the link it split into two lines}

      When I get some time I will try to generate and post a simple GW-
      Basic program that will read and write the file format for the SI-570
      using the SC18IM700 commands with the info from the SI57x Demo
      Software.

      The Silicon Labs SI57x demo software has a Excel Spreadsheet plus a
      SI57x programer that will give you the hex values and detailed
      instructions for reading and writing to program the SI570 for a new
      frequency.

      If you take the Oscilator part # info generated at Silicon labs and
      insert it in the programer software it gives you the following:
      RFREQ: 43.36667104
      HS_DIV: 11
      N1: 8
      Calculated fxtal: 114.285000 [nominal - should read actual from osc]

      [SI PN info: Start Freq(MHz) 56.320000 & I2C Address - 55hex 85dec]

      Silicon Labs also has a neat development system called a Toolstick
      Starter Kit [Mouser 634-TOOLSTICKSK $24.99] that includes a C8051F330
      that should run the recompiled AN334 software. The chip is also
      available in a 20pin dip as C8051F330-GP [Mouser 634-C8051F330-GP
      $4.29]. I plan to evaluate this as well, but it will not be as
      simple as the NXP chip.

      73,
      Dick Faust K9IVB
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