28 dip vs 20 ac/ss

Jack C

The program is an RC Reveiver with the sx20ss as the decoder.
The program runs fine on the sx28 AC/DP.· It won't run on the
ss 20.· So I wrote a simple toggle for RB pins as output.· I have
tried 4 new chips and the first 5 pins toggle fine but the last
3 stay low.· All four ss 20's give the same result.· On the 28 dip they all work.· I have read the code back and ran verify with
O.K.·· I thought I might have ruined the ouput pins rb with solder
heat but the last one I didn't solder the rb pins and they still give
the same result.· Clock is internal 4MHZ, the DEVICE line:
DEVICE SX28, TURBO,STACKX_OPTIONX,OSC4MHZ
I use SXKEY v3.1 and SXWIZ Basic.· The date code is:
SX20 AC/ss AB0021AM
Could there be a SXkey 3.1 problem with a difference between
the two chips ?
Any help here would be much appreciated
Elektron

Nate

Try using SX20 in the DEVICE line.

LoopyByteloose

Great work Nate. I read this and missed that DEVICE SX28

details...
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what a simple 'gotcha'

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"When all think alike, no one is thinking very much.' - Walter Lippmann (1889-1974)

······································································ Warm regards,····· G. Herzog [noparse][[/noparse]·黃鶴 ]·in Taiwan

Jack C

Thanks Nate. After I made the post, I read the manual (always a last resort for me). Anyway, it states to use
the SX 18 in the device line for the SX20. Why was there never an SX20 ? Anyway it works fine now. Thanks
for the response. The SX20 would have worked also as it says it defaults to SX-18.
Jack C