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SG8 continuous reset

Question asked by Pramod Chaudhary on Oct 28, 2009
Latest reply on Oct 29, 2009 by Pramod Chaudhary


I facing a strange issue of continuous reset on my S9S08SG8 board. The SG8 seems to be resetting continously as the scope connected to reset pin shows a square wave of about 25Khz. To isolate the problem I connected only VDD and GND with a 10K pull up to RST. I can still see a 25Khz squre wave on RST.

If I pull up the BKGD/MS pin while booting, RST shows steady 5 V. P&E is unable to program the IC.

Am I missing something ?