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Hello !! I've following problem: I use a ATMEL T89C51CC01 Mcu with the Keil C51 c-compiler/simulator. When I use the ADC in pseudo idle mode (I set PSIDLE bit) the MCU doesn't wake up any more (although the ADEOC flag occurs !! and all other bits are set (EA,EADC,Priority highest and also tested lowest)). Until now I've tested the software only on the simulator... Has anybody an idea, what the problem might be ?? thx for your help, florian mair. P.s.: using the idle mode of the PCON sfr (IDL bit) the Mcu wakes up again ...