Cmos 4553 simulation Ploblem

pbutton

New Member
I have designed a circuit using a Picaxe18X to display 3 digits of data on 7-segment LEDs using the Cmos 4553 3-digit counter as the LED interface.
When simulating - the error
"DSIM model CMOS.DLL failed to authorise - Product key not found"
occurs and simulation is aborted.
 

Technical

Technical Support
Staff member
This is a bug in the CMOS.DLL file for this part.

Download the attached file, rename it from CMOS.DSN to CMOS.DLL and then place it in the /MODELS sub folder.
 

Attachments

pbutton

New Member
After much playing with the simulator I get the impression that the 4553 internal oscillator
takes up all the cpu time. Changing the external capacitor made no difference. The Picaxe program hangs on the first instruction which is "pause 1000", as it can never get to 1000!!
Single stepping gave the pause time as 0.999999 secs. I haven't tried any other cmos oscillator to see if the same thing happens.

Regards

Phil button
 
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