Saulius Jacenas


Discussion created by Saulius Jacenas on Oct 8, 2007
Latest reply on Oct 12, 2007 by Alban Rampon

I am using this demo board to program my QD4 mircos on my application boards. Up till now I was using in-system-programming cable connected and and it was just fine. I programmed a rs232 type communications using timer and it works very well. But today I noticed that when I disconect programmer (DEMO9S08QD4) switch power off then on, communications get lost. It seems that internal oscilator trim value is wrong. Now when I programme micros with debugger connected through BKGD trim value seems to be ok. In the True-Time Simulator & Real-Time Debugger, at MultilinkCyclonePro->Advanced Programming/Debug Options there are trim options with only one check box: "Calculate Trim and Program the Non-Volatile Trim Register". I keep it checked. I thought that means that it automaticly writes trim value to flash and I don't have to worry about it. So do I have to write it myself?