Hello Vincent

1) See STR9x JTAG Boundary Scan Error using RlinkPro => Previous Post for symptoms
2) My application now requires a 4MHz Osc to run both the STR9X and an external A/D Converter (STR9X doesn't have enough bandwidth to close loops on when A/D is running with 8 MHz Osc.)
3) when I switched from an 8 MHz to a 4 MHz Osc the above RLink Pro problem returned!
4) I'm still using your patch that works at 8 MHz.
5) I'm running at the lowest Rlink Pro Clock rate of 400KHz.
6) I have tried to increase the Rlink Pro Clock rate, but of course the problem only gets worse.

Need help fast, I'm stuck!

Thanks,
mschott