RT809F HELP ?

wim

Early product of this chip can be programmed easily.Many kinds of firmware are provided completely by local vendor.We may write it correctly in off line
mode. But I don't know the service code.  Later released board is not similar to earlier board in shape.Its' shape is rectangular.I can't write its' program
by RT809F.I have to burn it externally.But I can use service code easily.The code is Menu>1'1'4'7.I found many sub menu to adjust. Menu button does
exit function.I found the original designer of this chip in service menu.That is Germany. So this chip is not a fake. Thank.