Hello everyone, i made demonstartion board for 908QT4 as per AN2305 fig1. Also programmer as described in Datasheet Fig15-10 - page 140. This is monitor mode circuit with external oscilator and high voltage.
I use P&E Micro to program usermitor program from AN2305, then i program the M68DemoQTQY software. No errors during programing.
Then i take chip from programmer and put into demonstration board, Demo program works fine (led Blinks and so on) but when i close Sw1 to enter usermonitor i cant get to comunicate with P&E soft.
I swapped MAX232 chip from programmer to demo board same error, In comunication dialog box of P&E i get 1) Hardware loopback detected : Yes . All rest items are NO.
Anyone have an idea or can point me in the right direction ??