Hello,
The cpu runs correctly with 16MHz internal RC , and runs correctly with an 8Mhz QUARTZ,
But when connecting an External oscillator 8MHZ MASTERCRISTAL MCS01Y-B-8MHZ level 1,2V , square wave
=> the cpu doesnt start correctly because it detects
S_FXOSC =0 (0 fast external crystal oscillator (4-16 MHz) is not stable)
the oscillator is MASTERCRISTAL MCS01Y-B-8MHZ level is 1,2V , square wave is clean , stable and accurate 8MHZ
The trace of EXTAL is short (3.5mm) , the XTAL is left unconnected (we try too with EXTAL grounded )
With 3 différents boards , the problem is the same
Seems to be a soft initialization problem
Can any body help us ?
Thanks for all
Pierre CAZENAVE
