Franco Majer

MC9S08AW internal clock trimming

Discussion created by Franco Majer on May 24, 2006
Latest reply on Feb 17, 2011 by Stipey75

Ciao to every body,

May any body knows anythings about 9S08AW USBBDM trimming?:

Try this:

CW5.0 with ProcExp.

9S08AW derivative

Internal trimm initialized

Internal oscillator

FLL engaged

Bus speed 10MHz

SCI bean:

9600 baud.

what you will find is that 9600 baud has at least 20% speed error.

This is why the USBBDM (Pemicro tool) and/or CW didn't make any trimming

--> FFBE=FF....and OSCTRIM =FF.

Do you know it?

Do you have any suggestion?

Have a good day