AN2555 - Application note

Modified features

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1.9.1

Hardware impacts

Port 0 configuration might be changed with regards to the new PLL factor.

The components on XTAL1 & XTAL2 (crystal and capacitors, or resonator) must be changed for the

following reasons:

●

the input frequency range is now 4 to 12 MHz

●

it is no longer possible to use a crystal or a ceramic resonator in direct drive mode

●

it is no longer possible to use a PLL factor with a frequency generator

●

the electrical characteristics of the main oscillator have changed (transconductance)

1.9.2

Software impact

None.