Microchip Technology SAM Series User Manual

4. List of Equations
Equation 1: Crystal MFG C
LOAD
= {( [C
IN
+ C1] * [C
OUT
+ C2] ) / [C
IN
+ C1 + C2 + C
OUT
] } + oscillator PCB stray
capacitance.
Equation 2: Simplified Crystal C
LOAD
formula: C1 = C2 = ((2 * MFG C
LOAD
spec) - C
IN
- (2 * PCB capacitance)).
Equation 3:
PCB signal series termination resistor(s) value = {[(VDD-VOH(min)) / IOH(max)] - Trace Impedance}.
List of Equations
© 2022 Microchip T
echnology Inc.
and its subsidiaries
Manual
DS70005439B-page 9

Microchip Technology SAM Series Specifications

General

Brand	Microchip Technology
Model	SAM Series
Category	Microcontrollers
Language	English