Microchip Technology SAMA7G54-EK, Руководство пользователя

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7. Appendix B. Unmounted Elements
7.1 List of Unmounted Elements
Two types of unmounted components are listed in this section:
• In blue, the components that can be mounted, with some board adaptation, without any damage to the system.
• In red, unmounted components used for factory and debug configuration. Those should never be mounted, as
such action could result in damage or destruction of the board or system elements.
Figure 7-1. Unmounted Components Overview: Top View
The following table lists the top side unmounted components and their functionalities.
Table 7-1. Top Side Unmounted Elements
Ref. Type Feature
Color
Status
Used for What to do if mounted
C76 Capacitor 24 MHz Blue Crystal load capacitance
Remove R34 and R36.
C81 Capacitor 24 MHz Blue Crystal load capacitance
R37 Resistor 24 MHz Blue Crystal selection
R40 Resistor 24 MHz Blue Crystal selection
Y3 Crystal 24 MHz Blue 24 MHz crystal
R39 Resistor 24 MHz Red Crystal measurement
Only use in factory.
If mounted, the crystal
behavior will be
degraded.
SAMA7G54-EK
Appendix B. Unmounted Elements
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User Guide
DS50003273A-page 80