Microchip Technology SAMA7G54-EK, User Manual

Page: 81 / 90

...........continued
Ref. Type Feature
Color
Status
Used for What to do if mounted
C165 Capacitor
25 MHz
RGMII
Blue Crystal load capacitance
Remove R171.
C166 Capacitor
25 MHz
RGMII
Blue Crystal load capacitance
R167 Resistor
25 MHz
RGMII
Blue Crystal selection
R168 Resistor
25 MHz
RGMII
Blue Crystal selection
Y5 Crystal
25 MHz
RGMII
Blue 25 MHz crystal
C192 Capacitor 25 MHz RMII Blue Crystal load capacitance
Remove R178.
C193 Capacitor 25 MHz RMII Blue Crystal load capacitance
R181 Resistor 25 MHz RMII Blue Crystal selection
R184 Resistor 25 MHz RMII Blue Crystal selection
Y8 Crystal 25 MHz RMII Blue 25 MHz crystal
R183 Resistor 25 MHz RMII Red Crystal measurement
Only use in factory.
If mounted, the crystal
behavior will be
degraded.
R35 Resistor 32 kHz Red Crystal measurement
Only use in factory.
If mounted, the crystal
behavior will be
degraded.
U20 Module ATWILC3000 Blue ATWILC3000 module –
J15 Connector Debug Blue WILC3000 debug interface –
J16 Connector Debug Blue WILC3000 debug interface –
R232 Resistor Debug Blue Debug CTS pull-up –
R233 Resistor Debug Blue Debug RTS pull-up –
R179 Resistor nRST_OUT Blue
nRST selection instead of
NRST_OUT
Remove R180.
R118 Resistor SD Card Red SDMMC1_1V8_SEL pull-up –
C127 Capacitor Supply Red VLDO1 decoupling –
Note: Excessive
capacitor load on the
MCP16502 DCDC or
LDO lines can result
in output instability and
power-on sequence
failure.
C128 Capacitor Supply Red VDD_3V3 decoupling
C220 Capacitor Supply Red VDD_3V3_WILC decoupling
C240 Capacitor System Blue
nSTART decoupling and startup
configuration The product starts
automatically.
SAMA7G54-EK
Appendix B. Unmounted Elements
©
2022 Microchip Technology Inc.
and its subsidiaries
User Guide
DS50003273A-page 81