...........continued
Ref.
Type
Feature
Color
Status
Used for
What to do if mounted
J14
Connector
Tamper
Blue
Tamper pins use
–
R164
Resistor
Ethernet
RGMII
Red
Gigabit Ethernet 125 MHz clock line –
Figure 7-2. Unmounted Components Overview: Bottom View
The following table lists the bottom side unmounted components and their functionalities.
Table 7-2. Bottom Side Unmounted Elements
Ref.
Type
Feature
Color
Status
Used for
What to do if mounted
C77
Capacitor
32 kHz
Blue
MEMS oscillator decoupling
Remove Y1, C66 and
C72.
R38
Resistor
32 kHz
Blue
MEMS oscillator selection
Y4
MEMS
oscillator
32 kHz
Blue
32 kHz MEMS generation
R266
Resistor
Debug
Red
JTAG TCK pull-up
R249
Resistor
J-Link-OB
Red
Boundary scan selection
If mounted, at boot
the device enters in
boundary scan. J-Link-
OB will never start.
R134
Resistor
nRST_OUT
Blue
nRST selection instead of
NRST_OUT
Remove R136.
SAMA7G54-EK
Appendix B. Unmounted Elements
©
2022 Microchip Technology Inc.
and its subsidiaries
User Guide
DS50003273A-page 82