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R-IN32M4-CL3 User's Manual: Board design edition
6.3
REF_REXT and REF_FILT Pins
The method of handling the REF_REXT and REF_FILT pins and recommended values for the connected components
are shown below.
6.3.1
Example of Circuit Configuration
Figure 6.5 Example of Circuit Configuration for REF_REXT and REF_FILT
6.3.2
Recommended Resistors
We recommend using components that satisfy the following conditions.
Resistance value: 2 k, 1% accuracy
Rated power: At least 0.0625 W
6.3.3
Recommended Ceramic Capacitors
We recommend using components that satisfy the following conditions.
Capacitance: 1.0 F, 10% accuracy
Thermal characteristic: C0G, X7R, or X5R
R18UZ0074EJ0100
Dec 24, 2019
Place the wiring separately from that for other high-frequency
signals, but place the components close to the pins.
Join the wires
at a single
point, and
connect this to
1.0
GND.
Place GND wiring as a guard.
2 kΩ
REF_REXT
REF_FILT
F
µ
6. Gigabit Ethernet PHY Pins
Page 17 of 61
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