Renesas RA Microcontrollers EK-RA6M2 v1 – User's Manual
R20UT4578EU0102 Rev.1.02 Page 26 of 32
Jul.29.20
5.6.2 On-Board Clock Crystals
The EK-RA6M2 board includes two precision crystal clock sources. A precision
12.000 MHz crystal is installed at location X1, and a precision 32.768 kHz
crystal is installed at location X2. These crystal clock sources are connected to
the Main MCU by default.
The MCU pins for the 12 MHz clock crystal may be connected to P212 and
P213. To disconnect the 12 MHz crystal, open copper jumpers E23 and E24,
and close copper jumpers E18 and E19.
The MCU pins for the 32.768 kHz clock crystal may be connected to P214 and
P215. To disconnect the 32.768 kHz crystal, open copper jumpers E25 and
E26, and close copper jumpers E22 and E27.
Figure 26. Crystal Clock Sources
5.6.3 User Potentiometer
A footprint for installation of a potentiometer and a recommended noise-bypass capacitor are provided
on the board. The footprint was designed for installation of a Bourns P/N 3352T-1-103LF, or equivalent,
as the potentiometer, and a Samsung P/N CL10B104KB8NNNC, or similar, as the noise-bypass
capacitor.
When the User Potentiometer is installed, copper jumper E36 must be closed to connect the User
Potentiometer to the MCU.
Table 17. Evaluation Kit Board User Potentiometer
Figure 27. User Potentiometer Circuit
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