RX113 datasheet(123/131 Pages) RENESAS

123 / 131 page

R01DS0216EJ0120 Rev.1.20

Page 123 of 131

Sep 07, 2020

RX113 Group

5. Electrical Characteristics

5.15

Usage Notes

5.15.1

Connecting VCL Capacitor and Bypass Capacitors

This MCU integrates an internal voltage-down circuit, which is used for lowering the power supply voltage in the

internal MCU to adjust automatically to the optimum level. A 4.7-µF capacitor needs to be connected between this

internal voltage-down power supply (VCL pin) and VSS pin. Figure 5.67 to Figure 5.68 shows how to connect

external capacitors. Place an external capacitor close to the pins. Do not apply the power supply voltage to the VCL pin.

Insert a multilayer ceramic capacitor as a bypass capacitor between each pair of the power supply pins. Implement a

bypass capacitor to the MCU power supply pins as close as possible. Use a recommended value of 0.1 µF as the

capacitance of the capacitors. For the capacitors related to crystal oscillation, see section 9, Clock Generation Circuit

in the User’s Manual: Hardware. For the capacitors related to analog modules, also see section 36, 12-Bit A/D

Converter (S12ADb) in the User’s Manual: Hardware.

For notes on designing the printed circuit board, see the descriptions of the application note "Hardware Design Guide"

(R01AN1411EJ). The latest version can be downloaded from Renesas Electronics Website.

RX113 Datasheet(PDF) 123 Page - Renesas Technology Corp