Renesas RX Series User Manual

R01UH0823EJ0100 Rev.1.00 Page 1478 of 1823
Jul 31, 2019
RX23W Group 41. Bluetooth Low Energy (BLE)
41.4 Usage Notes
41.4.1 RF Transceiver Power-Supply
The RF transceiver power-supply is selectable as either from the DC-to-DC converter or linear regulator.
Figure 41.3 and Figure 41.4 show an example of the external connection circuit when the DC-to-DC converter or the
linear regulator is selected, respectively.
Figure 41.3 Example of the BLE Externally Connected Circuit When the DC-to-DC Converter is Selected
Figure 41.4 Example of the BLE Externally Connected Circuit When the Linear Regulator is Selected
Do not connect other pins or external circuits to the I/O pins (DCLOUT, DCLIN_D, or DCLIN_A) of the RF transceiver
power-supply whether the DC to DC converter or linear regulator is selected.
This MCU
DC-to-DC
converter
DCLOUT
10µH
2.2µF
DCLIN_A
DCLIN_D
L0
*1
Note 1. Including wiring for the inductor L0 is recommended to reduce the noise of the DC -to-DC
converter when designing the basic board.
Details are explained in the guidelines for designing Bluetooth boards (R01AN4534EJ).
Obtain the latest version of this document from the Renesas website .
RF transceiver
power-supply
This MCU
Linear
regulator
RF transceiver
power-supply
DCLOUT
0.47µF
DCLIN_A
DCLIN_D

Renesas RX Series Specifications

General

Brand	Renesas
Model	RX Series
Category	Microcontrollers
Language	English