Renesas RX Series User Manual

R01UH0823EJ0100 Rev.1.00 Page 221 of 1823
Jul 31, 2019
RX23W Group 11. Low Power Consumption
11. Low Power Consumption
11.1 Overview
This MCU has several functions for reducing power consumption, by setting clock dividers, stopping modules, changing
to low power consumption mode in normal operation, and changing to operating power control mode.
Table 11.1 lists the specifications of low power consumption functions, and Table 11 .2 lists the conditions to change to
low power consumption modes, states of the CPU and peripheral modules, and the method for exiting each mode.
After a reset, this MCU returns to normal mode, but modules except the DMAC, DTC, and RAM are stopped.
Note 1. For details, refer to section 9, Clock Generation Circuit.
Table 11.1 Specifications of Low Power Consumption Functions
Item Specification
Clock divider functions The frequency division ratio can be set independently for the system clock (ICLK), high speed
peripheral module clock (PCLKA), peripheral module clock (PCLKB), S12AD clock (PCLKD), and
FlashIF clock (FCLK).*
1
Module stop function Each peripheral module can be stopped independently by the module stop control register.
Function for transition to low
power consumption mode
Transition to a low power consumption mode in which the CPU, peripheral modules, or oscillators
are stopped is enabled.
Low power consumption modes
 Sleep mode
 Deep sleep mode
 Software standby mode
Operating power control modes
 Power consumption can be reduced in normal operation, sleep mode, and deep sleep mode by
selecting an appropriate operating power control mode according to the operating frequency and
operating voltage.
 Three operating power control modes are available
High-speed operating mode
Middle-speed operating mode
Low-speed operating mode

Renesas RX Series Specifications

General

Brand	Renesas
Model	RX Series
Category	Microcontrollers
Language	English