Renesas RX Series User Manual

R01UH0823EJ0100 Rev.1.00 Page 793 of 1823
Jul 31, 2019
RX23W Group 28. Realtime Clock (RTCe)
28.3.2 Clock and Count Mode Setting Procedure
Figure 28.3 shows how to set the clock and the count mode.
Figure 28.3 Clock and Count Mode Setting Procedure
Note 1. This step is not necessary if the count mode has been set concurrently with setting the START bit to 0.
A value corresponding to the count mode setting must be written to the RCR2.CNTMD bit.
START = 0
Set the START bit to 0
No
Yes
Wait for the RCR2.START bit to become 0
Select count mode
Supply 6 clocks of the count source
Set the RCR3 register
Wait for the RCR2.RESET bit to become 0
RESET = 0
No
Yes
Set the sub-clock oscillator
Execute RTC software reset
RCR2.CNTMD bit setting
*1
Write 1 to the RCR2.RESET bit

Renesas RX Series Specifications

General

Core	RXv1, RXv2, RXv3
Flash Memory	Up to 8 MB
RAM	Up to 1 MB
Operating Voltage	1.62V to 5.5V
Operating Temperature	-40°C to +85°C or +105°C
Package	BGA, LQFP
ADC Resolution	12-bit
DAC Resolution	12-bit
Communication Interfaces	SCI, SPI, I2C, USB, Ethernet, CAN
Architecture	32-bit
Security Features	Memory Protection Unit (MPU)