Overview
Description
The RL78/G23 microcontroller group is a new generation of the RL78 family of microcontrollers, with 41μA/MHz CPU operation. The RL78/G23 group has the industry’s lowest power consumption with 210nA at stop (4KB SRAM retention), and a snooze mode sequencer which significantly reduces power consumption during intermittent operation. The RL78/G23 group features a wide operating voltage range of 1.6V to 5.5V at up to 32MHz, a broad range of package pin counts from 30 pins to 128 pins, and up to 768KB of flash memory. In addition to enhanced analog and security features, it also incorporates logic and event link controllers (ELCL) and the first capacitive touch sensing unit (CTSU2L) in the RL78 family. A rich development environment is also provided for the RL78/G23, including a fast prototyping board. This board allows users to write and debug programs with an easy-to-use GUI, by simply connecting a USB cable and a smart configurator without any additional tools required. The RL78/G23 is compatible with the existing RL78 family and can be a seamless replacement, making it suitable for a wide range of applications, from home appliance and consumer electronics to industrial equipment.
Features
- CPU: RL78 core, Max. 32MHz
- Up to 768kB Flash Memory and 48kB SRAM
- Memory: SRAM up to 48KB, Program Flash up to 768KB
- 8KB Data Flash to store data as in EEPROM
- Scalable from 30-pin to 128-pin packages
- Wide operating voltage range of 1.6V to 5.5V
- Enhanced Capacitive Sensing Unit (CTSU2L)
- Timer: 16-bit Timer (ch) x 16, 8-bit Timer, Watchdog Timer (ch) x 1,32-bit Interval Timer (ch) x 1
- PWM: PWM Output x 14
- Analog function: 12-bit A/D Converter (ch) x 26, 8-bit D/A - Converter (ch) x 2, Comparator x 2
- On-chip Oscillator Freq. (MHz): High-Speed: up to 32MHz
- Middle-Speed: up to 4MHz
- Low-speed: 32.768kHz
- Snooze mode sequencer
- Logic & Event link controller
- Others: RTC, Power-On Reset, Low Voltage Detection
- A large selection of packages (LQFP, QFN, LGA, BGA, WLCSP)
Comparison
Applications
Design & Development
Software & Tools
Sample Code
Boards & Kits
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
Support
Support Communities
Partners
Murata Manufacturing Co., Ltd.
Temperature detection solution: Combine with an NTC thermistor for precise high-temperature monitoring.
Support Communities
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RL78/G23 Possible to use DAC0 as reference input to Comparator 1 without having P2.2 as ANO0?
Hi.Target part is a RL78/G23 (R7F100GGF2DFB)If using DAC0 only as a reference to Comparator 1 (as below) is it still possible to use the pin, p2.2, that has the function ANO0 as a GPIO? The reason I ask is that the DAC block diagram shown ...
Mar 21, 2025 -
Firmware Upgrade RL78/G23
Hello team, We have implemented bootloader using Firmware Upgrade with reference to "r01an6374ej0203-rl78g23-fwupdate" document. Platform using RL78/G23 30 pin with 128Kb ROM. We have successfully jumped to application but the timer peripheral is not working. As per the document we have closed/disabled the timer ...
May 27, 2025 -
Live break points with E2 Lite on RL78/G23
Should it be possible to set (and clear) a break point whilst running the application with an E2 Lite on a RL78/G23 device without pausing the session? This is with IAREWRL78 EDE.I'm having to pause execution to modify a simple unconditional break. I thought the hardware ...
Aug 5, 2024
FAQs
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RL78/G23: Current consumption when measuring capacitive touch
Last Updated: 02/21/2023 Question: How much current is consumed when measuring capacitive touch? Is there any reference information available? Answer: The average current consumption measured with a capacitive touch cycle of 100 ms is 15.8 μA (reference value for the RL78/G23). Figure 1 ...
Feb 21, 2023 -
Differences between the touch functionality of the RL78/G22 and RL78/G23
Last Updated: 02/21/2023 Question: How does the internal touch functionality of the RL78/G22 differ from that of the RL78/G23? Answer: Multiple electrode connection (MEC) functionality has been added to the CTSU2La featured on the RL78/G22.Multiple touch channels can be ...
Feb 21, 2023 -
RL78/G23-64p Fast Prototyping Board applications
Like other RL78 microcontroller-equipped Fast Prototyping Boards, the board is not supposed to be incorporated into a product because it is mainly intended for use in initial development and prototyping.
Apr 13, 2021
Videos & Training
This video demonstrates how to import sketches using the RL78 Arduino library into e² studio, as well as how to build and debug them. By debugging in e² studio, you can obtain detailed information and verify the internal workings of the library, which is not possible with the Arduino IDE.
Related Resources
News & Blog Posts
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Apr 1, 2025
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Dec 18, 2023
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Apr 13, 2021
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