RL78/L12

Microcontrollers & Microprocessors

Renesas MCU Guide

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Overview

RL78/L12 microcontrollers have a built-in segment LCD driver. Three LCD driving voltage generation methods (external resistance division, capacitive split, and internal voltage boost) are supported, corresponding to a variety of segment LCD panels. They realize low current consumption^{Note 1}: external resistance division: 1.60 μA^{Note 2}, internal voltage boost: 1.19 μA, and capacitive split: 0.68 µA. With a lineup of 32 to 64-pin products supporting up to 280 segments, these microcontrollers are perfect for small devices with built-in LCD panels such as small appliances and healthcare devices.

Note 1: Current (typ.) at 1/3 bias, subclock operation, HALT mode, and RTC operation.

Note 2: Resistance value for external resistance division = 1000 kΩ.

RL78/L12 Block Diagram

CPU: RL78 core, Max. 24MHz
Voltage: 1.6V to 5.5V
Package: 64-pin QFN, 32 to 64-pin QFP
Memory: SRAM Max. 1.5KB, Program Flash Max. 32KB

Healthcare
Home Appliance
Office
Security

Documentation

Title	Type	Date
RL78/L12 Data Sheet Rev.2.20 PDF1.20 MB	Datasheet	Mar 15, 2022
RL78/L12 User's Manual: Hardware Rev.2.20 PDF6.02 MB日本語, 简体中文	Manual - Hardware	Mar 15, 2022
How to automate CUnit tests in e² studio and Jenkins PDF2.26 MB日本語	Application Note	Jun 15, 2022
Smart Configurator, Code Generator Project Porting Procedures for CS+ and e² studio PDF1.42 MB日本語	Application Note	Mar 7, 2022
RL78 Family FFT Library: Deployment Guide Rev.1.05 PDF290 KB日本語 Related Files: Sample Code	Application Note	Oct 25, 2021
RL78 Family RL78 Digital Signal Controller Library - Filter Rev.2.01 PDF887 KB日本語 Related Files: Sample Code	Application Note	Sep 30, 2021
Integrated Development Environment e² studio: How to use CUnit in e² studio Rev.1.01 PDF1.00 MB日本語	Application Note	Jul 26, 2021
Integrated Development Environment e² studio: How to use EGit in e² studio Rev.1.01 PDF1.79 MB日本語	Application Note	Jul 26, 2021
RL78 Family Open Source FAT File System M3S-TFAT-Tiny: Introduction Guide Rev.2.00 PDF304 KB日本語 Related Files: Sample Code	Application Note	Jul 14, 2021
RL78 Family SPI mode MultiMediaCard Driver: Introduction Guide Rev.2.00 PDF605 KB日本語 Related Files: Sample Code	Application Note	Jul 14, 2021
RL78/G14, RL78/G1C, RL78/L12, RL78/L13, RL78/L1C, RL78/G23 Group Clock Synchronous Single Master Control Software Using CSI Mode of Serial Array Unit Rev.1.06 PDF711 KB日本語 Related Files: Sample Code	Application Note	Jul 14, 2021
RX Family, RL78 Family, 78K0R/Kx3-L Macronix International MX25/66L Family Serial NOR Flash Memory Control Software Rev.1.03 PDF934 KB日本語 Related Files: Sample Code	Application Note	Jul 14, 2021
RL78 Family M3S-S2-Tiny: Introduction Guide Rev.2.00 PDF231 KB日本語 Related Files: Sample Code	Application Note	May 13, 2021
RL78 Family SHA Hash Function Library: Introduction Guide Rev.2.00 PDF282 KB日本語 Related Files: Sample Code	Application Note	Apr 23, 2021
LIN Controller Usage: Applications and Frequently Asked Questions Rev.2.01 PDF1.03 MB	Application Note	Jan 5, 2021
RL78/G14, H8/36109 Migration Guide from H8 to RL78: 14-Bit PWM Rev.1.00 PDF304 KB日本語	Application Note	Dec 21, 2020
RL78/G14, H8/36109 Migration Guide from H8 to RL78: A/D Converter Rev.1.00 PDF419 KB日本語	Application Note	Dec 21, 2020
RL78/G14, H8/36109 Migration Guide from H8 to RL78: Band-Gap Regulator, Power-On Reset & Low-Voltage Detection Circuits Rev.1.00 PDF264 KB日本語	Application Note	Dec 21, 2020
RL78/G14, H8/36109 Migration Guide from H8 to RL78: CPU architecture Rev.1.00 PDF290 KB日本語	Application Note	Dec 21, 2020
RL78/G14, H8/36109 Migration Guide from H8 to RL78: Clock Pulse Generators Rev.1.00 PDF383 KB日本語	Application Note	Dec 21, 2020
RL78/G14, H8/36109 Migration Guide from H8 to RL78: Exception Handling Rev.1.00 PDF378 KB日本語	Application Note	Dec 21, 2020
RL78/G14, H8/36109 Migration Guide from H8 to RL78: I/O Ports Rev.1.00 PDF216 KB日本語	Application Note	Dec 21, 2020
RL78/G14, H8/36109 Migration Guide from H8 to RL78: IIC2 Rev.1.00 PDF261 KB日本語	Application Note	Dec 21, 2020
RL78/G14, H8/36109 Migration Guide from H8 to RL78: Power supply circuit Rev.1.00 PDF224 KB日本語	Application Note	Dec 21, 2020
RL78/G14, H8/36109 Migration Guide from H8 to RL78: Power-Down Modes Rev.1.00 PDF501 KB日本語	Application Note	Dec 21, 2020
RL78/G14, H8/36109 Migration Guide from H8 to RL78: ROM (Flash memory) Rev.1.00 PDF283 KB日本語	Application Note	Dec 21, 2020
RL78/G14, H8/36109 Migration Guide from H8 to RL78: Realtime Clock (RTC) Rev.1.00 PDF380 KB日本語	Application Note	Dec 21, 2020
RL78/G14, H8/36109 Migration Guide from H8 to RL78: SCI3 Rev.1.00 PDF439 KB日本語	Application Note	Dec 21, 2020
RL78/G14, H8/36109 Migration Guide from H8 to RL78: Timer V Rev.1.00 PDF481 KB日本語	Application Note	Dec 21, 2020
RL78/G14, H8/36109 Migration Guide from H8 to RL78: Watchdog Timer Rev.1.00 PDF248 KB日本語	Application Note	Dec 21, 2020
RL78/G14, H8/36109 Migration Guide from H8 to RL78: Timer B1 Rev.1.00 PDF323 KB日本語	Application Note	Dec 18, 2020
RL78/G14, H8/36109 Migration Guide from H8 to RL78: Timer RC Rev.1.00 PDF413 KB日本語	Application Note	Dec 18, 2020
RL78/G14, H8/36109 Migration Guide from H8 to RL78: Timer RD Rev.1.00 PDF551 KB日本語	Application Note	Dec 7, 2020
7-Segment LED Lighting Control (Arduino API) Rev.1.00 PDF951 KB日本語 Related Files: Sample Code	Application Note	Jul 10, 2020
Arduino API Introduction Guide Rev.1.00 PDF1.65 MB日本語	Application Note	Jun 30, 2020
RL78/L12 Multi-Cycle Computer for Bicycles Rev.1.00 PDF1.08 MB日本語 Related Files: RL78/L12 自転車マルチサイクルコンピュータ Rev.1.00 - Sample Code	Application Note	May 15, 2020
RL78/G13, 78K0/Kx2 Migration Guide from 78K0 to RL78:Serial Interface IIC0 to Serial Interface IICA Rev.1.00 PDF330 KB日本語	Application Note	Nov 11, 2019
IEC60730/60335 Self Test Library of CARL78 for RL78 MCU extended Application Notes (R01AN4823EJ0110) Rev.1.10 PDF2.36 MB日本語

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Compact LCD Microcontrollers with Low Power Consumption, Suitable for Small Appliances and Healthcare Devices

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RL78/L12 Block Diagram

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RL78/L12

Compact LCD Microcontrollers with Low Power Consumption, Suitable for Small Appliances and Healthcare Devices

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RL78/L12 Block Diagram

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