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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 consumptionNote 1: external resistance division: 1.60 μANote 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
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

Applications

  • Healthcare
  • Home Appliance
  • Office
  • Security

Documentation

Design & Development

Software & Tools
Code Generator Plug-in
Automatic driver generation tool for internal peripheral I/O modules through GUI settings [Standard features for Renesas IDE "e² studio" and CS+] [Support MCU/MPU: RL78, V850, 78K, RX]
Downloads
RL78/L12 Thermometer with UART Communication Functions Rev.1.00
 Code Generator Renesas
C Compiler Package for RL78 Family [CC-RL]
C Compiler Package for RL78 Family [IDE: CS+, e² studio]
 Compiler/Assembler Renesas
E2 emulator [RTE0T00020KCE00000R]
On-chip debugging emulator. Also available as a flash memory programmer. [Support MCU/MPU: RA, RE, RH850, R-Car D1, RL78, RX, RISC-V MCU]
Downloads
[Flyer] E2Emulator[RTE0T00020KCE00000R]Current Consumption Tuning Solution for RL78 family (E2 Emulator,CS+) Rev.1.00Current Consumption Tuning Solution for RL78 family (E2 Emulator, e² studio) Rev.1.00
 Emulator Renesas
E2 emulator Lite [RTE0T0002LKCE00000R]
On-chip debugging emulator. Also available as a flash memory programmer. [Support MCU/MPU: RA, RE, RL78, RX, RISC-V MCU]
 Emulator Renesas
RI78V4 V2 Real-time OS for RL78 Family
μITRON Specification real-time OS for RL78 Family [Required IDE : CS+]
ITRON OS Renesas
PG-FP6
Flash memory programmer [Programming software: Dedicated GUI-based software, the "FP6 Terminal"] [Support MCU/MPU and devices: RA, RE, RX, RL78, RH850, RISC-V MCU, Renesas Synergy, Power Management, Renesas USB Power Delivery Family, ICs for Motor Driver/Actuator Driver, SuperH RISC engine, V850, 78K, R8C]
 Programmer (Unit/SW) Renesas
Renesas Flash Programmer (Programming GUI)
Flash memory programming software [Support MCU/MPU and devices: RA, RE, RX, RL78, RH850, RISC-V MCU Renesas Synergy, DA1453x, DA1459x, DA1469x, DA1470x, Power Management, Renesas USB Power Delivery Family, ICs for Motor Driver/Actuator Driver, V850, 78K0R, 78K0]
 Programmer (Unit/SW) Renesas
Crypto Library
Robust encode library to ensure security for all types of system developments
 Security / Crypto Renesas
Code Flash Libraries (Flash Self Programming Libraries)
Libraries for the reprogramming of code area flash memory, including EEPROM emulation libraries for the code areas of 78K-family products
Downloads
Flash Self-programming Library Type T01, European Release Rev.1.20
 Self Programming Library (Flash Library) Renesas
SPI Serial EEPROM Driver
Device Drivers for SPI Bus Serial EEPROM R1EX25xxx Series and HN58X25xxx Series
Downloads
RX Family, RL78 Family, 78K0R/Kx3-L Renesas R1EX25xxx Series Serial EEPROM Control Software Rev.1.06
 Serial Memory Renesas
RL78 Web Simulator
Right online tools to support initial evaluation of the low power consumption RL78 Family. Lineup: MCU Simulator Online and Current Consumption Calculator. Free of charge.
 Simulator Renesas
QE for Current Consumption: A Dedicated Tool for Current Measurement
Development assistance tool helps to shorten the times taken in operations for the tuning of currents drawn. [Standard item in the "e² studio" and CS+ (CS+ for CC only) IDEs] [Support MCU/MPU: RX, RL78]
Downloads
Current Consumption Tuning Solution for RL78 family (E2 Emulator, e² studio) Rev.1.00Current Consumption Tuning Solution for RL78 family (E2 Emulator,CS+) Rev.1.00
 Solution Toolkit Renesas
Sound Playback/Compression System [M3S-S2-Tiny] for RL78 Family
Sound playback system for RL78 Family
 Sound / Voice Renesas
FFT Library
Fast Fourier Transform (FFT) Library
 DSP / FFT Renesas
I2C Serial EEPROM Driver
Device Drivers for I2C Bus Serial EEPROM R1EX24xxx Series, R1EV24xxx Series and HN58X24xxx Series
 Serial Memory Renesas
SPI/QSPI Serial Flash Memory, QSPI Serial Phase Change Memory Driver
Device Driver for SPI and QSPI Serial Flash Memory and QSPI Serial Phase Change Memory
Downloads
RX Family, RL78 Family, 78K0R/Kx3-L Micron Technology P5Q Serial Phase Change Memory Control Software Rev.1.04 - Sample CodeRX Family, RL78 Family, 78K0R/Kx3-L Micron Technology N25Q Serial NOR Flash Memory Control Software Rev.1.04 - Sample CodeRX Family, RL78 Family, 78K0R/Kx3-L Macronix International MX25/66L Family Serial NOR Flash Memory Control Software Rev.1.04 - Sample CodeRX Family, RL78 Family, 78K0R/Kx3-L Micron Technology M25P Series Serial Flash memory Control Software Rev.1.06RX Family, RL78 Family, 78K0R/Kx3-L Micron Technology M45PE Series Serial Flash memory Control Software Rev.1.06
RX Family, RL78 Family, 78K0R/Kx3-L Macronix International MX25/66L Family Serial NOR Flash Memory Control Software Rev.1.04
 Serial Memory Renesas
AP4, Applilet
Peripheral I/O driver generator compatible with third-party compilers and GNU compiler (for RZ, V850, RX, RL78, and 78K)
 Code Generator Renesas
Data Flash Libraries
Libraries for the reprogramming of data flash memory, including EEPROM emulation libraries for the data areas of RL78-family products
Downloads
Data Flash Access Library Type T02 (Tiny), European Release Rev.1.40Data Flash Access Library FDL-T01 RL78 Series, European Release Rev.1.10EEPROM Emulation Library Type T01, European Release, RL78 Family Rev.1.10
 Self Programming Library (Flash Library) Renesas
Simulator for e² studio of RL78 Family
Simulator for RL78 Family [Support IDE: e² studio] (Note: This product is included in the Renesas IDE "e² studio" and is not available separately.)
 Simulator Renesas
CS+
Renesas integrated development environment (IDE) [Support MCU/MPU: RH850, V850, RX, RL78, 78K0R, 78K0] (Note: CS+ is not generally promoted to U.S. and European customers.) (Note: To use Smart Configurator on CS+ for RL78/G23 and RX family MCUs, install the Smart Configurator for each MCU family separately downloading from ”Design & Support” > ”Development Tools” > ”Smart Configurator”)
 IDE and Coding Tool Renesas
e² studio - information for RL78 Family
Eclipse-based Renesas integrated development environment (IDE).
IDE and Coding Tool Renesas
IAR Embedded Workbench for Renesas RL78
IAR Embedded Workbench provides extensive support for RL78 devices. IAR Embedded Workbench is a complete set of development tools with leading optimization technology for creating powerful automotive applications.
 IDE and Coding Tool IAR Systems
Renesas IAR Embedded Workbench Device-Support-Packages
Renesas IAR Embedded Workbench Device-Support-Packages include all device-specific files to be used with the Embedded Workbench IDE.
 IDE and Coding Tool Renesas
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Software Downloads
PM2.5 Monitor with Portable Battery

PORTABLE-PM25-MONITOR-REF

Reference Designs
Learn More

Portable PM2.5 Monitor with Battery Reference Design

The PM2. 5 Monitor is a portable device that can measure and detect the concentration of atmospheric particulate matter (PM) of less than 2. 5 micrometers in real-time....

Featured Documents:
RL78/L12 PM2.5 Monitor with Portable Battery Design Files
RL78/L12 PM2.5 Monitor with Portable Battery User's Manual
QB-R5F10RLC-TB

QB-R5F10RLC-TB

Evaluation
Learn More

RL78/L12 (R5F10RLCAFB) Target Board

As a CPU board usable in connection with the on-chip debugging emulator E2, E2 Lite, E1(discontinued product), this product achieves simple and easy evaluation of the...

Renesas Starter Kit for RL78/L12

RL78/L12-Starter-Kit

Starter
Learn More

Renesas Starter Kit for RL78/L12

The Renesas Starter Kit for RL78/L12 is intended as a user-friendly introductory and evaluation tool for the RL78/L12 microcontroller. The board also provides a useful...

YRPBRL78L12 1

YRPBRL78L12

Evaluation
Learn More

YRPBRL78L12 Evaluation Board for RL78/L12

The Renesas Promotion Board is pre-programmed to work with the GUI provided on the included DVD to demonstrate the key low power capabilities of the RL78/L12 device...

Featured Documents:
YRPBRL78L12 Quick Start Guide Rev.1.00

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

Explore ECAD Models
Diagram of ECAD Models

Product Options

    Processing table
    PLP
    Program Memory (KB)
    RAM (KB)
    Lead Count (#)
    Temp. Range
    I/O Ports
    Timer
    ADC
    Human Machine Interface
    Moisture Sensitivity Level (MSL)
    Price (USD) | 1ku
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    R5F10RLCGFA#50
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    R5F10RGCGFB#50
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    R5F10RLAGFB#50
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    R5F10RLCAFB#50
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    		2036 Mar 32 1.5 64 -40 to 85°C 47 12-bit x 1-ch, 16-bit x 8-ch 10-bit x 10-ch LCD Segment Count x 280 3 1.297
    R5F10RLCGFB#50
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    R5F10RBAGFP#50
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    R5F10RFAGFP#50
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    R5F10RFAAFP#50
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    R5F10RGAAFB#50
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    		2034 Dec 8 1 52 -40 to 85°C 37 12-bit x 1-ch, 16-bit x 8-ch 10-bit x 10-ch LCD Segment Count x 208 3 1.485
    R5F10RJCAFA#50
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    R5F10RLAAFA#50
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    R5F10RLCAFA#50
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    R5F10RFCGFP#50
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    R5F10RGCAFB#50
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    R5F10RB8AFP#50
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    R5F10RBAAFP#50
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    		2034 Dec 16 1 32 -40 to 85°C 20 12-bit x 1-ch, 16-bit x 8-ch 10-bit x 4-ch LCD Segment Count x 52 3 0.8813
    R5F10RJAAFA#50
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    R5F10RLAGFA#50
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    R5F10RLAGNB#40
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    R5F10RLCGNB#40
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    R5F10RLCANB#40
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    R5F10RLAANB#40
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    R5F10RB8AFP#10
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    		2034 Dec 8 1 32 -40 to 85°C 20 12-bit x 1-ch, 16-bit x 8-ch 10-bit x 4-ch LCD Segment Count x 52 3
    R5F10RB8GFP#10
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    		2034 Dec 8 1 32 -40 to 105°C 20 12-bit x 1-ch, 16-bit x 8-ch 10-bit x 4-ch LCD Segment Count x 52 3 1.555
    R5F10RBAAFP#10
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    		2034 Dec 16 1 32 -40 to 85°C 20 12-bit x 1-ch, 16-bit x 8-ch 10-bit x 4-ch LCD Segment Count x 52 3 1.184
    R5F10RBAGFP#10
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    		2034 Dec 16 1 32 -40 to 105°C 20 12-bit x 1-ch, 16-bit x 8-ch 10-bit x 4-ch LCD Segment Count x 52 3 1.291
    R5F10RBCAFP#10
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    		2034 Dec 32 1.5 32 -40 to 85°C 20 12-bit x 1-ch, 16-bit x 8-ch 10-bit x 4-ch LCD Segment Count x 52 3 0.9912
    R5F10RBCGFP#10
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    		2034 Dec 32 1.5 32 -40 to 105°C 20 12-bit x 1-ch, 16-bit x 8-ch 10-bit x 4-ch LCD Segment Count x 52 3 1.338
    R5F10RF8AFP#10
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    R5F10RF8GFP#10
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    		2034 Dec 8 1 44 -40 to 105°C 29 12-bit x 1-ch, 16-bit x 8-ch 10-bit x 7-ch LCD Segment Count x 144 3 1.538
    R5F10RFAAFP#10
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    R5F10RFAGFP#10
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    		2034 Dec 16 1 44 -40 to 105°C 29 12-bit x 1-ch, 16-bit x 8-ch 10-bit x 7-ch LCD Segment Count x 144 3
    R5F10RFCAFP#10
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    		2034 Dec 32 1.5 44 -40 to 85°C 29 12-bit x 1-ch, 16-bit x 8-ch 10-bit x 7-ch LCD Segment Count x 144 3 1.061
    R5F10RFCGFP#10
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    		2034 Dec 32 1.5 44 -40 to 105°C 29 12-bit x 1-ch, 16-bit x 8-ch 10-bit x 7-ch LCD Segment Count x 144 3
    R5F10RG8AFB#10
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    		2034 Dec 8 1 48 -40 to 85°C 33 12-bit x 1-ch, 16-bit x 8-ch 10-bit x 9-ch LCD Segment Count x 176 3 0.5483
    R5F10RG8GFB#10
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    		2034 Dec 8 1 48 -40 to 105°C 33 12-bit x 1-ch, 16-bit x 8-ch 10-bit x 9-ch LCD Segment Count x 176 3 1.133
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    Videos & Training

    RL78 Quick Solutions

    The easy-to-build RL78 Quick Solutions feature Renesas' ultra-low power RL78 MCUs and analog devices. These solutions showcase device combinations that improve design performance and power efficiency to support your product development.

    Video List
    RL78 Quick Solutions