Overview
Description
The RL78/H1D microcontroller includes high precision analog functions such as Delta-Sigma A/D converter, SAR A/D converter, Programmable Gain amplifiers, Operational amplifier, and 8-bit/12-bit D/A converter. It also has a built-in LCD controller/driver which makes the RL78/H1D well suited for healthcare devices, especially blood pressure monitor.
Features
- CPU: RL78 core, Max. 24MHz
- Voltage: 1.8V to 5.5V
- Package: 64-pin BGA, 48 to 80-pin LFQFP
- Memory: SRAM Max. 8KB, Program Flash Max. 128KB
- Timer: 16-bit Timer (ch) x 9, 8-bit Timer (ch) x 6, Watchdog Timer (ch) x 1, 12-bit Interval Timer x 1 ch, Sampling output Timer Detector x 6ch input,3ch output, external signal sampler x 1ch
- PWM: PWM Output x 7
- Analog function: 10-bit A/D Converter (ch) x 3, Delta-Sigma A/D Converter, 8-bit D/A Converter (ch) x 1, 12-bit D/A Converter (ch) x 1
- On-chip Oscillator Freq. (MHz): High-Speed: 24, 16, 12, 8, 6, 4, 3, 2, 1MHz
Low-speed: 15kHz - Others: RTC, Power-On Reset, Low Voltage Detection
Comparison
Applications
Design & Development
Software & Tools
Software & Tools
Software title
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Software type
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Company
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FAT File System [M3S-TFAT-Tiny] for the RL78 Family FAT file system for RL78 Family
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File System | Renesas |
RI78V4 V1 Real-time OS for RL78 Family and 78K0R μITRON4.0 Specification real-time OS for RL78 Family and 78K0R [Required IDE : CS+]
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ITRON OS | Renesas |
RI78V4 V2 Real-time OS for RL78 Family μITRON Specification real-time OS for RL78 Family [Required IDE : CS+]
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ITRON OS | Renesas |
Sound Playback/Compression System [M3S-S2-Tiny] for RL78 Family Sound playback system for RL78 Family
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Sound / Voice | Renesas |
AP4, Applilet Peripheral I/O driver generator compatible with third-party compilers and GNU compiler (for RZ, V850, RX, RL78, and 78K)
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Code Generator | Renesas |
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]
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Code Generator | Renesas |
C Compiler Package for RL78 Family [CC-RL] C Compiler Package for RL78 Family [IDE: CS+, e² studio]
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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]
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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]
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Emulator | 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]
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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]
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Programmer (Unit/SW) | 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
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Self Programming Library (Flash Library) | Renesas |
Data Flash Libraries Libraries for the reprogramming of data flash memory, including EEPROM emulation libraries for the data areas of RL78-family products
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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.)
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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]
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Solution Toolkit | 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”)
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IDE and Coding Tool | Renesas |
e² studio - information for RL78 Family Eclipse-based Renesas integrated development environment (IDE).
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IDE and Coding Tool | Renesas |
Crypto Library Robust encode library to ensure security for all types of system developments
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Security / Crypto | 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
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Serial Memory | 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.
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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.
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IDE and Coding Tool | Renesas |
Reality AI Utilities Round-trip workflow for AI development and performance validation allowing to collect data, optimize models, and deploy directly to Renesas hardware
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Solution Toolkit | Renesas |
22 items
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Sample Code
Boards & Kits
Blood Pressure Monitoring Evaluation Kit for RL78/H1D
This RL78/H1D Blood Pressure Monitoring (BPM) Evaluation kit is an ideal solution for evaluating oscillometric blood pressure measurement. The solution is based on Renesas' RL78/H1D microcontroller.
Configuration
- Main Chassis with embedded reference software - 1 pcs.
- USB Cable - 1...
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.

Product Options
Applied Filters:
Support
Support Communities
Support Communities
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RTK0EH0003S02001BR - Unable to download PC GUI
Have bought the above blood pressure monitor evaluation kit - but I'm unable to download the PC interface/GUI from www.renesas.com/bpm-rssk. (404 error) any ideas?
Feb 10, 2021 -
Data Flash will erase the whole block in E2 studio.
... do not erase flash memory data. 2. Data Flash Disable Access. Any reason or setting will cause the problem in e2 studio ? PS: 1. MCU: RL78/H1D R5F11NMG2. DEBUG: E2 Lite3. FDL: T04 v1.05 CCRL 4. IDE: A. cs+, v8.06 B. e2 studio, v7.8 [locked by ...
Sep 16, 2021 -
IIR High pass filter sample code for RL78H1D .
Hi Team Does Official site have IIR filter example for RL78H1D soluction? Thanks, JayC.
Jan 9, 2020
FAQs
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RL78 Family: Reset signal generated by the power-on reset circuit (POR)
... G1F, RL78/G1G, RL78/G1H, RL78/G1M,RL78/G1N, RL78/G1P, RL78/G22, RL78/G23, RL78/G24, RL78/H1D, RL78/I1A, RL78/I1B, RL78/I1C, RL78/I1D, RL78/I1E, RL78/L12, RL78/L13, RL78 ...
Apr 28, 2025 -
RL78 Family: Relationship between A/D Conversion Resolution and A/D Conversion Time
... G16, RL78/G1C, RL78/G1D, RL78/G1F, RL78/G1G, RL78/G1H, RL78/G1M, RL78/G1N, RL78/G22, RL78/H1D, RL78/I1A, RL78/L12, RL78/L13 ✓: SelectableN/E: Not Eligible Note. It is selectable to read the ...
Nov 12, 2024 -
Tell me the points to be aware of when using the RL78 Code Generator with the WDT.
In the RL78 Code Generator, the Watchdog Timer (WDT) is set to 'Enabled' by default, as shown in the diagram below. To avoid unintended resets by the WDT, please either select 'Disabled' for the 'Watchdog Timer Operation Setting' or add a program to clear the Watchdog Timer counter.
Dec 10, 2024