RL78/I1A

Features

CPU: RL78 core, Max. 32MHz
Voltage: 2.7V to 5.5V
Package: 32-pin QFN, 20 to 38-pin SOP
Memory: SRAM Max. 4KB, Program Flash Max. 64KB

Find Other Products in RL78 Low-Power 8 & 16-Bit MCUs

RL78/I1A Block Diagram

Description

RL78/I1A microcontrollers realize PWM output of a minimum 0.98 ns resolution using 64 MHz timer operation and dithering function, supporting fine dimming and toning. Through cooperation between the PWM timer and comparator/external interrupt input, PFC control and protection functions can be realized by hardware. Low consumption current of 3.3 mA during LED and power supply control and 0.23 μA when waiting for UART (DALI) communication allows the power consumption of the system to be reduced. DALI/DMX512 lighting communication and Power Management Bus (PMBus) and System Management Bus (SMBus) power communication are supported. These microcontrollers can be used in LED lighting equipment and digital power supplies.

Parameters

Attributes	Value
Program Memory (KB)	32, 64
Data Flash (KB)	4
RAM (KB)	2, 4
Carrier Type	Bulk (Tray), Magazine, Tape & Reel
Supply Voltage (V)	2.7 - 5.5
I/O Ports	16, 26, 34
Temp. Range (°C)	Ta = -40 to +105, Ta = -40 to +125
Operating Freq (Max) (MHz)	32
USB FS (host ch/device ch)	( 0 / 0 )
SCI or UART (ch)	2, 3
SPI (ch)	0, 1
I2C (#)	1
CAN (ch)	0
CAN-FD (ch)	0
Wireless	No
LIN (#)	1
16-Bit Timer (ch) (#)	11, 12
12-Bit A/D Converter (ch)	0
10-Bit A/D Converter (ch)	6, 11
24-Bit Sigma-Delta A/D Converter (ch)	0
12-Bit D/A Converter (ch)	0
10-Bit D/A Converter (ch) (#)	0
8-Bit D/A Converter (ch)	0
Capacitive Touch Sensing Unit (ch)	0
Segment LCD Controller	No
Security & Encryption	No

Package Options

Pkg. Type	Pkg. Dimensions (mm)	Lead Count (#)	Pitch (mm)
LSSOP	6 x 4 x 1.45	20	0.65
LSSOP	9.85 x 6.1 x 1.4	30	0.65
SSOP	12 x 6 x 2	38	0.65

Application Block Diagrams

Voice Activated DALI Lighting Controls

One-chip DALI lighting control design with multi-language voice activation and optimized power.

Additional Applications

Home Appliance
Lighting
Motor Control
Power Supply

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Part Number	Status	Samples	Longevity	Stock	Package	Budgetary Price (USD)	Carrier Type	Family Name	Series Name	Group Name	CPU Architecture	Main CPU	Sub CPU	Floating Point Unit	Bit Length	Program Memory (KB)	Data Flash (KB)	RAM (KB)	ECC SRAM	Lead Count (#)	Pitch (mm)	Pkg. Dimensions (mm)	Number of Supply Voltage(s) (#)	Supply Voltage (V)	I/O Ports	DMAC or DTC	DMA (ch)	Temperature Sensor (ch) (#)	Power-On Reset	Watchdog Timer (ch)	External Memory Bus (bit)	DRAM I/F	3D GPU	Accelerator	MOQ	Temp. Range (°C)	External Interrupt Pins (#)	LVD or PVD	Operating Freq (Max) (MHz)	Sub-clock (32.768 kHz)	On-chip Oscillator	Ethernet speed	USB FS (host ch/device ch)	USB HS (host ch/device ch)	USB SS (host ch/device ch)	PCI Express (generation and ch)	SCI or UART (ch)	SPI (ch)	I2C (#)	Wireless	IrDA	LIN (#)	High Resolution Output Timer	PWM Output (pin#)	16-Bit Timer (ch) (#)	Standby operable timer	Asynchronous General Purpose Timer / Interval Timer (ch)	RTC	10-Bit A/D Converter (ch)	Analog Comparator (ch)	PGA (ch)	Graphics LCD Controller	Camera I/F (Parallel)	Image Codec	2D Drawing Engine	Segment LCD Controller	Security & Encryption	Debug Interface	Moisture Sensitivity Level (MSL)	Country of Assembly	Country of Wafer Fabrication
R5F1076CGSP#V0	Active	N/A	2031 Dec	In Stock	LSSOP	1ku \| $1.2	Magazine	RL78	RL78/I1x	I1A	RL78	RL78-S2	No	No	16	32KB	4KB	2KB	No	20#	0.65mm	6 x 4 x 1.45	1#	2.7 - 5.5	16	DMAC	2	1#	Yes	1	No	No	No	No	1	Ta = -40 to +105	7#	Yes	32MHz	No	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	2	0	1#	No	No	1#	No	7	11#	No	1	Yes	6	4	1	No	No	No	No	No	No	Single wire serial	3	CHINA	JAPAN
R5F1076CGSP#X0	Active	N/A	2031 Dec	Out of Stock	LSSOP	1ku \| $1.2	Tape & Reel	RL78	RL78/I1x	I1A	RL78	RL78-S2	No	No	16	32KB	4KB	2KB	No	20#	0.65mm	6 x 4 x 1.45	1#	2.7 - 5.5	16	DMAC	2	1#	Yes	1	No	No	No	No	4000	Ta = -40 to +105	7#	Yes	32MHz	No	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	2	0	1#	No	No	1#	No	7	11#	No	1	Yes	6	4	1	No	No	No	No	No	No	Single wire serial	3	CHINA	JAPAN
R5F1076CMSP#V0	Active	N/A	2031 Dec	In Stock	LSSOP	1ku \| $1.32	Magazine	RL78	RL78/I1x	I1A	RL78	RL78-S2	No	No	16	32KB	4KB	2KB	No	20#	0.65mm	6 x 4 x 1.45	1#	2.7 - 5.5	16	DMAC	2	1#	Yes	1	No	No	No	No	1	Ta = -40 to +125	7#	Yes	32MHz	No	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	2	0	1#	No	No	1#	No	7	11#	No	1	Yes	6	4	1	No	No	No	No	No	No	Single wire serial	3	CHINA	JAPAN
R5F1076CMSP#X0	Active	N/A	2031 Dec	Out of Stock	LSSOP	1ku \| $1.32	Tape & Reel	RL78	RL78/I1x	I1A	RL78	RL78-S2	No	No	16	32KB	4KB	2KB	No	20#	0.65mm	6 x 4 x 1.45	1#	2.7 - 5.5	16	DMAC	2	1#	Yes	1	No	No	No	No	4000	Ta = -40 to +125	7#	Yes	32MHz	No	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	2	0	1#	No	No	1#	No	7	11#	No	1	Yes	6	4	1	No	No	No	No	No	No	Single wire serial	3	CHINA	JAPAN
R5F107ACGSP#V0	Active	N/A	2031 Dec	In Stock	LSSOP	1ku \| $1.28	Bulk (Tray)	RL78	RL78/I1x	I1A	RL78	RL78-S2	No	No	16	32KB	4KB	2KB	No	30#	0.65mm	9.85 x 6.1 x 1.4	1#	2.7 - 5.5	26	DMAC	2	1#	Yes	1	No	No	No	No	1	Ta = -40 to +105	10#	Yes	32MHz	No	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	3	0	1#	No	No	1#	No	13	12#	No	1	Yes	11	6	1	No	No	No	No	No	No	Single wire serial	3	MALAYSIA	JAPAN
R5F107ACGSP#X0	Active	N/A	2031 Dec	Out of Stock	LSSOP	1ku \| $1.28	Tape & Reel	RL78	RL78/I1x	I1A	RL78	RL78-S2	No	No	16	32KB	4KB	2KB	No	30#	0.65mm	9.85 x 6.1 x 1.4	1#	2.7 - 5.5	26	DMAC	2	1#	Yes	1	No	No	No	No	2500	Ta = -40 to +105	10#	Yes	32MHz	No	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	3	0	1#	No	No	1#	No	13	12#	No	1	Yes	11	6	1	No	No	No	No	No	No	Single wire serial	3	MALAYSIA	JAPAN
R5F107ACMSP#V0	Active	N/A	2031 Dec	In Stock	LSSOP	1ku \| $1.41	Bulk (Tray)	RL78	RL78/I1x	I1A	RL78	RL78-S2	No	No	16	32KB	4KB	2KB	No	30#	0.65mm	9.85 x 6.1 x 1.4	1#	2.7 - 5.5	26	DMAC	2	1#	Yes	1	No	No	No	No	1	Ta = -40 to +125	10#	Yes	32MHz	No	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	3	0	1#	No	No	1#	No	13	12#	No	1	Yes	11	6	1	No	No	No	No	No	No	Single wire serial	3	MALAYSIA	JAPAN
R5F107ACMSP#X0	Active	N/A	2031 Dec	Out of Stock	LSSOP	1ku \| $1.41	Tape & Reel	RL78	RL78/I1x	I1A	RL78	RL78-S2	No	No	16	32KB	4KB	2KB	No	30#	0.65mm	9.85 x 6.1 x 1.4	1#	2.7 - 5.5	26	DMAC	2	1#	Yes	1	No	No	No	No	2500	Ta = -40 to +125	10#	Yes	32MHz	No	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	3	0	1#	No	No	1#	No	13	12#	No	1	Yes	11	6	1	No	No	No	No	No	No	Single wire serial	3	MALAYSIA	JAPAN
R5F107AEGSP#V0	Active	N/A	2031 Dec	In Stock	LSSOP	1ku \| $1.53	Bulk (Tray)	RL78	RL78/I1x	I1A	RL78	RL78-S2	No	No	16	64KB	4KB	4KB	No	30#	0.65mm	9.85 x 6.1 x 1.4	1#	2.7 - 5.5	26	DMAC	2	1#	Yes	1	No	No	No	No	1	Ta = -40 to +105	10#	Yes	32MHz	No	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	3	0	1#	No	No	1#	No	13	12#	No	1	Yes	11	6	1	No	No	No	No	No	No	Single wire serial	3	MALAYSIA	JAPAN
R5F107AEGSP#X0	Active	N/A	2031 Dec	Out of Stock	LSSOP	1ku \| $1.53	Tape & Reel	RL78	RL78/I1x	I1A	RL78	RL78-S2	No	No	16	64KB	4KB	4KB	No	30#	0.65mm	9.85 x 6.1 x 1.4	1#	2.7 - 5.5	26	DMAC	2	1#	Yes	1	No	No	No	No	2500	Ta = -40 to +105	10#	Yes	32MHz	No	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	3	0	1#	No	No	1#	No	13	12#	No	1	Yes	11	6	1	No	No	No	No	No	No	Single wire serial	3	MALAYSIA	JAPAN
R5F107AEMSP#V0	Active	N/A	2031 Dec	In Stock	LSSOP	1ku \| $1.68	Bulk (Tray)	RL78	RL78/I1x	I1A	RL78	RL78-S2	No	No	16	64KB	4KB	4KB	No	30#	0.65mm	9.85 x 6.1 x 1.4	1#	2.7 - 5.5	26	DMAC	2	1#	Yes	1	No	No	No	No	1	Ta = -40 to +125	10#	Yes	32MHz	No	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	3	0	1#	No	No	1#	No	13	12#	No	1	Yes	11	6	1	No	No	No	No	No	No	Single wire serial	3	MALAYSIA	JAPAN
R5F107AEMSP#X0	Active	N/A	2031 Dec	Out of Stock	LSSOP	1ku \| $1.68	Tape & Reel	RL78	RL78/I1x	I1A	RL78	RL78-S2	No	No	16	64KB	4KB	4KB	No	30#	0.65mm	9.85 x 6.1 x 1.4	1#	2.7 - 5.5	26	DMAC	2	1#	Yes	1	No	No	No	No	2500	Ta = -40 to +125	10#	Yes	32MHz	No	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	3	0	1#	No	No	1#	No	13	12#	No	1	Yes	11	6	1	No	No	No	No	No	No	Single wire serial	3	MALAYSIA	JAPAN
R5F107DEGSP#V0	Active	N/A	2031 Dec	In Stock	SSOP	1ku \| $1.66	Bulk (Tray)	RL78	RL78/I1x	I1A	RL78	RL78-S2	No	No	16	64KB	4KB	4KB	No	38#	0.65mm	12 x 6 x 2	1#	2.7 - 5.5	34	DMAC	2	1#	Yes	1	No	No	No	No	1	Ta = -40 to +105	11#	Yes	32MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	3	1	1#	No	No	1#	No	15	12#	No	1	Yes	11	6	1	No	No	No	No	No	No	Single wire serial	3	MALAYSIA	JAPAN
R5F107DEGSP#X0	Active	N/A	2031 Dec	In Stock	SSOP	1ku \| $1.66	Tape & Reel	RL78	RL78/I1x	I1A	RL78	RL78-S2	No	No	16	64KB	4KB	4KB	No	38#	0.65mm	12 x 6 x 2	1#	2.7 - 5.5	34	DMAC	2	1#	Yes	1	No	No	No	No	2500	Ta = -40 to +105	11#	Yes	32MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	3	1	1#	No	No	1#	No	15	12#	No	1	Yes	11	6	1	No	No	No	No	No	No	Single wire serial	3	MALAYSIA	JAPAN
R5F107DEMSP#V0	Active	N/A	2031 Dec	In Stock	SSOP	1ku \| $1.83	Bulk (Tray)	RL78	RL78/I1x	I1A	RL78	RL78-S2	No	No	16	64KB	4KB	4KB	No	38#	0.65mm	12 x 6 x 2	1#	2.7 - 5.5	34	DMAC	2	1#	Yes	1	No	No	No	No	1	Ta = -40 to +125	11#	Yes	32MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	3	1	1#	No	No	1#	No	15	12#	No	1	Yes	11	6	1	No	No	No	No	No	No	Single wire serial	3	MALAYSIA	JAPAN
R5F107DEMSP#X0	Active	N/A	2031 Dec	Out of Stock	SSOP	1ku \| $1.83	Tape & Reel	RL78	RL78/I1x	I1A	RL78	RL78-S2	No	No	16	64KB	4KB	4KB	No	38#	0.65mm	12 x 6 x 2	1#	2.7 - 5.5	34	DMAC	2	1#	Yes	1	No	No	No	No	2500	Ta = -40 to +125	11#	Yes	32MHz	Yes	Yes	No	( 0 / 0 )	( 0 / 0 )	( 0 / 0 )	No	3	1	1#	No	No	1#	No	15	12#	No	1	Yes	11	6	1	No	No	No	No	No	No	Single wire serial	3	MALAYSIA	JAPAN

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Filters

Application Note
RL78 Family FFT Library: Deployment Guide Rev.1.10
PDF 1.08 MB R20AN0150EJ0110 Rev.1.10 日本語 Dec 22, 2025
Provides information for deploying FFT (Fast Fourier Transform) library.
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Application Note
RL78 Family RL78 Digital Signal Controller Library - Filter Rev.2.06
PDF 1.83 MB R01AN1665EJ0206 Rev.2.06 日本語 Dec 22, 2025
Presents the specifications for a Digital Signal Controller (DSC) library function for the Renesas RL78, which includes generic specifications, detailed specifications for filter algorithm kernels, and guidelines for the DSC Library API.
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Application Note
RL78 Family RL78 Microcontroller (RL78 Protocol A) Serial Programming Guide Rev.1.10
PDF 770 KB R01AN0815EJ0110 Rev.1.10 日本語简体中文 Nov 20, 2025
This application note describes the specifications of the boot firmware in RL78 microcontrollers. An RL78 microcontroller has embedded boot firmware to control rewriting of its flash memory. The firmware controls rewriting of the contents of on-chip flash memory through the transmission and reception of commands between the programmer and RL78 microcontroller via serial communications.
Application Note
RL78 Family SHA Hash Function Library: Introduction Guide Rev.2.03
PDF 522 KB R20AN0211EJ0203 Rev.2.03 日本語 Aug 01, 2025
AI-generated Summary: The RL78 Family SHA Hash Function Library includes various source files, sample programs, and documentation to support SHA-1 and SHA-256 hash functions. It provides API functions to generate SHA-1 and SHA-256 hash digests, with SHA-256 support enhanced when combined with the RL78/G24 FAA accelerator. The library supports specific compiler environments and requires building designated source files depending on the API used. The FAA accelerator improves SHA processing speed and supports only SHA-256 with certain compilers.
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Release Note
e² studio 2025-04.1 Release Note
PDF 3.09 MB R20UT5674EG0101 Rev.1.01 May 21, 2025
Application Note
How to use IAR Systems compiler in e² studio
PDF 666 KB R20AN0733EJ0200 Rev.2.00 日本語 Sep 13, 2024
AI-generated Summary: The document explains how to integrate and use IAR Systems compilers within the e² studio development environment for Renesas microcontrollers. It details the installation of IAR Embedded Workbench and IAR Eclipse plugins, project creation, build configuration, and build execution using IAR compilers. The guide focuses on the RA family with the IAR ARM compiler but applies similarly to other Renesas devices. It also recommends using standalone Flexible Software Package configurators for RA and RZ families to enhance development. The environment setup assumes Windows 10 64-bit, e² studio 2024-07, and IAR tools installed.
End Of Life Notice
End Of Life Notice [SAF-B-24-0011]
PDF 8.06 MB SAF-B-24-0011 日本語 Jun 12, 2024
Manual - Software
EEPROM Emulation Library Type T02 (Tiny), European Release Rev.1.20
PDF 1.04 MB R01US0070ED0120 Rev.1.20 May 20, 2024
Application Note
IEC60730/60335 Self Test Library of CARL78 for RL78 MCU extended Application Notes Rev.1.20
PDF 1.96 MB R01AN4823EJ0120 Rev.1.20 日本語 May 20, 2024
AI-generated Summary: The document details self test software routines for RL78 microcontrollers to ensure compliance with IEC60730/60335 Class B safety standards. It covers CPU register tests, internal Flash and SRAM memory checks, system clock verification using independent clock sources, and peripheral tests such as A/D converters and watchdog timers. The self test library offers modular APIs for integration into applications, supporting reliability and safety in automatic electronic control systems like household appliances. The document also includes example usage, benchmarking, and additional hardware resources to assist developers in implementing robust safety functions.
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RL78/I1A User's Manual: Hardware
RECOMMENDED
PDF 9.87 MB R01UH0169EJ0340 Rev.3.40 日本語简体中文 Mar 29, 2024
RL78/I1A is designed for lighting and power applications. It integrates timers for PFC and DC/DC control, high-speed comparators, DACs, and communication I/F such as DALI and PMBus. These features make it suitable for industrial power supplies, lighting, IH, microwave ovens, and UPSs requiring high-resolution PWM control and analog signal processing. The user’s manual describes the CPU, peripherals, block diagrams, pin functions, and electrical and timing characteristics needed for system design.
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Flash programmer with Raspberry Pi (RL78 Protocol A)
PDF 569 KB R01AN7209EJ0100 Rev.1.00 日本語 Feb 29, 2024
AI-generated Summary: The flash programmer writes to the RL78 microcontroller's on-chip flash memory using RL78 Protocol A via serial programming. It uses Raspberry Pi 4 Model B+ as the programmer hardware and requires program files in Motorola S format. The sample program supports single-line or dedicated UART interfaces. Development and operation have been confirmed on Raspberry Pi OS 64-bit with specific GCC and Make versions. Raspberry Pi settings include enabling multiple UARTs via config.txt. Build instructions use standard make commands. The document covers hardware interfaces, software functions, error codes, and flowcharts for flash programming.
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Application Note
RL78/G14 Modbus ASCII/RTU Application Note Rev.2.00
PDF 1.55 MB R01AN5380EJ0200 Rev.2.00 日本語 Oct 20, 2023
AI-generated Summary: Modbus communication over UART is implemented using the RL78 microcontroller and Renesas RS-485 transceiver, supporting both Modbus ASCII and RTU modes. The system uses GPIO to control send/receive permissions and TAU0 timers to measure intervals between characters and frames, ensuring proper timing in communication. The network operates in a single-master/multi-slave configuration with up to 247 slaves, each having a unique address. The document details hardware configurations, UART communication settings, supported function codes, and interrupt handling for both master and slave modes. It also includes software structure, constants, variables, and instructions for running the system in various environments. PCB design files typically bundled include BOM, schematic, and Gerber files.
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RL78 FAMILY HARDWARE MANUAL GUIDE -ELECTRICAL CHARACTERISTICS EDITION
PDF 13.59 MB R01TU0439EJ0100 Rev.1.00 日本語 Jul 20, 2023
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RL78/G14 User's Manual: Hardware
RL78/G15 User's Manual: Hardware
RL78/G16 User's Manual: Hardware
RL78/G1A User's Manual: Hardware
RL78/G1C User's Manual: Hardware
RL78/G1D User's Manual: Hardware Rev.1.30
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RL78/G1H User's Manual: Hardware Rev.1.30
RL78/G1M, G1N User's Manual Hardware Rev.1.00
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RL78/G22 User's Manual: Hardware
RL78/G23 User's Manual: Hardware Rev.1.40
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RL78/I1A User's Manual: Hardware
RL78/I1B User's Manual: Hardware
RL78/I1C User's Manual: Hardware
RL78/I1D User's Manual: Hardware
RL78/I1E User's Manual: Hardware
RL78/L12 User's Manual: Hardware
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RL78/G24 User's Manual: Hardware Rev.1.20
Document
Notices of supplier addition to mold compound list
PDF 994 KB APE-D22-1189 日本語 Apr 27, 2023
Application Note
RL78 Flash Programmer (RL78 Protocol B) Rev.1.00
PDF 797 KB R01AN6782EJ0100 Rev.1.00 日本語 Feb 16, 2023
AI-generated Summary: The document explains how to program the internal flash memory of RL78 microcontrollers using RL78 Protocol B. It supports serial programming with Motorola S-format files and offers two modes: online mode, where the host PC writes via USB connection, and offline mode, where writing occurs by pressing a switch on the evaluation board after preloading data. The sample program runs on the RL78/G23-128p Fast Prototyping Board and requires specific development environments and tools, including Renesas Flash Driver RL78 Type01. Detailed hardware configurations, communication protocols, and software settings are provided for effective flash programming.
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Datasheets (1)

Datasheet
RL78/I1A Data Sheet Rev.3.30
RECOMMENDED
PDF 1.03 MB R01DS0171EJ0330 Rev.3.30 Mar 31, 2023
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Brochure

Manuals & Guides (4)

Manual - Software
EEPROM Emulation Library Type T02 (Tiny), European Release Rev.1.20
PDF 1.04 MB R01US0070ED0120 Rev.1.20 May 20, 2024
Manual - Hardware
RL78/I1A User's Manual: Hardware
RECOMMENDED
PDF 9.87 MB R01UH0169EJ0340 Rev.3.40 日本語简体中文 Mar 29, 2024
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Manual - Hardware
RL78 FAMILY HARDWARE MANUAL GUIDE -ELECTRICAL CHARACTERISTICS EDITION
PDF 13.59 MB R01TU0439EJ0100 Rev.1.00 日本語 Jul 20, 2023
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Manual - Hardware
RL78 Family User's Manual: Software Rev.2.30
PDF 1.3 MB R01US0015EJ0230 Rev.2.30 日本語 Apr 22, 2022

Application Notes & White Papers (114)

Application Note
RL78 Family FFT Library: Deployment Guide Rev.1.10
PDF 1.08 MB R20AN0150EJ0110 Rev.1.10 日本語 Dec 22, 2025
Provides information for deploying FFT (Fast Fourier Transform) library.
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Sample Code
Application Note
RL78 Family RL78 Digital Signal Controller Library - Filter Rev.2.06
PDF 1.83 MB R01AN1665EJ0206 Rev.2.06 日本語 Dec 22, 2025
Presents the specifications for a Digital Signal Controller (DSC) library function for the Renesas RL78, which includes generic specifications, detailed specifications for filter algorithm kernels, and guidelines for the DSC Library API.
Related Files:
Sample Code
Application Note
RL78 Family RL78 Microcontroller (RL78 Protocol A) Serial Programming Guide Rev.1.10
PDF 770 KB R01AN0815EJ0110 Rev.1.10 日本語简体中文 Nov 20, 2025
This application note describes the specifications of the boot firmware in RL78 microcontrollers. An RL78 microcontroller has embedded boot firmware to control rewriting of its flash memory. The firmware controls rewriting of the contents of on-chip flash memory through the transmission and reception of commands between the programmer and RL78 microcontroller via serial communications.
Application Note
RL78 Family SHA Hash Function Library: Introduction Guide Rev.2.03
PDF 522 KB R20AN0211EJ0203 Rev.2.03 日本語 Aug 01, 2025
AI-generated Summary: The RL78 Family SHA Hash Function Library includes various source files, sample programs, and documentation to support SHA-1 and SHA-256 hash functions. It provides API functions to generate SHA-1 and SHA-256 hash digests, with SHA-256 support enhanced when combined with the RL78/G24 FAA accelerator. The library supports specific compiler environments and requires building designated source files depending on the API used. The FAA accelerator improves SHA processing speed and supports only SHA-256 with certain compilers.
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Release Note
e² studio 2025-04.1 Release Note
PDF 3.09 MB R20UT5674EG0101 Rev.1.01 May 21, 2025

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Product Notices (PCN, EOL, etc) (4)

End Of Life Notice
End Of Life Notice [SAF-B-24-0011]
PDF 8.06 MB SAF-B-24-0011 日本語 Jun 12, 2024
Product Change Notice
Unification of a JEDEC tray and a embossed carrier tape for LQFP package (Additional Information & Correction)
PDF 4.86 MB PC-WRP-A001C/E 日本語 Jan 23, 2018
Product Change Notice
Unification of a JEDEC tray and a embossed carrier tape for LQFP package ( PC-WRP-A001B/E )
PDF 3.74 MB PC-WRP-A001B/E 日本語 Mar 08, 2017
Product Change Notice
Unification of a JEDEC tray and a embossed carrier tape for LQFP package ( PC-WRP-A001A/E )
PDF 1.46 MB PC-WRP-A001A/E 日本語 Jul 01, 2016

Errata & Technical Updates (10)

Technical Update
Correction for Incorrect Description Notice RL78/I1A Descriptions in the User's Manual: Hardware Rev. 3.20 Changed
PDF 556 KB TN-RL*-A0115A/E 日本語 Jan 20, 2023
Technical Update
Restriction regarding reading data Flash memory
PDF 213 KB TN-RL-A0094A/E 日本語 Apr 10, 2020
Technical Update
Restriction regarding Watchdog timer interrupt
PDF 154 KB TN-RLx-A086A/E 日本語 Apr 03, 2018
Technical Update
Restriction regarding Watchdog timer (TN-RLx-A069A/E)
PDF 186 KB TN-RLx-A069A/E 日本語 Nov 21, 2016
Technical Update
Correction for Incorrect Description Notice RL78/I1A Descriptions in the Hardware User's Manual Rev.2.10 Changed
PDF 8.56 MB TN-RLx-A024D/E 日本語 Sep 21, 2016
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Brochure

View More (10)

Quality & Reliability (1)

Product Reliability Report
R5F107XXX Reliability Report
PDF 409 KB MCR-22-0605 Sep 01, 2022

Marketing Collateral (1)

Flyer
The Art of Lighting
PDF 2.22 MB R30PF0024ED0600 Rev.6.00 Sep 03, 2012

Other (6)

Document
Notices of supplier addition to mold compound list
PDF 994 KB APE-D22-1189 日本語 Apr 27, 2023
Document
RL78/I1A GROUP SOLDERING CONDITIONS TABLE""
PDF 815 KB R01ZZ0075XJ0100 Rev.1.00 Jun 19, 2013
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Brochure
Document
RL78/I1A:Supply current characteristics (IDD-VDD)
PDF 152 KB MR7433 Jul 25, 2011
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Document
RL78/I1A:VOL-IOL (Drive Current)
PDF 183 KB MR7435 Jun 24, 2011
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RL78/I1A:VOH-IOH (Drive Current)
PDF 284 KB MR7434 Jun 24, 2011
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Brochure

View More (6)

Renesas Boards & Kits

QB-R5F107DE-TB

RL78/I1A (R5F107DEGSP) Target Board

As a central processing unit (CPU) board usable in connection with the on-chip debugging emulator E2 and E2 Lite, the RL78/I1A (R5F107DEGSP) target board achieves simple and easy evaluation of the target MCU.

RL78/I1A TPW-RL78I1A Evaluation Board for PFC and LED Control

This is an evaluation board that controls PFC and LEDx3ch by full digital using RL78/I1A.

Order Now

TCM-RL78I1A

RL78/I1A Lighting Communication Master Evaluation Board TCM-RL78I1A

This board can perform evaluation development for DALI, DMX512 and infrared communication master functions.

Order Now

Partner Boards & Kits

RL78 Family Microcontroller Board by HOKUTO DENSHI.

Evaluation

RL Family Microcontroller Board

This solution provides a general-purpose evaluation board featuring Renesas RL Family microcontrollers. It is offered as a standalone board or as kit products supporting functions such as LIN, CAN, touch key interfaces, and brushless motor control.

Provided By:

HOKUTO DENSHI

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Microcontrollers that Output High-resolution PWM for Fine Dimming and Toning of Led Lighting

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