Overview
Description
For users of the TCP/IP protocol stack [M3S-T4-Tiny] for RX Family
Support for the TCP/IP protocol stack [M3S-T4-Tiny] for RX Family has been discontinued on December 19, 2025. In the future, please use the following successors.
Successor: lwIP FIT* modules (Download the following two modules: r_lwip_rx Driver FIT and r_lwip_driver_rx Driver FIT)
Further information: [Notification] End of Support for TCP/IP Protocol Stack [M3S-T4-Tiny]and QE for TCP/IP [Technical Preview Edition] (PDF | English, 日本語)
* FIT: Firmware Integration Technology
M3S-T4-Tiny for RX Family (hereafter abbreviated "T4") is a communications protocol software library for RX Family. It makes TCP/IP communication possible in an Ethernet-connected network for all types of equipment that incorporates RX MCUs.
Components
- TCP/IP protocol stack software (library in binary form)
- Various sample driver software*
- TCP/IP protocol stack sample program
- TCP/IP protocol stack manual and other documents in a complete set
* The sample drivers are verified their running on the evaluation boards placed in the Operating Environment.
Features
- Memory-saving compact design (TCP/IP protocols processable by the internal memory of the microcontroller)
- OS's unnecessary
- Compliant with ITRON TCP/IP API specification
- We have prepared a wrapper which converts the specifications of the ITRON TCP/IP API into those of a socket API.
- Sample driver for LAN controller available
- Efficient development through a combined use of Renesas development tools supported
- We provide a range of the sample code for T4 as an application note.
Release Information
Latest Ver.: V.2.10 Release 00
Released: Apr 19, 2021
Details of upgrade (See Application Note)
Target Devices
Documentation
Log in required to subscribe
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| Type | Title | Date |
| Application Note |
PDF
346 KB
日本語
This application note describes the System Timer module which uses Firmware Integration Technology (FIT). This module uses System Timer to counts the year/month/day/hour/minute/seconds, and has simple scheduler function.
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| Application Note |
PDF
657 KB
日本語
The lightweight IP (lwIP) driver FIT module integrates with Firmware Integration Technology (FIT) and provides a porting layer for the lwIP FIT module, which is configured from the lwIP open-source software, on RX group microcontrollers. This FIT module is for use with the lwIP FIT module (r_lwip_rx, lwIP) as the upper layer and supports Ethernet communications in conformance with the TCP/IP.
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| Application Note |
PDF
407 KB
日本語
The lightweight IP (lwIP) module FIT module integrates with Firmware Integration Technology (FIT) and is generated from lightweight IP (lwIP), which is released as open-source software, by using the FIT. This FIT module is used in combination with the lightweight IP (lwIP) driver FIT module (r_lwip_driver_rx).
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| Tool News - Notification |
PDF
265 KB
日本語
The TCP/IP protocol stack [M3S-T4-Tiny] is middleware for connecting RX MCUs and SH2A MCUs to the network. Support for this product ended on December 19, 2025. For alternative products, please refer to Tool News.
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| Tool News - Note | PDF 187 KB 日本語 | |
| Application Note |
PDF
375 KB
日本語
AI-generated Summary:
The T4 Driver FIT module integrates the T4 software stack with the Ethernet driver by converting user-defined T4 functions to Ethernet driver APIs. It supports secure Initial Sequence Number generation when used with devices equipped with Trusted Secure IP (TSIP). The module accommodates different software stack configurations based on API style (ITRON TCP/IP or Socket) and TSIP presence, enabling flexible embedded system networking solutions.
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| Application Note |
PDF
988 KB
日本語
AI-generated Summary:
The document introduces the M3S-T4-Tiny TCP/IP stack for embedded systems within the RX family, designed for easy application implementation focusing on local connections rather than Internet use. It lacks advanced features like socket interfaces, IPSec, IPv6, and routing protocols. The guide details supported compilers, related documentation, module overviews, API information, sample programs, and setup instructions for communication verification. Limitations and environment requirements are also covered.
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| Application Note |
PDF
836 KB
日本語
AI-generated Summary:
The document details the mapping of socket APIs to T4 APIs for embedded TCP/IP communication within the RX Family. It lists functions such as opening, closing, sending, and receiving data through sockets, specifying corresponding T4 API calls. The module requires no hardware, depends on t4rx and t4driver_rx packages, and supports the Renesas RX Toolchain v2.05.00. Configuration options include setting UDP/TCP endpoints, buffer sizes, and work area sizes, with parameters defined in r_socket_rx_config.h for system customization.
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| Tool News - Note | PDF 108 KB 日本語 | |
| Tool News - Release | PDF 112 KB | |
| Tool News - Note | PDF 187 KB 日本語 | |
| Manual - Development Tools | PDF 93 KB 日本語 | |
| Tool News - Release | PDF 100 KB 日本語 | |
| Tool News - Note | PDF 92 KB 日本語 | |
| Tool News - Note | PDF 37 KB 日本語 | |
| Application Note |
PDF
479 KB
AI-generated Summary:
The document details Ethernet transmit and receive settings for the RX62N Group MCU, including initial hardware setup after power-on reset. It covers clock configurations, module stop functions, and I/O port settings essential for Ethernet communication. The initial settings program consists of source files like resetprg.c and hwsetup.c, which handle system initialization, clock setup, and peripheral enabling. It emphasizes proper initialization sequences and warns against accessing static variables before initialization.
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16 items
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Design & Development
Sample Code
Sample Code
Filters
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| Type | Title | Date Date |
| Sample Code | RX Family System Timer Module Firmware Integration Technology Rev.1.03 - Sample Code
[Software=RX Driver Package|V1.50],[Toolchains=CC-RX|V3.07.00;GNURX|14.02.00.202511;IAR Compiler for RX|v.5.20.1]
ZIP
1.66 MB
Compiler:
CC-RX, GNURX, ICCRX
Function:
Driver or Library
IDE:
e2 studio, IAR EWRX
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| Sample Code | RX Family Lightweight IP (lwIP) Driver Using Firmware Integration Technology Rev.1.11 - Sample Code
[Software=RX Driver Package|V1.50],[Toolchains=CC-RX|V3.07;GNURX|14.2.0.202505]
ZIP
37.17 MB
Compiler:
CC-RX, GNURX
Function:
Driver or Library
IDE:
e2 studio
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| Sample Code | RX Family Lightweight IP (lwIP) Module Using Firmware Integration Technology Rev.1.11 - Sample Code
[Software=RX Driver Package|V1.50],[Toolchains=CC-RX|V3.07;GNURX|14.2.0.202505]
ZIP
2.78 MB
Compiler:
CC-RX, GNURX
Function:
Driver or Library
IDE:
e2 studio
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| Sample Code | RX62N Group Ethernet Transmit and Receive Settings - Sample Code
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4 items
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News & Blog Posts
Additional Details
Operating Environment
| IDE | |
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| C Compiler |
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| Debugger (Optional) | |
| Evaluation Board | Ethernet:
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| Included Sample Driver | RX Family Ethernet Controller Driver |
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