An AP4 and Applilet is a standalone tool for automatically generating control programs (device driver programs) for peripheral modules in accordance with user settings. You can select the type of build tool (compiler). The control programs generated for the peripheral modules by the AP4 or Applilet are intended to suit the selected build tool.


We have revised the AP4 for RL78 and Applilet3 for RL78.

Learn More (Tool News) >>

A Note to Users of the AP4 for RX

From now on, we do not intend to add or modify the support for devices by the AP4 for RX. Please refer to the release notes for instructions on using the AP4 for RX.

Accordingly, although we will continue to support the AP4 for RX users, we recommend that you consider migrating to the Smart Configurator from the Code Generator Plug-in.

Regarding the Smart Configurator >>

AP4 for RX V1.15.01 Release Note >>


  1. Source code can also be generated for the IAR Embedded Workbench from IAR Systems and for MULTI® (support for RH850 and V850 family) from Green Hills Software and for the Development Studio (DS-5™; support for RZ family) from Arm® Limited.
  2. The Code Generator plug-in is useful in conjunction with the GNU tools or Renesas compiler packages.

Release Information

Details of upgrade (See Tool News)

Operating Environment


  • Standalone coding assistance tool
  • Control programs generated for the peripheral modules suit the selected build tool (compiler).
  • Simple operation by an easy-to-follow GUI
  • Includes a feature to check for contention by peripheral modules for pins
  • Supplies functions for operating peripheral modules in the form of an API

Product Lineup

MCU Product Name Latest Ver. Released
Family Series Group
RZ RZ/T RZ/T1 AP4 for RZ V1.08.00
Oct 05, 2018
RH850 RH850/E1x RH850/E1M-S, RH850/E1L AP4 for RH850 (Please contact us.) V1.02.00
Jan 22, 2018
RH850/F1x RH850/F1K AP4 for RH850 V1.05.00
Jul 20, 2018
RX RX100 RX110 (Note1), RX111 (Note1), RX113 (Note1), RX130 (Note1) AP4 for RX V1.15.01
Aug 27, 2018
RX200 RX230 (Note1), RX231 (Note1), RX23T (Note1), RX24T (Note1), RX24U (Note1)
RX600 RX64M (Note1), RX651 (Note1), RX65N (Note1)
RX700 RX71M (Note1)
RL78 RL78/F1x RL78/F1E AP4 for RL78 V1.17.00
Jul 22, 2019
RL78/G1x RL78/G10, RL78/G11, RL78/G1C, RL78/G1D, RL78/G1E, RL78/G1F, RL78/G1G, RL78/G1H
RL78/H1x RL78/H1D
RL78/I1x RL78/I1C, RL78/I1D, RL78/I1E
RL78/L1x RL78/L13, RL78/L1A, RL78/L1C
RL78/D1x RL78/D1A Applilet3 for RL78 V1.17.00
Jul 22, 2019
RL78/F1x RL78/F12, RL78/F13, RL78/F14, RL78/F15
RL78/G1x RL78/G1A, RL78/G12, RL78/G13, RL78/G14
RL78/I1x RL78/I1A
RL78/L1x RL78/L12
V850 V850ES/Jx V850ES/Jx3, V850ES/Jx3-E, V850ES/Jx3-H, V850ES/Jx3-L Applilet3 for V850 V1.01.00
Apr 6, 2015
V850E/Sx V850E/Sx3-H
78K 78K0/Ix 78K0/Ix2 Applilet3 for 78K V1.02.00
Apr 6, 2015
78K0/Kx 78K0/Kx2-L
78K0R/Fx 78K0R/Fx3
78K0R/Ix 78K0R/Ix3
78K0R/Kx 78K0R/Kx3, 78K0R/Kx3-A, 78K0R/Kx3-L
78K0R/Lx 78K0R/Lx3
V850 V850ES/Fx V850ES/Fx3 Applilet2 for V850ES/Fx3 V2.43
Oct 10, 2012
V850ES/Sx V850ES/Sx3 Applilet2 for V850ES/Sx3 V2.41
Oct 18, 2012
78K 78K0/Fx 78K0/Fx2 Applilet2 for 78K0/Fx2 V2.42
Oct 18, 2012
78K0/Kx 78K0/Kx2 Applilet2 for 78K0/Kx2 V2.42
Oct 18, 2012
78K0/Lx2 78K0/Lx2 Applilet2 for 78K0/Lx2 (Note2) V2.41
Oct 18, 2012
78K0/Lx3 Applilet2 for 78K0/Lx3 V2.41
Oct 18, 2012
78K0S/Kx 78K0S/Kx1+ Applilet2 for 78K0S/Kx1+ V2.41
Oct 18, 2012


  1. The Smart Configurator supports these devices of the RX Family. We recommend using the Smart Configurator for new development.
    Regarding the Smart Configurator >>
  2. Discontinued products. Technical support is available.

Information supporting development tools

Title Description
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e-learning Information for studying and learning about microcontrollers and microprocessors.
FAQ Frequently asked questions and useful hints for development.
Forum A forum and community site to share technical information, questions and opinions with others who use Renesas MCU's.
Tool News Tool release information and other important information.
Operating Environment Information on system requirements and operating environment for the latest version of tools.
Info on Discontinued Products A list of Renesas software and tools that have been discontinued and are no longer being offered for new projects.