Overview
Description
The E1 emulator is an on-chip debugging emulator and flash programmer which supports the major Renesas MCUs. This economical development tool provides basic debugging functionality. Available optional products, such as the hot-plug-in adaptor, allow you to extend debugging functionality or adjust connections.
Successor
| Item | Description |
|---|---|
| For RX or RL78 Family MCU Users | E2 emulator or E2 emulator Lite |
| For RH850 Family MCU Users | E2 emulator |
Note:
- No successors to E1 for V850、78K0R、78K0 or R8C* Family MCU Users.
*E8a emulator supports R8C/3x or R8C/Lx Series MCU.
Features
- Affordable yet powerful debugging device that can meet the actual development needs.
Learn more (On-chip Debuggers Performance Property) >> - Enhanced functions for faster debugging
In addition to basic debugging functions, the E1 supports execution time measurement and hot plug-in functionality (dependent on the MCU) that allows connection to the user system while the program is running. - Also functions as an on-board programmer.
Can be used as an on-board programming tool after the debugging, enabling smooth evaluation of the MCU. - Optimally suited for evaluating analogue functions such as A/D and D/A properties.
Electrical characteristics are the same as those of the actual MCU, since the actual MCU is used for debugging. - Serial, JTAG and LPD connections are supported.
For the communication system, serial, JTAG or LPD connection can be selected as required by the type of the target MCU. - Simple connection
Connection requires only a connector mounted on the user system, thus significantly reducing the possibility of loose connection. - Environmentally friendly material
The casing is made of plant-derived polylactide (PLA). - Learn More
Release Information
| Purpose of use | Software to be supported | Target devicesNote1 | Operating Environment |
|---|---|---|---|
| On-chip Debugging | CS+ *Evaluation Software Download | RX, RL78, RH850 [Details] Functions Supported by CS+ (XLSX) (XLSX | English, 日本語) | Operating Environment |
| e² studio *Download | RX, RL78, RH850 [Details] Release notes | ||
| IAR Embedded WorkbenchNote2 | RX, RL78, RH850 | Contact IAR Systems. | |
| Green Hills MultiNote2 | RH850 | Contact Green Hills Software. | |
| iSYSTEM winIDEANote2 | RL78, RH850 | Contact iSYSTEM. | |
| Flash Programming | Renesas Flash Programmer V3 *Evaluation Software Download | RL78, RX, RH850 [Details] List of MCUs supported by Renesas Flash Programmer V3 (PDF | English, 日本語) | Operating Environment |
Notes:
1. For details when using devices of V850 family, 78K0R, 78K0, or R8C family, see E1/E20 software for V850, 78K0R, 78K0, or R8C MCU >>.
2. As for tools produced by partners, contact them directly.
Target Devices
Target Family
- RX Family
- RL78 Family
- RH850 Family
Note: The E1 does not support RH850-family MCUs with the next-generation G4MH core, such as those of the RH850/E2x series. The E2 emulator is available for use with them. - V850 Family
- 78K Family
- R8C Family
Design & Development
Additional Details
Specifications
Note that some functions shown here may not be supported under the IDE you use. Performance property and Connection system also vary depending on the MCU type.
| Item | Description |
|---|---|
| See On-Chip Debugger Functional Overview (PDF | English, 日本語). |
| On-board programming | Supported |
| User interface | 14-way cable [7614-6002 (product of 3M Co., Ltd.) and 2514-6002 (product of 3M Limited)] |
| PC Interface | USB 2.0, full speed and high speed |
| Target board connection | Via attached user I/F cable (Connection signals vary by the target MCU type.) |
| Operating voltage range | 1.8V to 5.5V (depends on the target MCU) |
| Power supply from Emulator | Supply current: Up to 200mA, Supply voltage: 3.3V or 5V |
| External dimension (Except the protruding parts) | 109.4 mm×53.2 mm×18.6 mm |
| Conformance with overseas standards | European Standards: EN 55022 Class A, EN 55024 US FCC Standard: FCC part 15 Class A |
Components
- E1 Emulator main unit
- USB cable
- User's system I/F cable
- Software CD-ROM
- Installation guide
- Self-Checking Program
- USB driver
- E1/E20 Emulator User's Manual
System Configuration

Optional Products
Following optional products are provided to facilitate the use of the E1 emulators. Please make sure to choose the products that match MCUs you use.
Conversion Adapter
Converts the number and pitch of the pins in the connector for the connection with the emulator.
| MCUs | ||||||
|---|---|---|---|---|---|---|
| RX | RL78 | RH850 | V850 | 78K | R8C | |
| 14-Pin to 38-Pin Conversion Adapter for the E1 Emulator R0E000010CKZ00 R0E000010CKZ00 User's Manual (14-Pin to 38-Pin Conversion Adapter for E1 Emulator) (PDF | English, 日本語) An adapter for converting the 14-pin/2.54-mm pitch connector on the head of the emulator user interface cable to a 38-pin/0.5-mm pitch connector | lens | — | — | — | — | — |
| 38-Pin Conversion Adapter for the E1 Emulator QB-F14T38V850-01 QB-F14T38V850-01 ユーザーズ・マニュアル (E1エミュレータ用14ピン/38ピン変換アダプタ) / QB-F14T38V850-01 User's Manual (14-Pin to 38-Pin Conversion Adapter for E1 Emulator) (PDF) An adapter for changing to a 14-pin user interface for connection to a Mictor connector mounted on a V850-based target system | — | — | — | lens | — | — |
| Small Connector Conversion Adapter for the E1 Emulator R0E000010CKZ11 R0E000010CKZ11 User's Manual (Small Connector Conversion Adapter for E1 Emulator) (PDF | English, 日本語) An adapter for converting the 14-pin/2.54-mm pitch connector on the head of the emulator user interface cable to a 14-pin/1.27-mm pitch connector | lens | lens | lens | lens | lens | lens |
| 14-Pin to 16-Pin Conversion Adapter for the E1 Emulator QB-F14T16-01 QB-F14T16-01 ユーザーズマニュアル(E1エミュレータ用14ピン/16ピン変換アダプタ) / QB-F14T16-01 User's Manual (14-Pin to 16-Pin Conversion Adapter for E1 Emulator) (PDF) An adapter for changing the 14-pin/2.54-mm pitch connector on the head of the E1 emulator user interface cable to a MINICUBE2-compliant 16-pin/2.54-mm pitch connector | — | — | — | lens | lens | — |
lens Available | — Not Available
Hot-plug Adapter
Allows you to connect the emulator without having to turn off the system (Hot Plugin).
| MCUs | ||||||
|---|---|---|---|---|---|---|
| RX | RL78 | RH850 | V850 | 78K | R8C | |
| Hot-plug Adapter for the E1 Emulator R0E000010ACB00 R0E000010ACB00 User's Manual (Hot-plug Adapter for E1 Emulator) Rev.1.01 (PDF | English, 日本語) An adapter that allows connection of an emulator to a running user system without turning the power off | lens Note1 | lens Note1 | lens Note1 | lens Note1 | — | — |
lens Available | — Not Available
Note:
- Refer to On-Chip Debugger Functional Overview (PDF | English, 日本語) for the applicable MCU groups.
Isolator
Enables debugging in an environment where there is a difference in potential between the user system GND and the host PC GND.
| MCUs | ||||||
|---|---|---|---|---|---|---|
| RX | RL78 | RH850 | V850 | 78K | R8C | |
| Isolator for the E1 Emulator R0E000010ACB10 R0E000010ACB10 User's Manual (Isolator for E1 Emulator) (PDF | English, 日本語) (For the RX or the R8C family) | lens | — | — | — | — | lens |
| Isolator for the E1 Emulator R0E000010ACB20 R0E000010ACB20 User's Manual (Isolator for E1 Emulator) (PDF | English, 日本語) (For the RL78 or the RH850 family) | — | lens | lens | — | — | — |
lens Available | — Not Available
Low voltage OCD Board
Enables you to debug the target MCU, even if the adapter voltage is not high enough to reprogram internal Flash ROM. This product is used between the emulator and a user's system, and is united by the in-circuit connection with the user's system.
| MCUs | |
|---|---|
| RL78/G10 | |
| Low voltage OCD Board for RL78/G10 (10-pin/16-pin) R0E510Y47LVB00 Low voltage OCD Board for RL78/G10 (10pin, 16pin) Rev.1.00 (PDF | English, 日本語) An OCD board for debugging an RL78/G10 MCU (10-pin or 16-pin) with an adapter voltage below 4.5 V | lens |
lens Available | — Not Available
Debug MCU Board
Enables the in-circuit connection of the emulator with the user's system. This board allows you to use enhanced debugging functions. The applicable debugging function varies depending on the MCU type.
| MCUs | |
|---|---|
| RH850 | |
Debug MCU Board for RH850 Note: The package of the Debug MCU Board does not include the MCU. Please purchase it separately. For details, contact either a Renesas Electronics Corporation representative (responsible for sales) or distributor. | lens |
lens Available | — Not Available
System configuration

Design Support
E1 emulator [R0E000010KCE00] Information for Users
Information on the discontinuation of E1 emulator production and on its successor products
We have already discontinued production of the E1 emulator due to components of the product having reached their EOL (end of life, i.e. end of production). Please click on the following link to confirm the details and our successor products.
>> Tool News: [Notification] End of Life (EOL) Notice for E1 Emulator (PDF | English, 日本語)
Support
Support Communities
- An “A timeout error has occurred in emulator firmware processing (E1815001)” error occurs when programming an RX72M (100-pin) using FINE.
When using an RX72M (100-pin) and programming the microcontroller via FINE, the error “A timeout error has occurred in emulator firmware processing. (E1815001)” occurs. Current microcontroller schematic connections: 1.Pull-up (pulling high) pins: MD/FINED, RESn 2.Pull-down (pulling low) pins: XCIN, EMLE, NMI
Dec 21, 2025 - unable to connect emulater, Loading 'exrh850g3.dll' failed with 0x0
When I connect my P1MC with E2 (S/N: 2CS010559D), it shows bellow error ,how can I fix it.
Mar 20, 2025 - LPD Connection failed in RH850 but flashing through RFP
... Please check the LPD connection settings.(E1203240) And i have attached Debug tool setting FYR. So I do iterations to resolve the problem 1) Change Emulator E1with same system and its flashed and worked successfully (emulator spared) 2) I check with RFP, with the problem emulator E1 and Check its ...
Nov 23, 2023
Knowledge Base
- Emulator Serial No. Not Displaying Correctly (E2, E2 Lite, E1, and E20)
... with a specific PC. This issue can be resolved by executing the E1/E20 self-checking program V.1.01.00. Please download the E1/E20 self-checking program from here. For how to execute the E1/E20 self-checking program, download the E1/E20 Emulator ...
Mar 3, 2021 - List of know-how when using E1/E20 emulator in CS+ environment (CS+, E2, E2 Lite, E1, E20)
Helpful information for using the E1/E20 emulator in the CS+ environment is listed below.If you are facing any trouble, the FAQ portal sites for troubleshooting or error message are available. Category Suitable MCU Description FAQ NO. Target board Design/Connections RX About wiring connection during debugging ...
Apr 16, 2024 - The FAQs on using the E1/E20 emulator in the CS+ environment (CS+, E2, E2 Lite, E1, E20)
See the following FAQs. Please confirm each item of [Notes on Using the E1/E20 Emulator] on the [E1/E20 Emulator Additional Document for User's Manual], if it is "these are not helpful" or "problem is not on the list".You can download [E1/E20 Emulator ...
Jan 10, 2025