• SEGGER RL78 14-Pin Programming Adapter (8.06.20)
  • SEGGER RL78 14-Pin Programming Adapter (8.06.20), view 2
  • SEGGER RL78 14-Pin Programming Adapter (8.06.20), view 3
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SEGGER Microcontroller GmbH

SEGGER RL78 14-Pin Programming Adapter (8.06.20)

SEGGER RL78 14-Pin Programming Adapter (8.06.20)
Converts 20-pin J-Link connector to 14-pin Renesas E1 connector for RL78 flash programming.

SKU: 8.06.20

£72.00 inc VAT
£60.00 exc VAT
£72.00 inc VAT
£60.00 exc VAT
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  • SEGGER RL78 14-Pin Programming Adapter (8.06.20)
  • SEGGER RL78 14-Pin Programming Adapter (8.06.20), view 2
  • SEGGER RL78 14-Pin Programming Adapter (8.06.20), view 3

Key Features

Converts 20-pin Flasher to 14-pin E1 connector
Supports entire RL78 microcontroller family
Jumper-selectable 3.3V or 5V target supply
Integrated TOOL0 pull-up capability
Flash programming only
Includes 14-pin ribbon cable
Production-grade reliability

Overview

The SEGGER RL78 14-Pin Programming Adapter (8.06.20) provides the essential interface between SEGGER Flasher programming tools and Renesas RL78 microcontroller targets. This compact adapter converts the standard 20-pin 0.1" connector to the Renesas-defined 14-pin E1 connector, supporting comprehensive flash programming across the extensive RL78 family including G, F, D, I, and L series devices.
Features jumper-selectable 3.3V or 5V target supply and includes integrated TOOL0 pull-up capability.
The adapter includes a 14-pin ribbon cable and supports optional target power supply via the VTREF connection. Compatible with all SEGGER Flasher programming tools, this adapter ensures reliable production-grade flash programming for RL78-based designs.
Related Products: SEGGER Flasher PRO | SEGGER Flasher Compact

Downloads

Why Engineers Choose the SEGGER RL78 14-Pin Programming Adapter (8.06.20)

Production Programming

Enables reliable high-volume flash programming of RL78 microcontrollers in manufacturing environments

Universal RL78 Support

Single adapter supports entire RL78 family eliminating need for multiple interface solutions

Flexible Power Options

Jumper-selectable voltage and optional target supply simplifies setup across different designs

Convert Standard J-Link to Renesas E1 Connector

The SEGGER RL78 14-Pin Programming Adapter seamlessly converts the standard 20-pin 0.1" J-Link connector to the Renesas-defined 14-pin E1 connector, enabling efficient flash programming of RL78 microcontrollers. This essential adapter bridges the gap between SEGGER's Flasher programming tools and Renesas RL78 target hardware.

Supported RL78 Microcontroller Cores

Family Supported Cores
RL78/D Series RL78/D1A
RL78/F Series RL78/F12, RL78/F13, RL78/F14, RL78/F15
RL78/G Series RL78/G10, RL78/G11, RL78/G12, RL78/G13, RL78/G14
RL78/G1 Series RL78/G1A, RL78/G1C, RL78/G1D, RL78/G1E, RL78/G1F, RL78/G1G, RL78/G1H
RL78/I Series RL78/I1A, RL78/I1B, RL78/I1C, RL78/I1D, RL78/I1E
RL78/L Series RL78/L12, RL78/L13, RL78/L1A, RL78/L1C

Selectable Target Supply Voltage

The adapter provides flexible power options with jumper-selectable 3.3V or 5V supply voltage. When the supply option is jumpered, the target is powered via the VTREF connection, eliminating the need for external power during programming operations.
Important: This adapter is exclusively for flash programming. It cannot be used with J-Link debug probes and does not support debugging functionality for RL78 devices.

Wiring Quick-Start

Essential Connections

14-pin E1 connector pinout diagram
 Pin 1: GND Pin 2: GND Pin 3: VDD Pin 4: RSTPU (Pull-up resistor for reset) Pin 5: TOOL0 (Bidirectional data line) Pin 6: RESET_IN Pin 8: VSS Pin 10: RESET_OUT Pin 12: GND Pin 13: RESET_OUT Pin 14: GND

TOOL0 Pull-up Configuration

RL78 devices use open-drain TOOL0 pins requiring external pull-up resistors. While evaluation boards typically include these resistors, the adapter features an additional solder bridge between VTREF and TOOL0 to accommodate targets without built-in pull-ups.
Recommended pull-up resistance: 1kΩ to VTREF

Programming Interface Specifications

Parameter Specification
Input Connector 20-pin 0.1" standard (J-Link compatible)
Output Connector 14-pin E1 connector (Renesas standard)
Supply Voltage 3.3V or 5V (jumper selectable)
Communication Protocol Single-line UART via TOOL0
Target Current Up to 500mA
For J-Link debug functionality, use SEGGER's standard J-Link adapters. This RL78 adapter is specifically designed for production flash programming with Flasher tools.
Engineer Q&A

Questions and Answers

10 questions
  • Can This Adapter Power My Target Board During Programming?

    Yes, when the supply jumper is configured, the adapter can provide either 3.3V or 5V to power the target via the VTREF connection. SEGGER publishes no current rating for the adapter; the Flasher's own target supply limit applies (Flasher PRO: up to 400mA at 5V).

    Answered by John LeggUpdated 12 Oct 2026
  • Is This Adapter Compatible with All SEGGER Flasher Models?

    No. It works with the Flasher models SEGGER lists: Flasher PRO, Flasher PRO XL, Flasher Compact and Flasher Portable PLUS.

    SEGGER Flasher PRO In-System Flash Programmer 5.17.01 SEGGER Flasher PRO In-System Flash Programmer 5.17.01
    £1,100.00     SEGGER Flasher Compact In-Circuit Programmer SEGGER Flasher Compact In-Circuit Programmer
    £920.00
    Answered by John LeggUpdated 12 Oct 2026
  • What Programming Protocols Does the Adapter Support?

    The adapter uses the RL78 TOOL0 programming pin and is for flash programming.

    Answered by John LeggUpdated 12 Oct 2026
  • Can I Use This Adapter for In-Circuit Programming?

    Yes, this adapter is designed for in-circuit programming applications. It allows programming of RL78 devices that are already soldered onto target PCBs through the 14-pin E1 connector interface.

    Answered by John LeggUpdated 12 Oct 2026
  • How Do I Connect This Adapter to My Programming Setup?

    To connect the adapter:

    1. Connect the 20-pin connector to your SEGGER Flasher.
    2. Connect the 14-pin ribbon cable to your target board's E1 connector.
    3. Set the voltage selection jumper as needed.
    4. Make sure the ground connections are sound.
    Answered by John LeggUpdated 12 Oct 2026
  • What RL78 Microcontrollers Does This Adapter Support?

    The adapter supports the RL78 series SEGGER lists: D1A; F12, F13, F14, F15; G10, G11, G12, G13, G14; G1A, G1C, G1D, G1E, G1F, G1G, G1H; I1A, I1B, I1C, I1D, I1E; L12, L13, L1A, L1C. The connector is the standard 14-pin E1 header defined by Renesas.

    Answered by John LeggUpdated 12 Oct 2026
  • How Do I Select Between 3.3V and 5V Target Supply Voltage?

    The adapter features a jumper that allows selection between 3.3V and 5V supply voltage. When the supply option is jumpered, the target receives power via the VTREF connection. Remove the jumper if your target has independent power supply.

    Answered by John LeggUpdated 12 Oct 2026
  • Do I Need External Pull-Up Resistors for the TOOL0 Line?

    RL78 devices need pull-up resistors on the TOOL0 line. Most evaluation boards include them, and for targets without built-in pull-ups the adapter also provides a solder bridge between VTREF and TOOL0.

    Answered by John LeggUpdated 12 Oct 2026
  • Does the Adapter Come with a Cable?

    SEGGER's product photo shows a 14-pin ribbon cable; delivery contents are not listed on segger.com.

    Answered by John LeggUpdated 12 Oct 2026

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