Renesas QB-R5F114GG-EA-01T

Overview

QB-R5F114GG-EA-01T from Renesas Electronics is an exchange adapter designed for in-circuit debugging of RL78/F1A microcontrollers-specifically the R5F114GG, R5F114GF, R5F114GE, R5F114GD, and R5F114GC in 48-pin LQFP (FB) packages-when used with the QB-RL78F14 emulator. It enables hardware/software co-debugging, supports LIN bus emulation, provides regulated VDD output, and delivers external sensor power supply functionality.

For engineers reviewing the QB-R5F114GG-EA-01T datasheet, QB-R5F114GG-EA-01T pinout, QB-R5F114GG-EA-01T application, or QB-R5F114GG-EA-01T equivalent, this page delivers verified mechanical interface details, target device mapping, emulation role partitioning between QB-RL78F14 and R5F114GG, voltage regulation behavior, and LIN transceiver support-all confirmed from Renesas' official User's Manual R20UT2600XJ0200.

Technical Context

The QB-R5F114GG-EA-01T functions as a physical interface bridge that routes debug signals between the QB-RL78F14 emulator and target RL78/F1A devices. It integrates on-board voltage regulation (VRO), LIN bus transceiver circuitry, diagnostic output (DIAG), and protection/detection logic-all implemented via the embedded R5F114GG MCU.

Emulation responsibilities are split: the R5F114GG handles LIN communication, VDD regulation, external sensor power supply, and fault diagnostics; all other debug functions-including trace, memory access, and core control-are managed by the QB-RL78F14. VSS and GND are shorted on the adapter board, differing from standard device pin behavior.

Key Specifications

Availability

QB-R5F114GG-EA-01T is available at Aetrix Electronics and suitable for RL78/F1A-based automotive body electronics, industrial sensor nodes, and LIN-controlled actuator development requiring stable component supply and legacy emulator compatibility.

Supply support for QB-R5F114GG-EA-01T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power solutions for automotive, industrial, and IoT applications.

QB-R5F114GG-EA-01T belongs to Renesas' RL78 ecosystem tooling line, developed specifically to extend the QB-RL78F14 emulator's capability to newer RL78/F1A devices with integrated LIN and sensor power features.

FAQ

What is the primary function of the QB-R5F114GG-EA-01T?

The QB-R5F114GG-EA-01T is an exchange adapter that enables in-circuit debugging of RL78/F1A microcontrollers-including the R5F114GG, R5F114GF, R5F114GE, R5F114GD, and R5F114GC-when used with the QB-RL78F14 emulator. It implements LIN bus transceivers, voltage regulation (VRO), external sensor power supply, and diagnostic output via its onboard R5F114GG MCU. The QB-R5F114GG-EA-01T does not operate standalone and requires QB-RL78F14 for full debug functionality.

Which target devices does the QB-R5F114GG-EA-01T support?

The QB-R5F114GG-EA-01T supports five specific RL78/F1A devices: R5F114GG, R5F114GF, R5F114GE, R5F114GD, and R5F114GC-all in 48-pin LQFP (FB) package. This mapping is explicitly defined in Renesas' User's Manual R20UT2600XJ0200, Table 1-1. No other RL78 variants or packages are supported by the QB-R5F114GG-EA-01T.

Why must voltage be applied to VDD from the target system before emulation?

The QB-R5F114GG-EA-01T and QB-RL78F14 may be permanently damaged if emulation is attempted without VDD voltage supplied from the target system-this is a hard requirement stated in the official caution notice. The adapter relies on target-supplied VDD to power its internal R5F114GG and enable safe signal level translation. Applying voltage only from the emulator or external source violates the design intent and risks latch-up or overvoltage failure in both units.

How does the QB-R5F114GG-EA-01T handle ground connections?

On the QB-R5F114GG-EA-01T, VSS and GND are internally shorted-a deliberate board-level design difference from the target RL78/F1A ICs, where VSS and GND are separate pins. This simplifies signal routing but requires awareness during system integration: users must ensure the target system's ground reference aligns with this merged node to avoid ground loops or measurement errors during debugging.

What documentation is required to use the QB-R5F114GG-EA-01T correctly?

To use the QB-R5F114GG-EA-01T correctly, engineers must consult two documents: the QB-R5F114GG-EA-01T User's Manual (R20UT2600XJ0200) for adapter-specific setup, cautions, and configuration diagrams-and the QB-RL78F14 User's Manual (R20UT2058EJ) for host-side setup, USB driver installation, and debug software operation. Both manuals are mandatory; neither supersedes the other, and omission of either risks hardware damage or failed emulation.