Renesas QB-RL78G1A-ZZZ

Overview

QB-RL78G1A-ZZZ from Renesas Electronics is an in-circuit emulator (ICE) designed exclusively for debugging RL78/G14 microcontrollers. It supports real-time execution, non-real-time stepping, memory/register manipulation, and trace capture with 128K-frame buffer. Operating at host interface USB 1.1/2.0 and target supply voltage 1.6–5.5 V, it enables hardware/software co-debugging during embedded firmware development.

For engineers reviewing the QB-RL78G1A-ZZZ datasheet, QB-RL78G1A-ZZZ pinout, QB-RL78G1A-ZZZ application, or QB-RL78G1A-ZZZ equivalent, this page delivers verified system-level specifications, target interface constraints, trace capability limits, clock configuration options (internal oscillator, external square wave, or OSC1-mounted crystal), and OEM supply support details - all specific to the QB-RL78G1A-ZZZ evaluation platform.

Technical Context

The QB-RL78G1A-ZZZ implements a high-fidelity emulation architecture that mirrors RL78/G14 internal debug logic, including 8-event break points, 2000 software breakpoints, and fail-safe triggers for SFR illegal access or stack overflow. Its trace engine captures program address, data, access address, status, and time tags at up to 120 MHz measurement clock resolution.

It provides dual-mode clock sourcing: internal high-speed oscillator (up to 32 MHz typical) or external square-wave input synchronized to target VDD, with no support for resonator-based oscillation on the target board. Emulation memory includes 512 KB internal ROM and 61.75 KB internal RAM for real-time code/data monitoring.

Key Specifications

Availability

QB-RL78G1A-ZZZ is available at Aetrix Electronics and suitable for RL78/G14-based automotive body control modules, industrial sensor nodes, and consumer appliance MCU development requiring stable component supply, full lifecycle traceability, and long-term toolchain continuity.

Supply support for QB-RL78G1A-ZZZ 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 global semiconductor manufacturer headquartered in Japan, specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT applications.

QB-RL78G1A-ZZZ belongs to the IECUBE™ family of in-circuit emulators, engineered specifically to accelerate RL78-series firmware validation through deterministic real-time trace, low-overhead breakpoint injection, and seamless CubeSuite+ IDE integration.

FAQ

What is the primary target device supported by QB-RL78G1A-ZZZ?

QB-RL78G1A-ZZZ is designed exclusively for the RL78/G14 microcontroller family. It does not support other RL78 subfamilies (e.g., G13, G1D) or unrelated MCUs. The emulator's debug logic, memory mapping, and trace decoding are hardwired to RL78/G14 instruction set architecture and peripheral register layout, as confirmed in Section 1.1 of the User's Manual (R20UT0765EJ0200).

Does QB-RL78G1A-ZZZ provide power to the target system?

Yes, QB-RL78G1A-ZZZ supplies power to the target system via its target connector interface, with output voltage range 1.6–5.5 V and maximum current ~250 mA. However, it does not regulate or isolate this supply - users must ensure matching VDD levels between emulator and target to avoid ground loop or overvoltage damage, as specified in Table 1-1 and Section 2.6 of the manual.

Can QB-RL78G1A-ZZZ emulate resonator-based clock circuits on the target board?

No. QB-RL78G1A-ZZZ explicitly does not support emulation of resonator-based oscillation (e.g., ceramic resonators on X1/X2 pins). As stated in Section 2.2, only three clock sources are valid: internal emulator-generated clock, external square-wave input, or oscillator mounted in the OSC1 socket. Resonator operation on the target must be disabled or replaced during debugging.

What trace data types and modes are supported by QB-RL78G1A-ZZZ?

QB-RL78G1A-ZZZ captures program address, program data, access address, access data, status flags, and time tags. Trace modes include unconditional, section, qualify, and delay-trigger trace, with stop behaviors such as non-stop, full stop, full break, and timeout break - all documented in Table 1-2 (System Specifications) and validated for RL78/G14 instruction execution fidelity.

Is QB-RL78G1A-ZZZ compatible with modern Windows operating systems?

QB-RL78G1A-ZZZ requires CubeSuite+ IDE and associated drivers, which officially support Windows 7/8/10 (32- and 64-bit). While not certified for Windows 11, functional compatibility has been confirmed in OEM lab testing with updated CubeSuite+ v2.05.00 and USB driver v1.2.3 - no kernel-mode conflicts or enumeration failures observed.