Renesas QB-RL78I1B-ZZZ

Overview

QB-RL78I1B-ZZZ from Renesas Electronics is an in-circuit emulator (ICE) designed exclusively for debugging RL78/I1B microcontroller-based systems. It supports real-time execution, non-real-time stepping, memory/register manipulation, trace capture (128K frames), and fail-safe break functions including SFR illegal access and stack overflow detection. It interfaces via USB 1.1/2.0 to Windows PCs and supplies target power at 1.6–5.5 V.

For engineers reviewing the QB-RL78I1B-ZZZ datasheet, QB-RL78I1B-ZZZ pinout, QB-RL78I1B-ZZZ application, or QB-RL78I1B-ZZZ equivalent, this page delivers verified hardware specifications, system-level debug capabilities, target interface requirements, clock configuration options (internal oscillator, external square wave, or OSC1-mounted crystal), and OEM supply support - all specific to RL78/I1B emulation.

Technical Context

The QB-RL78I1B-ZZZ implements a full-featured ICE architecture with dual-mode execution control: real-time functions (Go, Start from Here, Restart) and non-real-time functions (Step In, Next Over, Slowmotion). Its trace engine captures program address/data, access address/data, status, and time tags across unconditional, section, qualify, and delay-trigger modes.

It provides 512 KB internal ROM and 61.75 KB internal RAM for emulation firmware and data storage, with a 120 MHz measurement clock enabling 8 ns timing resolution. Breakpoint resources include 8 execution/access event points, 2000 software breakpoints, and 4 pre-execution breakpoints - all configurable per RL78/I1B memory map and peripheral register layout.

Key Specifications

Availability

QB-RL78I1B-ZZZ is available at Aetrix Electronics and suitable for RL78/I1B-based automotive body control modules, industrial sensor nodes, and consumer appliance MCU development requiring stable component supply, long-term tool continuity, and certified debug infrastructure.

Supply support for QB-RL78I1B-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.

The QB-RL78I1B-ZZZ belongs to Renesas' IECUBE family of high-performance in-circuit emulators, engineered specifically to provide full-cycle, low-overhead debugging for RL78-series MCUs - emphasizing real-time trace, fail-safe breakpointing, and seamless integration with CubeSuite+ IDE.

FAQ

What is the primary target device supported by QB-RL78I1B-ZZZ?

QB-RL78I1B-ZZZ is designed exclusively for the RL78/I1B microcontroller family. It provides full hardware-level emulation including instruction trace, register visibility, and peripheral register access aligned to the RL78/I1B architecture. Unlike generic debuggers, QB-RL78I1B-ZZZ leverages dedicated firmware and signal conditioning optimized for RL78/I1B's on-chip debug interface, ensuring cycle-accurate behavior and reliable breakpoint placement across all memory regions and SFRs.

Does QB-RL78I1B-ZZZ support real-time trace functionality?

Yes, QB-RL78I1B-ZZZ supports real-time trace with 128K frame capacity and 120 MHz measurement clock. It captures program address, program data, access address, access data, status flags, and time tags in unconditional, section, qualify, and delay-trigger modes. This enables deterministic analysis of interrupt response times, bus contention, and protocol timing - critical for validating real-time performance in RL78/I1B-based motor control or communication firmware.

Can QB-RL78I1B-ZZZ supply power to the target system?

Yes, QB-RL78I1B-ZZZ supplies regulated power to the target system within the 1.6–5.5 V range, matching the RL78/I1B's operational voltage window. The green TARGET LED indicates active target power delivery. This eliminates external power supply dependency during early-stage board bring-up and ensures consistent voltage conditions between debug and final operation - reducing noise-induced instability during trace capture.

What clock configuration options does QB-RL78I1B-ZZZ offer for RL78/I1B debugging?

QB-RL78I1B-ZZZ supports three clock sources: (a) internally generated clock (configurable frequency), (b) external square-wave input from the target system (X2 pin), or (c) oscillator mounted in the OSC1 socket. All options are validated for RL78/I1B timing compliance, with no resonator-based oscillation support - ensuring deterministic clock injection and eliminating startup variability during reset and initialization debugging.

Is QB-RL78I1B-ZZZ compatible with CubeSuite+ IDE?

Yes, QB-RL78I1B-ZZZ is fully integrated with Renesas CubeSuite+ IDE as its native debug interface. It enables seamless setup of breakpoints, watch windows, stack trace, local/global variable inspection, and flash programming directly from the IDE. CubeSuite+ handles all low-level communication, configuration, and trace decoding - allowing engineers to focus on firmware logic rather than debug infrastructure setup when using QB-RL78I1B-ZZZ.