Renesas QB-20SP-EA-02T

Overview

QB-20SP-EA-02T from Renesas Electronics is an exchange adapter designed for the QB-RL78I1A in-circuit emulator, enabling physical and electrical interface conversion between the YQ connector and the 20-pin SP (Small Outline Package) target device. It supports RL78/I1A microcontroller emulation, operates within 2.7–5.5 V supply range, maintains signal integrity for high-speed debugging up to 32 MHz system clock, and is used with QB-20SP-NQ-02T target connector on user boards.

For engineers reviewing the QB-20SP-EA-02T datasheet, QB-20SP-EA-02T pinout, QB-20SP-EA-02T application, or QB-20SP-EA-02T equivalent, this adapter enables reliable debug probe interfacing for RL78/I1A-based embedded systems, supports mechanical height adjustment via optional space adapters, and ensures correct pin mapping for emulation signals including reset, clock, trace, and JTAG-like debug lines.

Technical Context

The QB-20SP-EA-02T serves exclusively as a passive mechanical and electrical translation layer between the QB-RL78I1A's YQ connector and the 20SP target package footprint. It does not contain active circuitry, ICs, or power regulation - all signals pass through with no buffering, level-shifting, or timing modification.

It is specified only for use with the RL78/I1A 20-pin SP package variant, requires mating with QB-20SP-NQ-02T target connector soldered to the user board, and must be installed with QB-20SP-YQ-01T (or compatible YQ) before plugging into the emulator base unit. No configuration, firmware, or voltage selection is involved.

Key Specifications

Availability

QB-20SP-EA-02T is available at Aetrix Electronics and suitable for RL78/I1A-based automotive body control modules, industrial sensor nodes, and consumer appliance MCU development requiring stable component supply for production-grade debug infrastructure.

Supply support for QB-20SP-EA-02T 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-20SP-EA-02T belongs to the IECUBE family of in-circuit emulators and accessories, engineered specifically to enable high-fidelity, real-time debugging of RL78-series MCUs in their native target hardware environment.

FAQ

What is the primary function of the QB-20SP-EA-02T?

The QB-20SP-EA-02T is a passive exchange adapter that physically and electrically bridges the QB-RL78I1A emulator's YQ connector to the 20-pin SP package footprint of the RL78/I1A microcontroller. It enables accurate signal routing for debug, trace, clock, and reset lines without active components or power requirements. The QB-20SP-EA-02T ensures mechanical alignment and contact reliability during real-time emulation sessions.

Is QB-20SP-EA-02T compatible with other RL78 devices beyond the I1A series?

No - QB-20SP-EA-02T is explicitly designated for the RL78/I1A in 20-pin SP package only. Table 1-3 of the QB-RL78I1A User's Manual confirms its exclusive pairing with that target device and corresponding NQ/YQ connectors. Using QB-20SP-EA-02T with other RL78 variants (e.g., 30SP, 38SP) would result in incorrect pin mapping and debug failure.

Does QB-20SP-EA-02T require firmware, configuration, or power supply?

No - QB-20SP-EA-02T is a purely passive interconnect adapter with no embedded logic, memory, or power circuitry. It draws zero current and requires no firmware update, DIP switch setting, or voltage selection. Its operation depends entirely on correct mechanical installation with QB-20SP-YQ-01T and QB-20SP-NQ-02T - the QB-20SP-EA-02T itself performs no signal conditioning.

Which connectors must be used together with QB-20SP-EA-02T?

QB-20SP-EA-02T must be used with QB-20SP-YQ-01T (YQ connector) on the emulator side and QB-20SP-NQ-02T (target connector) soldered to the user's PCB. These three components form a validated mechanical and electrical stack: YQ → QB-20SP-EA-02T → NQ. Substituting any element invalidates the signal path integrity required for RL78/I1A real-time trace and breakpoint functionality.

Can QB-20SP-EA-02T be used without a space adapter?

Yes - QB-20SP-EA-02T functions independently of space adapters. Space adapters (e.g., QB-20SP-YS-01T) are optional mechanical spacers used only when height mismatch exists between the emulator base and target board. The QB-20SP-EA-02T itself contains no height-adjustment features and relies on proper YQ/NQ clamping torque (0.054 Nm max) to maintain contact pressure regardless of board standoff.