Renesas QB-48FB-EA-05T

Overview

QB-48FB-EA-05T from Renesas Electronics is a T-type exchange adapter designed for the QB-RL78F15 in-circuit emulator to interface with RL78/F15 microcontrollers in 48-pin FB (Fine Pitch Ball Grid Array) packages. It supports high-speed system clock emulation up to 20 MHz, provides precise signal integrity for debug trace capture, and enables secure mechanical mounting between the emulator probe and target board. Used during embedded firmware development for automotive body control modules.

For engineers reviewing the QB-48FB-EA-05T datasheet, QB-48FB-EA-05T pinout, QB-48FB-EA-05T application, or QB-48FB-EA-05T equivalent, this adapter ensures reliable physical and electrical connection between the QB-RL78F15 emulator and RL78/F15-based target systems-critical for real-time execution, memory manipulation, and trace data acquisition during hardware-in-the-loop validation.

Technical Context

The QB-48FB-EA-05T is a passive mechanical and electrical interface component-not an active IC-that maps the QB-RL78F15's emulation probe signals to the 48-pin FB package footprint of the RL78/F15. It maintains signal path continuity for all debug-relevant pins including RESET, CLK, VDD, VSS, and SWD/JTAG-compatible debug I/Os.

It is used exclusively with the T-type configuration (as indicated by the "T" suffix), requiring pairing with QB-48FB-YQ-01T and QB-48FB-NQ-01T for full stack integration. No onboard logic, voltage translation, or timing compensation is provided-the adapter preserves native signal timing and voltage levels from emulator to target.

Key Specifications

Availability

QB-48FB-EA-05T is available at Aetrix Electronics and suitable for automotive ECU development, industrial motor control prototyping, and RL78-based IoT edge node validation requiring stable component supply across design, test, and small-batch production phases.

Supply support for QB-48FB-EA-05T 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, power, and SoC solutions for automotive, industrial, and enterprise applications.

The QB-48FB-EA-05T belongs to Renesas' IECUBE™ in-circuit emulator accessory product line, engineered to enable high-fidelity, low-overhead debugging of RL78-family MCUs in production-representative hardware environments.

FAQ

What is the primary function of the QB-48FB-EA-05T in the QB-RL78F15 emulation system?

The QB-48FB-EA-05T is a T-type exchange adapter that physically and electrically bridges the QB-RL78F15 in-circuit emulator to RL78/F15 microcontrollers housed in 48-pin FB packages. It ensures accurate pin mapping for debug signals-including RESET, CLK, SWCLK, SWDIO, and power rails-enabling real-time program execution, register inspection, and trace capture. The QB-48FB-EA-05T itself contains no active circuitry; its role is strictly interconnect integrity and mechanical alignment within the T-type adapter stack.

Which components must be used together with the QB-48FB-EA-05T for full system operation?

The QB-48FB-EA-05T requires three companion parts to form a functional emulation interface: QB-48FB-YQ-01T (YQ connector), QB-48FB-NQ-01T (target connector soldered to the user's PCB), and QB-48FB-YS-01T (space adapter, if height adjustment is needed). These are explicitly listed in Table 1-3 of the QB-RL78F15 User's Manual as the designated T-type adapter set for the RL78/F15 48FB package. Omitting any of these prevents proper mechanical engagement or signal continuity.

Does the QB-48FB-EA-05T support both SWD and JTAG debug interfaces?

Yes-the QB-48FB-EA-05T routes all debug-relevant pins required by the RL78/F15, which natively supports Serial Wire Debug (SWD) as its standard debug interface. While JTAG is not implemented in the RL78/F15 silicon, the QB-48FB-EA-05T's pinout includes dedicated SWCLK and SWDIO traces with matched-length routing to preserve signal integrity for high-speed debug communication up to 20 MHz. No protocol conversion or interface selection jumpers are present on the QB-48FB-EA-05T.

Can the QB-48FB-EA-05T be used with non-RL78/F15 devices in the same 48-pin FB package?

No-the QB-48FB-EA-05T is functionally and mechanically optimized exclusively for the RL78/F15 device. Its pin mapping matches the RL78/F15's specific debug signal assignment (e.g., P00–P07, P10–P17, RESET, VDD, VSS, SWCLK, SWDIO), not generic 48FB footprints. Using it with other 48-pin FB devices-even with identical package dimensions-will result in incorrect signal routing, potential damage due to voltage or pin-function mismatch, and failure to establish debug communication. Renesas does not validate or support cross-device usage.

Is the QB-48FB-EA-05T RoHS-compliant and suitable for automotive-grade designs?

Yes-the QB-48FB-EA-05T complies with the EU RoHS Directive, as confirmed in Renesas' environmental documentation referenced in Section 8 of the QB-RL78F15 User's Manual. While the adapter itself carries no quality grade designation, it is intended for use with RL78/F15 devices qualified for "Standard" applications (including automotive body electronics per Renesas' classification in Notice #5), and has been deployed in production automotive ECU development workflows. Its materials and finish meet lead-free reflow requirements for industrial and automotive PCB assembly.