Renesas UPD78F9222MC(A2)-5A4-E2-A

Overview

UPD78F9222MC(A2)-5A4-E2-A from Renesas Electronics is a 16-pin interface adapter that converts the 14-pin E1 emulator interface to the 16-pin interface used by QB-MINI2 and PG-FP5 programmers. It supports clock frequencies of 4/8/16 MHz, includes configurable jumpers JP1–JP3 for UART programming/debugging mode selection, and is mechanically designed for direct board-level connection between Renesas development tools.

For engineers reviewing the UPD78F9222MC(A2)-5A4-E2-A datasheet, UPD78F9222MC(A2)-5A4-E2-A pinout, UPD78F9222MC(A2)-5A4-E2-A application, or UPD78F9222MC(A2)-5A4-E2-A equivalent, this adapter enables interoperability across Renesas' legacy and modern programming/debugging hardware-specifically for 78K0/Kx1+, uPD78F0711/0712/0714, and related MCUs requiring mode-selectable UART routing and E1-derived clocking.

Technical Context

This adapter implements passive signal remapping between two standardized Renesas debug interfaces: it routes E1's 14-pin signals-including VDD, GND, RESET, CLK, TDI/TDO, and UART TX/RX-to the corresponding 16-pin layout used by QB-MINI2 and PG-FP5. No active logic or level-shifting circuitry is present; all connections are hardwired per the documented pin mapping.

Jumper JP2 controls UART path isolation during debugging versus flash programming, while JP3 enables/disables specific MCU-family programming modes. JP1 provides optional reset signal conditioning. The board-level pattern-cutting option allows permanent open-circuit modification of designated traces for custom signal routing.

Key Specifications

Availability

UPD78F9222MC(A2)-5A4-E2-A is available at Aetrix Electronics and suitable for embedded MCU development, Renesas 78K0-based firmware programming, and cross-toolchain debug integration requiring stable component supply and legacy-to-modern tool interoperability.

Supply support for UPD78F9222MC(A2)-5A4-E2-A 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 is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and connectivity solutions for automotive, industrial, and IoT applications.

The UPD78F9222MC(A2)-5A4-E2-A belongs to Renesas' legacy debug interface adapter product line, designed specifically to bridge E1 emulator compatibility with newer 16-pin programming tools for 78K0-series MCUs.

FAQ

What is the primary function of the UPD78F9222MC(A2)-5A4-E2-A?

The UPD78F9222MC(A2)-5A4-E2-A is a passive interface adapter that maps signals between the 14-pin E1 emulator connector and the 16-pin interface used by QB-MINI2 and PG-FP5 programmers. It enables hardware-level compatibility for debugging and flash programming of Renesas 78K0-family microcontrollers without modifying the target board or emulator hardware.

Which microcontroller families are explicitly supported by the UPD78F9222MC(A2)-5A4-E2-A?

The UPD78F9222MC(A2)-5A4-E2-A is validated for use with 78K0/Kx1+, uPD78F0711, uPD78F0712, and uPD78F0714 microcontrollers. Support is defined by jumper configurations (JP2/JP3) and clock frequency constraints-no broader 78K0-series coverage is documented or implied for this specific adapter.

How do JP2 and JP3 affect operation of the UPD78F9222MC(A2)-5A4-E2-A?

JP2 isolates the UART programming path during debugging to prevent signal contention when external UART devices are connected; it must be shorted for flash programming. JP3 must be opened during programming of uPD78F0711/0712/0714 and 78K0/Kx1+ MCUs, and shorted during debugging-ensuring correct boot-mode signaling per Renesas' specification for those devices.

Does the UPD78F9222MC(A2)-5A4-E2-A provide voltage level translation or active signal conditioning?

No-the UPD78F9222MC(A2)-5A4-E2-A contains no active components, level shifters, or buffering circuitry. It is a passive wiring adapter with fixed pin mappings and mechanical jumpers. Signal integrity and voltage compatibility depend entirely on matching the E1 emulator's output levels and the target MCU's input requirements.

Can the UPD78F9222MC(A2)-5A4-E2-A be used with non-Renesas debug tools?

No official support or validation exists for third-party debug tools. The UPD78F9222MC(A2)-5A4-E2-A is engineered exclusively for Renesas E1 emulators on the 14-pin side and QB-MINI2 or PG-FP5 programmers on the 16-pin side. Interfacing with non-Renesas tools may result in incorrect signal routing or timing violations.