Renesas UPD70F3426GJ(A)-GAE-AX

Overview

UPD70F3426GJ(A)-GAE-AX from Renesas Electronics is a 32-bit V850E/DJ3 single-chip microcontroller designed for automotive body and dashboard control. It integrates 2 MB flash, 84 KB RAM, CAN 2.0B interface (2 channels), 12-channel 10-bit ADC, and dedicated 6-channel stepper motor drivers. It operates from 3.2 V to 5.5 V and supports full functionality at 4.0–5.5 V via on-chip power-on clear.

For engineers reviewing the UPD70F3426GJ(A)-GAE-AX datasheet, UPD70F3426GJ(A)-GAE-AX pinout, UPD70F3426GJ(A)-GAE-AX application, or UPD70F3426GJ(A)-GAE-AX equivalent, key selection considerations include its 144-pin QFP package, V850E RISC core with 64 MHz max CPU clock, integrated LCD interface, and automotive-grade peripheral set including dual CAN, UARTA, CSIB, and I²C.

Technical Context

The UPD70F3426GJ(A)-GAE-AX implements the V850E RISC CPU core with 5-stage pipeline and compact instruction encoding. Its memory subsystem includes 2 MB flash (upper 1 MB connected to VSB bus with 2-cycle consecutive/4-cycle random access) and 84 KB RAM (upper 24 KB on VSB bus with 2-cycle access).

Peripheral integration includes two independent CAN controllers compliant with ISO 11898-1, a 12-channel 10-bit ADC with sample-and-hold, six dedicated stepper motor driver outputs with current-limiting I/O buffers, and full LCD interface supporting up to 40×4 segments - all operating within the specified 3.2–5.5 V supply range.

Key Specifications

Pinout & Package

The UPD70F3426GJ(A)-GAE-AX is housed in a 144-pin plastic quad flat package (QFP) with 0.5 mm pitch, compliant with JEDEC MS-026. Thermal resistance θ_JA is 30 °C/W (typical) under standard JEDEC test conditions.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit automotive microcontroller applications.

Compared with R5F566TEADFP and MB9B560RPMC, the UPD70F3426GJ(A)-GAE-AX uniquely combines 2 MB flash, dual CAN 2.0B, and 6-channel hardware stepper control in a single 144-pin QFP - eliminating external driver ICs and reducing BOM count for cost-sensitive automotive body applications.

Availability

UPD70F3426GJ(A)-GAE-AX is available at Aetrix Electronics and suitable for automotive instrument clusters, body control modules, and HVAC actuator systems requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.

Supply support for UPD70F3426GJ(A)-GAE-AX 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 markets.

The UPD70F3426GJ(A)-GAE-AX belongs to the V850E/DJ3 product line, engineered specifically for cost-optimized automotive body electronics where integration of CAN, stepper control, and LCD interface reduces system complexity and improves ASIL-B readiness.

FAQ

What is the maximum operating frequency of the UPD70F3426GJ(A)-GAE-AX CPU core?

The UPD70F3426GJ(A)-GAE-AX features the V850E RISC CPU core with a maximum operating frequency of 64 MHz under standard conditions. This frequency is achievable when the main oscillator is configured for high-speed operation and the device is powered within its specified 4.0–5.5 V operating range. The core maintains deterministic timing across all instructions, enabling precise real-time control in automotive applications.

Does the UPD70F3426GJ(A)-GAE-AX support CAN FD or only classical CAN 2.0B?

The UPD70F3426GJ(A)-GAE-AX supports only CAN 2.0B protocol compliance per ISO 11898-1, with two independent CAN controllers. It does not implement CAN FD features such as flexible data-rate or extended payload length. For CAN FD requirements, designers should consider Renesas' RX or RA families. The UPD70F3426GJ(A)-GAE-AX's dual CAN 2.0B interfaces remain fully compatible with legacy automotive networks.

How many analog input channels are accessible on the UPD70F3426GJ(A)-GAE-AX?

UPD70F3426GJ(A)-GAE-AX provides 13 accessible analog input channels (AIN0 through AIN12), as confirmed in the device-specific pin configuration (Figure 2-2) and General Characteristics chapter. While the family datasheet lists up to 16 channels (AIN0–AIN15), AIN13–AIN15 are reserved for higher-pin-count variants like µPD70F3427 and are not bonded out on the 144-pin GJ package used by UPD70F3426GJ(A)-GAE-AX.

Is external memory interface supported on the UPD70F3426GJ(A)-GAE-AX?

No, the UPD70F3426GJ(A)-GAE-AX does not support external memory interface. That feature is exclusive to the µPD70F3427 variant (208-pin GD package), as explicitly stated in Chapter 1 Overview and Chapter 11 Package. The UPD70F3426GJ(A)-GAE-AX relies solely on its integrated 2 MB flash and 84 KB RAM, with no address/data bus pins or associated control signals (e.g., RD, WR, CS0–CS4, WAIT) assigned in its 144-pin pinout.

What is the function of the FLMD0 and FLMD1 pins on the UPD70F3426GJ(A)-GAE-AX?

FLMD0 and FLMD1 are mode-select pins that determine boot configuration and debug interface behavior at power-on reset. Their logic levels define whether the UPD70F3426GJ(A)-GAE-AX boots from internal flash, enters on-chip debug mode, or configures alternate vector tables. These pins must be externally pulled high or low per the required startup mode - floating states are undefined and may cause unpredictable boot behavior. Their function is documented in Section 6.3 (Pin group 2: RESET and FLMD0) and Chapter 1 Overview.