Renesas UPD70F3478AGJA-GAE-G

Overview

UPD70F3478AGJA-GAE-G from Renesas Electronics is a 32-bit V850E/SJ3-H microcontroller featuring a 64 MHz CPU clock, 512 KB on-chip Flash memory, 48 KB RAM, and integrated peripherals including 32-bit timer arrays, UART, I²C, CAN 2.0B controller, and 12-bit ADC with 24 channels. It targets real-time control in industrial automation and motor drive systems requiring deterministic interrupt response and robust peripheral integration.

For engineers reviewing the UPD70F3478AGJA-GAE-G datasheet, UPD70F3478AGJA-GAE-G pinout, UPD70F3478AGJA-GAE-G application, or UPD70F3478AGJA-GAE-G equivalent, key selection criteria include its V850E core instruction compatibility, 100-pin LQFP package with dedicated CAN/ADC/UART routing, Flash programming via on-chip debug interface, and support for automotive-grade temperature range (−40°C to +125°C) per AEC-Q100 Class 2 qualification.

Technical Context

The UPD70F3478AGJA-GAE-G implements the V850E/SJ3-H architecture with a 5-stage pipeline, supporting both little-endian and big-endian data access. It integrates a programmable interrupt controller with 128 vector entries, priority-based nesting, and latency as low as 5 cycles for highest-priority interrupts.

Its peripheral subsystem includes dual CAN controllers compliant with ISO 11898-1:2003, a 12-bit ADC with sample-and-hold and hardware-triggered conversion sequencing, and a 32-bit multi-function timer unit capable of PWM generation, input capture, and quadrature encoder interface - all synchronized to a common clock domain for deterministic timing coordination.

Key Specifications

Pinout & Package

UPD70F3478AGJA-GAE-G is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with an exposed thermal pad for enhanced heat dissipation in high-duty-cycle motor control applications. Pin assignments follow the V850E/SJ3-H standard layout with dedicated power/ground pairs, separate analog/digital supply domains, and grouped peripheral signals for noise isolation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with UPD70F3478AGJA-GAE-G, R5F566TEADFP offers higher computational headroom and modern toolchain support, while UPD70F3476AGJA-GAE-G delivers identical mechanical and electrical compatibility at lower memory capacity - enabling tiered product families with shared hardware design.

Availability

UPD70F3478AGJA-GAE-G is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and medical infusion pump applications requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant reliability.

Supply support for UPD70F3478AGJA-GAE-G 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 leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The V850E/SJ3-H product line delivers high-reliability 32-bit MCUs optimized for real-time control in harsh environments, with emphasis on deterministic timing, functional safety readiness, and long-lifecycle support for automotive and industrial customers.

FAQ

What is the maximum operating frequency of the UPD70F3478AGJA-GAE-G?

The UPD70F3478AGJA-GAE-G operates at a maximum CPU clock frequency of 64 MHz, achieved via internal PLL multiplication of an external 1–20 MHz crystal or clock source. This frequency is guaranteed across the full −40°C to +125°C temperature range and 2.7 V to 5.5 V supply voltage, as validated in Renesas Hardware Manual Chapter 35 Electrical Specifications.

Does the UPD70F3478AGJA-GAE-G support CAN FD?

No, the UPD70F3478AGJA-GAE-G integrates two CAN 2.0B controllers compliant with ISO 11898-1:2003, supporting up to 1 Mbps classical CAN only. It does not implement CAN FD protocol features such as flexible data-rate or extended data length. For CAN FD requirements, consider Renesas RA6T2 or RH850/F1L series devices.

What debug interfaces are supported by the UPD70F3478AGJA-GAE-G?

The UPD70F3478AGJA-GAE-G supports IEEE 1149.1 JTAG interface for boundary scan, flash programming, and real-time on-chip debugging using Renesas E1 or MINICUBE2 emulators. It does not support SWD or serial wire debug. The TCK/TDO/TDI/TMS pins are dedicated and require no configuration to enable debug access.

Is the UPD70F3478AGJA-GAE-G qualified for automotive applications?

Yes, the UPD70F3478AGJA-GAE-G is qualified per AEC-Q100 Grade 2 (−40°C to +125°C), with full reliability testing including HTOL, TC, and ESD. Its datasheet specifies automotive-grade electrical characteristics and failure-in-time (FIT) rates. Renesas documentation confirms suitability for body electronics, chassis, and powertrain auxiliary control - excluding safety-critical ASIL-D functions without additional system-level certification.

How is Flash memory protected against accidental overwrite in the UPD70F3478AGJA-GAE-G?

The UPD70F3478AGJA-GAE-G implements multiple Flash protection mechanisms: sector lock bits prevent write/erase of designated 2 KB blocks, a write-enable sequence requires three consecutive writes to unlock registers, and ECC circuitry detects and corrects single-bit errors during read operations. These features are configured via the Flash control register (FCTL) and enforced in hardware without CPU intervention.