Renesas UPD70F3778GF-GAT-AX

Overview

UPD70F3778GF-GAT-AX from Renesas is a 32-bit V850ES/JG3-E single-chip microcontroller with 256 KB on-chip Flash, 48 KB RAM (including 16 KB data RAM), 62 I/O lines (35 V-tolerant), Ethernet controller, USB function controller, 10-bit A/D converter (10 channels), CAN interface, and real-time counter. It operates at 50 MHz (20 ns instruction cycle) across −40 to +85°C for industrial networked devices.

For engineers reviewing the UPD70F3778GF-GAT-AX datasheet, UPD70F3778GF-GAT-AX pinout, UPD70F3778GF-GAT-AX application, or UPD70F3778GF-GAT-AX equivalent, key selection criteria include its 100-pin LQFP package, integrated Ethernet PHY interface (MII), CAN 2.0B support, and dual I²C/CSIF/UARTC serial channel count - critical for deterministic industrial communication stacks.

Technical Context

The UPD70F3778GF-GAT-AX implements the V850ES architecture with 32×32-bit general-purpose registers, hardware 16×16→32-bit multiplier, saturation arithmetic, and bit manipulation instructions. Its clock system supports PLL mode (fXX = 24–50 MHz from 3–6.25 MHz fX) and subclock (32.768 kHz) for RTC.

It integrates a full Ethernet MAC+PHY MII interface (P1MDIO/P1MDC/P1COL/P1CRS/P1RXD0–3/P1TXD0–3), one CAN channel (CRXD0/CTXD0), four UARTC channels, three CSIF channels, three I²C channels, and DMA-driven peripheral access - enabling concurrent high-bandwidth wired connectivity.

Key Specifications

Pinout & Package

Package: 100-pin plastic LQFP (fine pitch, 14 × 14 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD70F3837GC-UEU-AX and UPD70F3836GC-UEU-AX, UPD70F3778GF-GAT-AX delivers identical real-time Ethernet/CAN co-processing capability in the same 100-pin LQFP footprint, enabling drop-in replacement without PCB or firmware changes in industrial control designs.

Availability

UPD70F3778GF-GAT-AX is available at Aetrix Electronics and suitable for industrial Ethernet gateways, automated test equipment, building management systems, and medical diagnostic interfaces requiring stable component supply and long-term lifecycle support.

Supply support for UPD70F3778GF-GAT-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 is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The V850ES/JG3-E product line targets deterministic real-time control in networked industrial equipment, integrating Ethernet, CAN, USB, and high-resolution A/D within a single low-power 32-bit MCU die.

FAQ

What is the maximum operating frequency of the UPD70F3778GF-GAT-AX?

The UPD70F3778GF-GAT-AX achieves a maximum system clock of 50 MHz using its on-chip PLL, resulting in a minimum instruction execution time of 20 ns. This frequency is sustained across the full −40 to +85°C operating temperature range with supply voltage between 2.85 V and 3.6 V, enabling deterministic real-time response in industrial control loops.

Does the UPD70F3778GF-GAT-AX include an integrated Ethernet PHY?

No, the UPD70F3778GF-GAT-AX integrates only the Ethernet MAC and MII interface logic. External PHY ICs (e.g., LAN8720A) must be connected to P1MDIO, P1MDC, P1RXD0–3, P1TXD0–3, P1COL, and P1CRS pins. The MCU does not contain analog PHY circuitry - it requires a companion 10/100BASE-TX PHY for physical layer signaling.

How many CAN channels does the UPD70F3778GF-GAT-AX support?

The UPD70F3778GF-GAT-AX supports exactly one CAN 2.0B-compliant controller, accessible via dedicated CRXD0 (CAN Receive Data) and CTXD0 (CAN Transmit Data) pins. This single-channel implementation is confirmed in the V850ES/JG3-E function list and internal block diagram, with no provision for additional CAN controllers in this variant.

What debug interface does the UPD70F3778GF-GAT-AX use?

The UPD70F3778GF-GAT-AX uses the standard Renesas MINICUBE2 debug interface, implemented through four dedicated pins: DDI (Debug Data Input), DDO (Debug Data Output), DCK (Debug Clock), and DRST (Debug Reset). These signals connect directly to MINICUBE2 hardware for full JTAG-style on-chip debugging, flash programming, and real-time trace without requiring SWD or proprietary adapters.

Is the UPD70F3778GF-GAT-AX pin-compatible with other V850ES/JG3-E MCUs?

Yes, the UPD70F3778GF-GAT-AX shares identical 100-pin LQFP packaging, pin assignment, and electrical characteristics with all V850ES/JG3-E variants including UPD70F3834GC-UEU-AX through UPD70F3837GC-UEU-AX. Pin functions, power domains, and peripheral mappings are consistent across the family, allowing firmware reuse and layout compatibility when migrating between Flash/RAM configurations.