Renesas UPD70F3834GC(R)-UEU-AX

Overview

UPD70F3834GC(R)-UEU-AX from Renesas is a 32-bit V850ES/JG3-E single-chip microcontroller with 64 KB on-chip Flash, 32 KB RAM (including 16 KB data RAM), 62 I/O lines (35 V-tolerant), 10-bit A/D converter (10 channels), Ethernet controller, USB function controller, and CAN interface. It operates at up to 50 MHz (20 ns min instruction time) across 2.85–3.6 V and targets networked industrial control and embedded gateway applications.

For engineers reviewing the UPD70F3834GC(R)-UEU-AX datasheet, UPD70F3834GC(R)-UEU-AX pinout, UPD70F3834GC(R)-UEU-AX application, or UPD70F3834GC(R)-UEU-AX equivalent, key selection criteria include its 100-pin LQFP package, integrated Ethernet PHY interface (MII/RMII), dual-channel I²C, five CSIF serial interfaces, real-time counter, and motor control timer support - all critical for deterministic networked device design.

Technical Context

The UPD70F3834GC(R)-UEU-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 operation.

Peripheral integration includes a full Ethernet MAC layer with MII/RMII interface pins (P1MDIO, P1MDC, P1COL, P1CRS, P1RXCLK–P1RXD0, P1TXCLK–P1TXD0), USB transceiver (UDMF/UDPF/UVDD), CAN controller (CRXD0/CTXD0), and four DMA channels targeting on-chip peripherals and RAM - enabling concurrent high-bandwidth data movement without CPU overhead.

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 32-bit networked microcontroller applications.

Compared with RX65N-2MB and STM32H743VI, the UPD70F3834GC(R)-UEU-AX delivers lower system-level cost and reduced PCB complexity through its integrated Ethernet MAC, CAN controller, and USB transceiver - making it optimal for space-constrained, cost-sensitive industrial gateways requiring multiple concurrent wired interfaces.

Availability

UPD70F3834GC(R)-UEU-AX is available at Aetrix Electronics and suitable for industrial Ethernet gateways, networked motor drives, and smart building controllers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant lead-free packaging.

Supply support for UPD70F3834GC(R)-UEU-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, and power management ICs for automotive, industrial, and IoT applications.

The V850ES/JG3-E product line was designed for deterministic real-time control in networked industrial equipment, integrating Ethernet, USB, CAN, and motor control peripherals into a single low-power 32-bit MCU platform.

FAQ

What is the maximum operating frequency and corresponding instruction cycle time for the UPD70F3834GC(R)-UEU-AX?

The UPD70F3834GC(R)-UEU-AX achieves a maximum system clock of 50 MHz in PLL mode, delivering a minimum instruction execution time of 20 ns. This timing is measured under conditions of 50 MHz main system clock (fXX) and is confirmed in the R01DS0029EJ0001 datasheet revision 0.01, page 1. The CPU executes most instructions in a single clock cycle due to its one-clock-pitch architecture.

Does the UPD70F3834GC(R)-UEU-AX include an integrated Ethernet PHY or only the MAC layer?

The UPD70F3834GC(R)-UEU-AX integrates only the Ethernet MAC layer, not the physical layer (PHY). It provides MII and RMII interface pins (e.g., P1MDIO, P1MDC, P1RXD0–P1RXD3, P1TXD0–P1TXD3) that require connection to an external 10/100 Mbps Ethernet PHY IC. This is explicitly stated in the "Ethernet controller" feature list and internal block diagram on page 13 of R01DS0029EJ0001.

How many analog input channels does the UPD70F3834GC(R)-UEU-AX support, and what is their resolution?

The UPD70F3834GC(R)-UEU-AX supports ten 10-bit analog input channels (ANI0–ANI9), as confirmed in the V850ES/JG3-E function list on page 4 of R01DS0029EJ0001. These channels are accessible via Port 7 pins (P70–P79) and are compatible with the on-chip A/D converter's 10-bit resolution and sample-and-hold circuitry.

Is the UPD70F3834GC(R)-UEU-AX pin-compatible with other members of the V850ES/JG3-E family, such as UPD70F3835GC-UEU-AX?

Yes - all V850ES/JG3-E variants sharing the "GC-UEU-AX" suffix (including UPD70F3834GC(R)-UEU-AX, UPD70F3835GC-UEU-AX, UPD70F3836GC-UEU-AX, and UPD70F3837GC-UEU-AX) use identical 100-pin LQFP packaging and pinout. Differences are limited to internal memory size (Flash/RAM) and are electrically transparent at the package level, per the ordering information table on page 5 of R01DS0029EJ0001.

What debug interface does the UPD70F3834GC(R)-UEU-AX support, and is external hardware required?

The UPD70F3834GC(R)-UEU-AX supports Renesas MINICUBE2 on-chip debugging via dedicated debug pins (DDI, DDO, DCK, DRST, DMS), as specified in the function lists on pages 2–4 and the pin identification section on page 10 of R01DS0029EJ0001. No external debug probe beyond the MINICUBE2 unit is required - the MCU handles JTAG protocol internally.