Renesas UPD70F3828GB(R)-GAH-AX

Overview

UPD70F3828GB(R)-GAH-AX from Renesas is a 32-bit V850ES/JE3-E single-chip microcontroller with 256 KB on-chip Flash, 48 KB RAM (including 16 KB data RAM), 26 I/O lines, 10-bit A/D converter (10 channels), Ethernet controller, USB function controller, and DMA controller. It operates at up to 50 MHz (20 ns instruction cycle) and targets embedded networking applications requiring real-time control and connectivity.

For engineers reviewing the UPD70F3828GB(R)-GAH-AX datasheet, UPD70F3828GB(R)-GAH-AX pinout, UPD70F3828GB(R)-GAH-AX application, or UPD70F3828GB(R)-GAH-AX equivalent, key selection criteria include its 64-pin LQFP package, Ethernet + USB integration, 256 KB Flash/48 KB RAM memory configuration, CAN absence (confirmed for JE3-E family except μPD70F3829), and support for HALT/IDLE/STOP power-save modes.

Technical Context

The UPD70F3828GB(R)-GAH-AX implements the V850ES/JE3-E CPU core with 32-bit barrel shifter, hardware 16×16→32 multiplier, saturation arithmetic, and bit manipulation instructions. Its real-time responsiveness stems from one-clock-pitch execution and dedicated peripheral controllers including a 5-channel 16-bit timer/event counter AA (TAA) and 4-channel 16-bit interval timer M (TMM).

It integrates a full Ethernet MAC layer (10/100 Mbps), USB 2.0 function controller (full-speed), and dual I²C interfaces - all managed via a 4-channel DMA controller that supports transfers between on-chip peripherals and internal RAM. Clock generation includes PLL mode (fXX = 24–50 MHz from 3–6.25 MHz fX) and subclock (32.768 kHz) for RTC.

Key Specifications

Pinout & Package

Package: 64-pin plastic LQFP (fine pitch, 10 × 10 mm). Pin functions conform to V850ES/JE3-E specification; pin assignments validated per R01DS0029EJ0001 Rev.0.01 Page 6.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD70F3828GB(R)-GAH-AX, UPD70F3829GB(R)-GAH-AX adds CAN but shares identical Ethernet/USB/I²C capabilities and package, while R5F566TEADFP trades integrated Ethernet for enhanced motor control peripherals and lower memory density - making UPD70F3828GB(R)-GAH-AX optimal for fixed-function Ethernet+USB edge nodes.

Availability

UPD70F3828GB(R)-GAH-AX is available at Aetrix Electronics and suitable for industrial Ethernet gateways, USB peripheral controllers, and networked audio systems requiring stable component supply and long-term manufacturability.

Supply support for UPD70F3828GB(R)-GAH-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 specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.

The V850ES/JE3-E product line delivers cost-optimized 32-bit MCUs targeting embedded networking applications with integrated Ethernet MAC, USB, and real-time peripherals - designed for deterministic control in resource-constrained edge nodes.

FAQ

What is the maximum operating frequency of the UPD70F3828GB(R)-GAH-AX?

The UPD70F3828GB(R)-GAH-AX achieves a maximum system clock frequency of 50 MHz in PLL mode, delivering a minimum instruction execution time of 20 ns. This is enabled by a PLL that multiplies the 3–6.25 MHz main crystal input by 8. The core maintains one-clock-pitch execution across most instructions, ensuring predictable real-time behavior critical for Ethernet packet processing and USB transaction scheduling in the UPD70F3828GB(R)-GAH-AX.

Does the UPD70F3828GB(R)-GAH-AX include a CAN controller?

No, the UPD70F3828GB(R)-GAH-AX does not include a CAN controller. According to the official Renesas datasheet R01DS0029EJ0001 Rev.0.01, CAN functionality is exclusive to μPD70F3829 (JE3-E), μPD70F3833 (JF3-E), and μPD70F3837 (JG3-E) within this family. The UPD70F3828GB(R)-GAH-AX retains full Ethernet, USB, dual I²C, and 10-channel A/D capabilities - making it ideal for applications where CAN is unnecessary but wired networking and USB device functionality are essential.

What package type and pin count does the UPD70F3828GB(R)-GAH-AX use?

The UPD70F3828GB(R)-GAH-AX uses a 64-pin plastic LQFP (fine pitch) package measuring 10 × 10 mm. This is explicitly confirmed in the Ordering Information table on page 5 of R01DS0029EJ0001 Rev.0.01. The pinout matches the V850ES/JE3-E variant and includes dedicated MII Ethernet signals (P1RXD0–P1RXD3, P1TXD0–P1TXD3), USB differential pair (UDMF/UDPF), and analog inputs (ANI0–ANI9). No other package variants (e.g., WQFN or LQFP-80) are assigned to this specific part number.

How much on-chip Flash and RAM does the UPD70F3828GB(R)-GAH-AX provide?

The UPD70F3828GB(R)-GAH-AX integrates 256 KB of on-chip Flash memory and 48 KB of on-chip RAM. Of the RAM, 16 KB is designated as data RAM - a fixed allocation confirmed in the JE3-E Function List (page 2). This memory configuration supports complex protocol stacks (e.g., TCP/IP, USB CDC) while retaining sufficient space for application code and real-time data buffers in the UPD70F3828GB(R)-GAH-AX.

What power supply voltage range is supported by the UPD70F3828GB(R)-GAH-AX?

The UPD70F3828GB(R)-GAH-AX operates from a single 2.85 V to 3.6 V supply, as specified in the Electrical Characteristics section of R01DS0029EJ0001 Rev.0.01. This voltage range applies to both digital (VDD) and analog (AVDD, EVDD, UVDD) domains, with dedicated ground pins (VSS, AVSS, EVSS) for noise isolation. The UPD70F3828GB(R)-GAH-AX also includes an on-chip regulator controlled via the REGC pin, requiring a 4.7 µF capacitor to VSS per datasheet recommendation.