Renesas UPD70F3820GB-GAH-AX

Overview

UPD70F3820GB-GAH-AX from Renesas Electronics is a 32-bit V850ES/JG3-H microcontroller with 512 KB on-chip Flash, 64 KB RAM, and integrated 16-bit timer/event counters, UART, I²C, and CAN 2.0B controller - used in industrial motor control and factory automation systems requiring deterministic real-time response.

For engineers reviewing the UPD70F3820GB-GAH-AX datasheet, UPD70F3820GB-GAH-AX pinout, UPD70F3820GB-GAH-AX application, or UPD70F3820GB-GAH-AX equivalent, key selection criteria include its 48 MHz max CPU frequency, 3.3 V operation, 100-pin LQFP package, CAN interface compliance, and support for on-chip debug via JTAG.

Technical Context

The UPD70F3820GB-GAH-AX implements the V850ES core with 5-stage pipeline, supports both little-endian and big-endian data access, and integrates a PLL-based clock generation unit enabling stable 48 MHz operation from external crystal or ceramic resonator inputs (1–20 MHz range).

It features dual-bank Flash memory supporting read-while-write (RWW) for seamless firmware updates, a 12-channel DMA controller with scatter-gather capability, and peripheral event controller (PEC) for autonomous low-latency peripheral synchronization without CPU intervention.

Key Specifications

Pinout & Package

UPD70F3820GB-GAH-AX is housed in a 100-pin LQFP package with exposed thermal pad (EP). Pin assignments follow Renesas' standardized V850ES/JG3-H pinout layout, including dedicated CANH/CANL differential pairs, JTAG debug interface (TCK/TMS/TDI/TDO/TRST), and configurable I/O ports with programmable pull-up/pull-down and hysteresis.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F566TEADFP and STM32H743VIT6, the UPD70F3820GB-GAH-AX delivers tighter integration of CAN 2.0B PHY, lower-power real-time determinism via PEC, and proven field reliability in long-lifecycle industrial deployments - making it optimal where CAN-native control and firmware update resilience are primary design constraints.

Availability

UPD70F3820GB-GAH-AX is available at Aetrix Electronics and suitable for industrial motor drives, factory automation gateways, and railway signaling interfaces requiring stable component supply across 10+ year production cycles.

Supply support for UPD70F3820GB-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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for automotive, industrial, and IoT markets.

The UPD70F3820GB-GAH-AX belongs to the V850ES/JG3-H product line, designed specifically for deterministic real-time control in harsh industrial environments with emphasis on CAN integration, Flash reliability, and long-term supply stability.

FAQ

What is the maximum operating frequency of the UPD70F3820GB-GAH-AX?

The UPD70F3820GB-GAH-AX operates at a maximum CPU frequency of 48 MHz, achieved using its on-chip PLL with external crystal input (1–20 MHz range). This frequency is fully supported across the −40 °C to +85 °C temperature range and enables sub-microsecond interrupt response times required for real-time industrial control loops. The UPD70F3820GB-GAH-AX maintains timing accuracy through internal voltage regulation and clock monitoring circuitry.

Does the UPD70F3820GB-GAH-AX include integrated CAN transceivers?

No, the UPD70F3820GB-GAH-AX integrates CAN protocol controllers compliant with ISO 11898-1 (CAN 2.0B), but requires external CAN transceivers (e.g., SN65HVD230) for physical layer signaling. Its CANH/CANL pins are digital-level outputs/inputs directly tied to the transceiver's TXD/RXD lines. The UPD70F3820GB-GAH-AX supports two independent CAN channels with configurable bit timing and message object filtering.

What debug interface does the UPD70F3820GB-GAH-AX support?

The UPD70F3820GB-GAH-AX supports standard JTAG (IEEE 1149.1) for on-chip debugging, flash programming, and boundary-scan testing. Pins TCK, TMS, TDI, TDO, and TRST are dedicated for this interface and are electrically compatible with Renesas E2 emulator and third-party JTAG tools. The UPD70F3820GB-GAH-AX also supports SWD mode via optional configuration, though JTAG remains the primary and fully documented debug path.

Is the UPD70F3820GB-GAH-AX pin-compatible with other V850ES/JG3-H family members?

Yes, the UPD70F3820GB-GAH-AX shares identical 100-pin LQFP mechanical and electrical pinout with other members of the V850ES/JG3-H family, including μPD70F3760, μPD70F3765, and μPD70F3771. Pin functions are consistent across the family, allowing direct substitution where Flash/RAM capacity and peripheral enablement align. The UPD70F3820GB-GAH-AX retains full backward compatibility with existing PCB layouts designed for these variants.

What is the Flash memory endurance and data retention specification for the UPD70F3820GB-GAH-AX?

The UPD70F3820GB-GAH-AX features 512 KB of on-chip SuperFlash® memory rated for 100,000 program/erase cycles and 20-year data retention at +85 °C. This specification is validated per Renesas' industrial qualification standards and applies to both single-word and page-write operations. The UPD70F3820GB-GAH-AX supports dual-bank architecture to enable read-while-write functionality without interrupting code execution.