Renesas UPD70F3377AM1GCA1-UEU-AX

Overview

UPD70F3377AM1GCA1-UEU-AX from NEC Electronics is a 32-bit V850ES/FE3 single-chip microcontroller featuring 256 KB Flash memory, 16 KB RAM, 100-pin LQFP package, CAN 2.0B interface, and integrated 10-bit A/D converter with 16 channels. It operates across -40°C to +85°C at 3.3–5.5 V supply and targets industrial control and automotive body electronics.

For engineers reviewing the UPD70F3377AM1GCA1-UEU-AX datasheet, UPD70F3377AM1GCA1-UEU-AX pinout, UPD70F3377AM1GCA1-UEU-AX application, or UPD70F3377AM1GCA1-UEU-AX equivalent, key selection criteria include CAN timing compliance (tCANH = 120 ns max), Flash programming voltage (VDD ≥ 3.3 V), EVDD/BVDD dual-supply domain separation, and A/D conversion accuracy (±2 LSB INL) under AVREF0 ≥ 4.0 V.

Technical Context

The UPD70F3377AM1GCA1-UEU-AX implements the V850ES CPU core with 32-bit RISC architecture, supporting 16/32-bit mixed instruction set and on-chip debug interface. Its clock system integrates main crystal oscillator (4–16 MHz), sub-oscillator (32–35 kHz), internal RC oscillator (240 kHz), PLL for up to 32 MHz system clock, and SSCG for EMI reduction.

It features dedicated power domains: EVDD/EVSS for digital I/O and core logic, BVDD for backup RAM retention, AVREF0/AVSS for analog subsystem, and VRO-regulated 2.5 V for internal reference. Pin Groups 1x/2x/6 are EVDD-supplied CMOS I/O; Group 4 (P70–P715) is AVREF0-supplied A/D input; Group 7 (X1/X2/XT1/XT2) connects external resonators.

Key Specifications

Pinout & Package

UPD70F3377AM1GCA1-UEU-AX is housed in a 100-pin LQFP (Low-profile Quad Flat Package) with 0.5 mm lead pitch, 14 mm × 14 mm body, and exposed thermal pad. Pin 1 is marked by a dot or beveled corner; pin numbering follows counter-clockwise sequence from top-left corner when viewed top-side.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F566TEADFP and MB9BF516RPMC, UPD70F3377AM1GCA1-UEU-AX delivers deterministic CAN 2.0B timing, integrated VRO regulation, and proven industrial temperature stability - making it optimal for cost-constrained, CAN-centric embedded control where external component count and power domain complexity must be minimized.

Availability

UPD70F3377AM1GCA1-UEU-AX is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, smart energy metering, and factory automation I/O terminals requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for UPD70F3377AM1GCA1-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

NEC Electronics Corporation (now part of Renesas Electronics) was a Japanese semiconductor manufacturer specializing in microcontrollers, analog ICs, and display drivers for industrial and automotive markets.

The V850ES/FE3 product line was designed for high-reliability embedded control in harsh environments, emphasizing integrated peripherals (CAN, A/D, POC), multi-voltage domain operation, and Flash endurance for firmware updates in field-deployed equipment.

FAQ

What is the maximum operating frequency of the UPD70F3377AM1GCA1-UEU-AX CPU core?

The UPD70F3377AM1GCA1-UEU-AX V850ES CPU core supports a maximum system clock frequency of 32 MHz when using the PLL with a 4–16 MHz main crystal oscillator. At 3.3–4.0 V supply, peripheral clock limits reduce to 20 MHz; full 32 MHz operation requires VDD ≥ 4.0 V per Section 2.3 of the datasheet.

Does the UPD70F3377AM1GCA1-UEU-AX include an integrated CAN transceiver?

No, the UPD70F3377AM1GCA1-UEU-AX integrates only the CAN protocol controller (CAN 2.0B compliant), not the physical layer transceiver. An external CAN transceiver (e.g., TJA1042 or SN65HVD230) must be used to drive the differential CAN_H/CAN_L bus lines.

What is the purpose of the BVDD pin on the UPD70F3377AM1GCA1-UEU-AX?

The BVDD pin supplies backup power to retain the contents of the 16 KB SRAM during main power loss. When connected to a coin cell or supercapacitor, BVDD enables the UPD70F3377AM1GCA1-UEU-AX to maintain critical variables, calibration data, or event logs across power cycles without requiring external nonvolatile storage.

Can the UPD70F3377AM1GCA1-UEU-AX operate with AVREF0 below 4.0 V?

Yes, but A/D conversion accuracy degrades: the datasheet specifies ±2 LSB INL only when AVREF0 ≥ 4.0 V. Below 4.0 V, the ADA0CE bit must be cleared to disable A/D operation, as linearity falls outside specification. For full 10-bit performance, AVREF0 must be stabilized within 3.3–5.5 V and ≥ 4.0 V.

How does the Power-On Control (POC) function work in the UPD70F3377AM1GCA1-UEU-AX?

The POC circuit in the UPD70F3377AM1GCA1-UEU-AX automatically asserts the internal RESET signal until the VRO regulator output reaches 2.5 V ±5% and stabilizes. This eliminates the need for an external reset supervisor IC and ensures deterministic initialization of Flash, RAM, and peripherals before CPU execution begins.