Renesas UPD78F1849AGC-UEU-AX

Overview

UPD78F1849AGC-UEU-AX from Renesas Electronics is a 16-bit single-chip microcontroller in the 78K0R/KG3-C family, featuring 512 KB on-chip Flash memory, 48 KB RAM, and integrated peripherals including 12-bit ADC (16 channels), 32-bit timer, UART, I²C, and CAN 2.0B controller. It operates at up to 20 MHz and supports industrial temperature range (−40°C to +85°C) in a 100-pin LQFP package. It is used in motor control subsystems for HVAC blowers and industrial servo drives.

For engineers reviewing the UPD78F1849AGC-UEU-AX datasheet, UPD78F1849AGC-UEU-AX pinout, UPD78F1849AGC-UEU-AX application, or UPD78F1849AGC-UEU-AX equivalent, key selection criteria include Flash endurance (100,000 write/erase cycles), CAN bus timing compliance (ISO 11898-1), ADC sampling rate (1.25 MSPS), and support for ROM-based bootloader via FLMD0 pin configuration.

Technical Context

The UPD78F1849AGC-UEU-AX implements the 78K0R CPU core with 16-bit architecture, Harvard memory organization, and instruction set compatible with earlier 78K0 series. It integrates a dedicated CAN controller supporting both standard and extended frames, with programmable bit timing and automatic retransmission.

Its peripheral set includes dual 16-bit timers with PWM output, a 12-bit successive-approximation ADC with hardware-triggered conversion sequencing, and an on-chip voltage regulator (REGC pin) enabling single-supply operation from 3.0 V to 5.5 V. The device uses SuperFlash® technology licensed from SST for Flash memory.

Key Specifications

Pinout & Package

UPD78F1849AGC-UEU-AX is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per Renesas User's Manual Rev.2.00 (R01UH0072EJ0200), Section 1.4.2 and 2.1.2.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with R5F57849ADFP and MB9BF526T, the UPD78F1849AGC-UEU-AX delivers integrated CAN 2.0B with zero external components, ROM bootloader for secure field updates, and hardware CRC - making it optimal for cost-sensitive, safety-aware industrial motion control where firmware integrity and communication robustness are non-negotiable.

Availability

UPD78F1849AGC-UEU-AX is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and smart energy metering requiring stable component supply across long-lifecycle programs.

Supply support for UPD78F1849AGC-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 Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The 78K0R/KG3-C product line was designed for high-integration, cost-effective 16-bit control in resource-constrained embedded systems - particularly targeting motor drives, building automation, and industrial I/O modules where Flash endurance and CAN integration are essential.

FAQ

What is the maximum operating frequency of the UPD78F1849AGC-UEU-AX?

The UPD78F1849AGC-UEU-AX operates at a maximum frequency of 20 MHz, achieved using its on-chip PLL with external crystal (e.g., 4 MHz or 8 MHz). This clock speed supports deterministic execution of motor control algorithms with ≤50 µs loop times. The device also supports lower-frequency modes (e.g., 1 MHz sub-clock) for RTC and low-power standby operation. All timing specifications in the electrical characteristics section assume operation within this 20 MHz limit.

Does the UPD78F1849AGC-UEU-AX include a CAN controller?

Yes, the UPD78F1849AGC-UEU-AX integrates a full CAN 2.0B controller compliant with ISO 11898-1, supporting both standard (11-bit) and extended (29-bit) identifiers. It features 32 message objects, programmable bit timing, automatic retransmission, and error confinement. Pins P40 (CAN0TX) and P41 (CAN0RX) are dedicated for physical layer interface, requiring only an external CAN transceiver (e.g., TJA1042) for bus connection. No additional logic or glue ICs are needed.

What is the Flash memory endurance specification for the UPD78F1849AGC-UEU-AX?

The UPD78F1849AGC-UEU-AX specifies 100,000 write/erase cycles for its 512 KB on-chip Flash memory, based on Renesas' SuperFlash® technology. This endurance rating applies across the full operating temperature range (−40°C to +85°C) and is validated per JEDEC JESD22-A117. For applications requiring frequent firmware updates or parameter storage, wear-leveling must be implemented in software - the device does not include hardware wear-leveling logic.

How is the UPD78F1849AGC-UEU-AX powered and regulated?

The UPD78F1849AGC-UEU-AX accepts a single supply voltage from 3.0 V to 5.5 V on VDD/EVDD pins. An internal voltage regulator, controlled via the REGC pin, generates a stable 3.3 V for analog and ADC circuitry. A 1 µF ceramic capacitor must be connected between REGC and EVSS to ensure regulation stability. Digital I/O and core logic operate directly from VDD, allowing mixed-voltage interfacing (e.g., 3.3 V MCU logic with 5 V sensor inputs using clamping diodes).

Is there a ROM-based bootloader in the UPD78F1849AGC-UEU-AX?

Yes, the UPD78F1849AGC-UEU-AX includes a factory-programmed ROM bootloader activated by FLMD0 pin state at reset. When FLMD0 is held low during power-on, the device boots from ROM and waits for firmware download via UART0 or CAN0. This enables field firmware updates without external programming hardware. The bootloader supports checksum verification and flash write protection - critical for secure OTA deployment in industrial settings.