Renesas M30291FCHP#U3A

Overview

M30291FCHP#U3A from Renesas Electronics is a 16-bit CMOS microcontroller in the M16C/29 Group, designed for embedded control in industrial and consumer systems. It features 256 KB on-chip Flash memory, 16 KB RAM, a 16-bit CPU core operating at up to 20 MHz, and integrated peripherals including UART, I²C, CAN 2.0B controller, and 10-bit ADC. It targets motor control and sensor interface applications requiring deterministic real-time response.

For engineers reviewing the M30291FCHP#U3A datasheet, M30291FCHP#U3A pinout, M30291FCHP#U3A application, or M30291FCHP#U3A equivalent, key selection criteria include its CAN 2.0B compliance, 20 MHz max CPU clock, 10-bit 16-channel ADC resolution and conversion time, Flash endurance (10,000 write/erase cycles), and support for low-power Stop/Wait modes with wake-up via external interrupt or peripheral event.

Technical Context

The M30291FCHP#U3A implements the M16C CPU architecture with 16-bit data bus and 24-bit address space, supporting both CISC instruction set and efficient bit manipulation. Its on-chip clock generation includes main crystal oscillator (1–20 MHz), sub-oscillator (32.768 kHz), and PLL for internal clock multiplication up to 20 MHz.

It integrates a full CAN 2.0B controller with 16 message objects, programmable acceptance filtering, and automatic retransmission. The peripheral set also includes three 16-bit timer/counters (with PWM output), two serial interfaces (UART and I²C), and a 10-bit ADC with 16 input channels and 1.2 μs typical conversion time.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, standard JEDEC MO-140 footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F102AAASP#30 and MB9BF568RPMC, the M30291FCHP#U3A offers balanced integration of CAN 2.0B, 256 KB Flash, and deterministic real-time response at lower system cost - making it optimal for established industrial control designs where CAN interoperability and proven qualification are essential.

Availability

M30291FCHP#U3A is available at Aetrix Electronics and suitable for industrial motor drives, building automation nodes, automated test equipment, and energy metering interfaces requiring stable component supply and long-term lifecycle support.

Supply support for M30291FCHP#U3A 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 leader headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The M16C/29 Group, which includes the M30291FCHP#U3A, was engineered for deterministic real-time control in cost-sensitive industrial applications - emphasizing CAN connectivity, Flash reliability, and low-power operation without sacrificing interrupt responsiveness.

FAQ

What is the maximum operating frequency of the M30291FCHP#U3A?

The M30291FCHP#U3A operates at a maximum CPU clock frequency of 20 MHz. This is achieved using the on-chip PLL with an external crystal (1–20 MHz) or external clock source. At 20 MHz, the M30291FCHP#U3A delivers 20 million instruction cycles per second, enabling sub-microsecond interrupt response and tight control loop execution - critical for applications like motor commutation and real-time sensor fusion.

Does the M30291FCHP#U3A include an integrated CAN controller?

Yes, the M30291FCHP#U3A includes a fully compliant CAN 2.0B controller with 16 message objects, hardware acceptance filtering, and automatic retransmission. It supports both standard (11-bit) and extended (29-bit) identifier formats. The M30291FCHP#U3A requires an external CAN transceiver (e.g., TJA1050) for physical layer interfacing, but all protocol handling - including bit timing, error detection, and message buffering - is performed in hardware by the M30291FCHP#U3A itself.

What package type and pin count does the M30291FCHP#U3A use?

The M30291FCHP#U3A is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch), compliant with JEDEC MO-140 standards. This package provides full access to all peripherals including dual UARTs, CAN TX/RX, 16 ADC inputs, three 16-bit timers, and 80 general-purpose I/O pins. The M30291FCHP#U3A's pinout is documented in Section 1.4 ("Pin Assignments") of the M16C/29 Group Hardware Manual (Rev. 1.12).

What is the Flash memory endurance specification for the M30291FCHP#U3A?

The on-chip Flash memory in the M30291FCHP#U3A is rated for 10,000 write/erase cycles under standard operating conditions (Ta = 25 °C). This endurance level supports field firmware updates and parameter storage in industrial applications with infrequent reprogramming. The M30291FCHP#U3A also includes Flash protection features such as block locking and security bits to prevent unauthorized read/write access - ensuring integrity of deployed code and calibration data.

How does the M30291FCHP#U3A handle power management in low-power applications?

The M30291FCHP#U3A supports three low-power modes: Normal, Wait, and Stop. In Stop mode, current consumption drops to 0.5 μA (typical) while retaining RAM contents and allowing wake-up via external interrupt or peripheral event (e.g., CAN message reception). The M30291FCHP#U3A's clock control unit enables dynamic switching between modes and selective peripheral clock gating - allowing designers to optimize power vs. responsiveness trade-offs in battery-powered or energy-harvesting systems.