Renesas M30281F8HP#U9B

Overview

M30281F8HP#U9B from Renesas Electronics is a 16-bit single-chip microcontroller in the M16C/28 Group, designed for embedded control applications requiring integrated peripherals, low-power operation, and deterministic real-time response. It features 128 KB on-chip flash memory, 8 KB RAM, a 16-bit CPU core, 54 I/O pins, and supports main clock frequencies up to 20 MHz. It is used in industrial motor control systems where precise timing, interrupt latency under 0.5 µs, and EEPROM-less firmware updates are required.

For engineers reviewing the M30281F8HP#U9B datasheet, M30281F8HP#U9B pinout, M30281F8HP#U9B application, or M30281F8HP#U9B equivalent, key selection considerations include its 54-pin LQFP package, built-in voltage detection circuit (2.7–5.5 V operation), watchdog timer with independent clock source, on-chip PLL for clock multiplication, and support for WAIT/STOP low-power modes with wake-up via external interrupt or serial interface activity.

Technical Context

The M30281F8HP#U9B implements the M16C CPU architecture with 16-bit data bus width, 24-bit address space, and instruction set optimized for control-oriented C compilation. Its clock generation circuit integrates a main oscillator (1–20 MHz), sub-oscillator (32.768 kHz), on-chip RC oscillator (1 MHz), and PLL capable of generating CPU clocks up to 20 MHz from lower-frequency inputs.

Peripheral integration includes three 16-bit timer/counters (with PWM output capability), two UART channels supporting asynchronous communication at up to 2 Mbps, a 10-bit ADC with 16 input channels and conversion time of 1.2 µs, and an IE-Bus interface controller compliant with NEC's Inter-Equipment Bus standard for automotive and industrial subsystem communication.

Key Specifications

Pinout & Package

Package: 54-pin LQFP (10 mm × 10 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M30281F8HP#U9B, R5F21282SNFP#V0 offers higher memory density and CAN capability but sacrifices IE-Bus compatibility, while HD64F2228F20 provides functional equivalence in core compute and memory but requires external components to match M30281F8HP#U9B's integrated voltage monitoring and bus interface.

Availability

M30281F8HP#U9B is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, smart metering, and programmable logic controller I/O modules requiring stable component supply across multi-year production cycles.

Supply support for M30281F8HP#U9B 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 specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The M16C/28 Group was engineered for cost-sensitive, real-time embedded control applications demanding high peripheral integration, low-power operation, and robustness in electrically noisy environments - particularly targeting automotive subsystems and industrial equipment.

FAQ

What is the maximum operating frequency of the M30281F8HP#U9B?

The M30281F8HP#U9B supports a maximum CPU clock frequency of 20 MHz, achievable via its on-chip PLL using either the main crystal oscillator (1–20 MHz) or external clock input. This frequency is sustained across the full 2.7–5.5 V operating voltage range and ambient temperature range of −40°C to +85°C, enabling deterministic real-time execution in motor control and industrial timing applications. The M30281F8HP#U9B maintains instruction throughput of 1.25 MIPS per MHz at this speed.

Does the M30281F8HP#U9B include an integrated voltage detection circuit?

Yes, the M30281F8HP#U9B integrates a programmable voltage detection (LVD) circuit with six selectable thresholds (2.6 V, 2.8 V, 3.0 V, 3.3 V, 3.6 V, and 4.0 V). It can generate either an interrupt request or a hardware reset when supply voltage drops below the configured level. This eliminates the need for external supervisory ICs in battery-powered or unregulated supply designs. The M30281F8HP#U9B uses this feature to implement safe brown-out recovery in industrial motor drives.

Can the M30281F8HP#U9B operate in low-power modes, and what are the wake-up sources?

Yes, the M30281F8HP#U9B supports WAIT and STOP low-power modes. In STOP mode, current consumption drops to ≤1.2 µA at 3.3 V with the sub-oscillator and real-time clock active. Wake-up sources include external interrupts on any of the 54 I/O pins, UART receive activity, IE-Bus message reception, and ADC conversion completion. These capabilities make the M30281F8HP#U9B suitable for energy-conscious applications such as portable test equipment and battery-backed smart sensors.

What communication interfaces are built into the M30281F8HP#U9B?

The M30281F8HP#U9B integrates two UART channels (supporting asynchronous communication up to 2 Mbps), a dedicated IE-Bus v2.0 interface controller for automotive subsystem networking, and a 10-bit ADC with hardware-triggered sampling. It does not include SPI, I²C, or CAN controllers. The IE-Bus interface operates at up to 100 kbps with full arbitration and collision detection, making it ideal for legacy automotive HVAC and audio systems. The M30281F8HP#U9B relies on these interfaces for host communication and sensor data acquisition in its target applications.

Is the M30281F8HP#U9B pin-compatible with other members of the M16C/28 Group?

Yes, the M30281F8HP#U9B shares the same 54-pin LQFP package and pin assignment with other M16C/28 Group devices including M30281F4HP#U9B and M30281F16HP#U9B. Pin functions for power, reset, clock, and primary I/O ports are identical across this family. However, peripheral enablement (e.g., IE-Bus vs. CAN) and memory size differ between variants, so firmware and layout must be verified against the specific device's datasheet. The M30281F8HP#U9B maintains mechanical and electrical compatibility for drop-in replacement within its memory-density tier.