Renesas M30281F8HP#U3B

Overview

M30281F8HP#U3B from Renesas Electronics is a 16-bit single-chip microcontroller in the M16C/28 Group, featuring 128 KB on-chip flash memory, 8 KB RAM, and a maximum CPU clock of 20 MHz. It integrates UART, I²C-compatible serial interface, 16-bit timer/counters, and 10-bit ADC - designed for real-time control in industrial motor drives and sensor-based embedded systems.

For engineers reviewing the M30281F8HP#U3B datasheet, M30281F8HP#U3B pinout, M30281F8HP#U3B application, or M30281F8HP#U3B equivalent, key selection criteria include its 100-pin LQFP package, 2.7–5.5 V operating voltage range, built-in low-voltage detection, and support for WAIT/STOP power-saving modes in resource-constrained edge-control applications.

Technical Context

The M30281F8HP#U3B implements the M16C CPU core with 16-bit data bus and 24-bit address space, supporting both CISC instruction set and on-chip debug functionality via dedicated pins. Its clock system includes main crystal oscillator (1–20 MHz), sub-oscillator (32.768 kHz), and PLL for internal clock multiplication up to 20 MHz.

Peripheral integration includes three 16-bit timer/counters with PWM output capability, one 10-bit 8-channel ADC with conversion time ≤1.7 µs, and dual serial interfaces - one UART with framing error detection and one I²C-compatible interface supporting master/slave mode at up to 400 kbps.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21282SDFP#V0 and RL78/G13 R5F100LEAFP#30, the M30281F8HP#U3B offers full 128 KB flash and mature toolchain compatibility for maintenance of existing M16C-based systems, while retaining pin-level consistency with earlier variants in the same package family.

Availability

M30281F8HP#U3B is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, home appliance UI controllers, and PLC I/O modules requiring stable component supply across multi-year production cycles.

Supply support for M30281F8HP#U3B 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, including M30281F8HP#U3B, was engineered for deterministic real-time control in cost-sensitive embedded systems where reliability, code density, and peripheral integration outweigh raw processing throughput.

FAQ

What is the maximum operating frequency of the M30281F8HP#U3B?

The M30281F8HP#U3B supports a maximum CPU clock frequency of 20 MHz, achieved via its on-chip PLL when driven by an external 1–10 MHz crystal or clock source. This allows consistent 50 ns instruction cycle timing for hard real-time tasks, and the device maintains full functionality across its specified 2.7–5.5 V supply range at this speed.

Does the M30281F8HP#U3B include on-chip debug capability?

Yes, the M30281F8HP#U3B integrates a single-wire on-chip debug interface compliant with Renesas' standard debug protocol. This enables full in-circuit programming, breakpoint setting, and real-time variable monitoring without requiring additional JTAG hardware - a key enabler for field firmware updates and production line calibration of devices using the M30281F8HP#U3B.

What power-saving modes does the M30281F8HP#U3B support?

The M30281F8HP#U3B supports WAIT and STOP modes. In STOP mode, current consumption drops to ≤10 µA while retaining RAM content and enabling wake-up via external interrupt or RTC alarm. WAIT mode reduces current to ~200 µA with clocks halted but peripherals and RAM fully retained - both modes are accessible via dedicated instructions and controlled through the system control registers of the M30281F8HP#U3B.

Is the M30281F8HP#U3B pin-compatible with other M16C/28 family members?

Yes, the M30281F8HP#U3B uses the standard 100-pin LQFP package shared across the M16C/28 Group, including variants like M30281F4HP#U3B and M30281F6HP#U3B. Pin assignments for power, reset, clock, and primary I/O ports are identical; however, some alternate function mappings (e.g., SIO vs. IEBus) differ between variants and must be verified against the specific device's pin description table before PCB reuse.

What is the ADC resolution and channel count of the M30281F8HP#U3B?

The M30281F8HP#U3B integrates a 10-bit successive approximation register (SAR) ADC with eight input channels (AD0–AD7). Conversion time is ≤1.7 µs per sample, and the ADC supports software/start-triggered operation with configurable sample-and-hold timing - making it suitable for direct interfacing with thermistors, potentiometers, and current-sense amplifiers in control loops implemented on the M30281F8HP#U3B.