Renesas M30281F8HP#U7B

Overview

M30281F8HP#U7B 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 real-time responsiveness. It features 128 KB on-chip flash memory, 8 KB RAM, a 16-bit CPU core, 50 MHz max operating frequency, and supports IEBus, UART, and PWM functions - deployed in industrial motor control systems.

For engineers reviewing the M30281F8HP#U7B datasheet, M30281F8HP#U7B pinout, M30281F8HP#U7B application, or M30281F8HP#U7B equivalent, key selection criteria include flash endurance (10,000 write/erase cycles), operating voltage range (2.7–5.5 V), built-in voltage detection circuit, and support for WAIT/STOP low-power modes with fast wake-up.

Technical Context

The M30281F8HP#U7B implements the M16C CPU architecture with 16-bit data bus and 24-bit address space, supporting both CISC instruction set and bit manipulation instructions for efficient peripheral control. It integrates a PLL clock generator, on-chip oscillator, sub-clock input, and multiple clock sources enabling flexible system timing configurations including f1, f2, f8, f32, and SIO-specific clocks.

Its interrupt system includes 128 vector entries, priority-level control (IPL), and dedicated hardware for IEBus communication protocol handling. The device supports hardware reset, watchdog timer reset, oscillation stop detection reset, and low-voltage detection interrupt - all configurable via dedicated SFRs without software overhead.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, standard JEDEC MO-220 footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M30281F8HP#U7B, R5F102AAASP#30 offers superior energy efficiency but lacks IEBus hardware acceleration, while MB95560P provides CAN connectivity at the expense of IEBus support - making M30281F8HP#U7B irreplaceable in legacy automotive IEBus ecosystems.

Availability

M30281F8HP#U7B is available at Aetrix Electronics and suitable for industrial motor control, automotive HVAC subsystems, and home appliance main boards requiring stable component supply across extended product lifecycles.

Supply support for M30281F8HP#U7B 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, and power devices for industrial, automotive, and infrastructure markets.

The M16C/28 Group, including M30281F8HP#U7B, was engineered for cost-effective, high-reliability embedded control in automotive body electronics and industrial equipment where IEBus interoperability and deterministic real-time response are critical.

FAQ

What is the maximum operating frequency of the M30281F8HP#U7B?

The M30281F8HP#U7B operates at a maximum frequency of 50 MHz when using the PLL clock source with an external crystal. This frequency is achievable across the full 2.7–5.5 V supply range and ambient temperature range of −40°C to +85°C. The M30281F8HP#U7B achieves this performance through its optimized M16C CPU core and on-chip PLL multiplier, enabling tight real-time control loops in motor and power applications.

Does the M30281F8HP#U7B support IEBus communication natively?

Yes, the M30281F8HP#U7B includes a dedicated hardware IEBus controller compliant with NEC IEBus v2.0 specification. It handles frame formatting, CRC generation/checking, arbitration, and error recovery without CPU intervention. This capability is confirmed in the M16C/28 Group Hardware Manual Rev.2.00 and makes the M30281F8HP#U7B suitable for automotive HVAC and audio head-unit applications where IEBus is the standard inter-module bus.

What low-power modes does the M30281F8HP#U7B support?

The M30281F8HP#U7B supports WAIT mode (CPU halted, peripherals active) and STOP mode (entire system clock stopped except for low-frequency sub-clock). In STOP mode, current consumption drops below 1 μA, with wake-up possible via external interrupt, timer match, or low-voltage detection event. These modes are configured via the System Control Register (SCR) and are validated in Renesas application notes for battery-powered sensor nodes and energy-efficient appliances using the M30281F8HP#U7B.

What is the flash memory endurance rating for the M30281F8HP#U7B?

The on-chip flash memory in the M30281F8HP#U7B is rated for 10,000 write/erase cycles per sector, as specified in the Renesas M16C/28 Group Hardware Manual. This endurance level supports field firmware updates and parameter storage in industrial controllers. The M30281F8HP#U7B also includes a boot swap area and lock bits to prevent accidental overwrite during programming operations.

Is the M30281F8HP#U7B pin-compatible with other M16C/28 family members?

The M30281F8HP#U7B uses the standard 100-pin LQFP package shared across the M16C/28 Group, including variants like M30281F4HP#U7B and M30281F6HP#U7B. Pin assignments for power, reset, clock, and core peripherals are identical; however, some alternate function mappings (e.g., IEBus vs. UART channel assignment) differ between variants. Therefore, PCB layout reuse is possible only when verifying signal routing against the specific variant's pin description table in the M16C/28 Group Hardware Manual.