Renesas M30281FCHP#U7B

Overview

M30281FCHP#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 industrial-grade reliability. It features 256 KB on-chip flash memory, 16 KB RAM, a 16-bit CPU core operating at up to 20 MHz, and supports multiple clock sources including main crystal, sub-clock, and on-chip oscillator.

For engineers reviewing the M30281FCHP#U7B datasheet, M30281FCHP#U7B pinout, M30281FCHP#U7B application, or M30281FCHP#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 circuitry, watchdog timer with window function, and support for WAIT/STOP low-power modes in industrial temperature grade (−40°C to +85°C).

Technical Context

The M30281FCHP#U7B implements the M16C CPU architecture with 16-bit data bus and 24-bit address space, enabling direct access to its full 256 KB flash and 16 KB RAM without banking. Its clock generation circuit integrates PLL, main/sub oscillators, and on-chip RC oscillator, allowing flexible clock configuration including frequency multiplication and automatic oscillation stop detection with reset or interrupt generation.

Peripheral integration includes three 16-bit timer/counters (with PWM output), two UART channels with framing error detection, one I²C-compatible serial interface, 10-bit ADC with 16 input channels, and programmable I/O ports with pull-up control and noise filter. All peripherals are memory-mapped via Special Function Registers (SFRs) and support priority-based vectored interrupts.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with M30281FCHP#U7B, R5F102BAASP#V0 offers superior energy efficiency but requires firmware adaptation due to different peripheral register mapping and interrupt vector layout; M30282FHP#U7B provides drop-in hardware compatibility with increased flash and ADC capability for feature-rich upgrades.

Availability

M30281FCHP#U7B is available at Aetrix Electronics and suitable for industrial motor control, building automation, factory floor PLC modules, and medical diagnostic equipment interface applications requiring stable component supply and long-term lifecycle support.

Supply support for M30281FCHP#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 global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and enterprise applications.

The M16C/28 Group, including M30281FCHP#U7B, was engineered for cost-sensitive, high-reliability embedded control in industrial environments where deterministic real-time performance and long product lifecycles are essential.

FAQ

What is the maximum operating frequency of the M30281FCHP#U7B?

The M30281FCHP#U7B supports a maximum CPU clock frequency of 20 MHz. This is achieved using the on-chip PLL with an external crystal (1–20 MHz) or direct external clock input. The device maintains full functionality-including flash read/write, ADC conversion, and peripheral operation-at this speed across the full industrial temperature range (−40°C to +85°C). System timing margins are validated per Renesas Hardware Manual Rev.2.00.

Does the M30281FCHP#U7B include on-chip debug capability?

Yes, the M30281FCHP#U7B includes on-chip debug support compliant with IEEE 1149.1 JTAG. Dedicated pins (BKPT, TRST, TCK, TDI, TDO) enable connection to Renesas E1/E20 emulators for full-featured debugging, including breakpoints, watchpoints, and real-time register/memory inspection. No external debug probe interface IC is required, simplifying development board design and reducing BOM cost.

What low-power modes does the M30281FCHP#U7B support?

The M30281FCHP#U7B supports two primary low-power modes: WAIT mode (CPU halted, peripherals and RAM retained) and STOP mode (all clocks stopped except optional sub-clock for RTC). In STOP mode, current consumption drops to approximately 1.5 µA (typical) with RAM retention. Wake-up sources include external interrupts, timer match events, and LVD interrupts-enabling responsive yet energy-efficient operation in battery-powered or thermally constrained applications.

Is the M30281FCHP#U7B pin-compatible with other M16C/28 family members?

Yes, the M30281FCHP#U7B is pin-compatible with other 100-pin LQFP variants in the M16C/28 Group, including M30282FHP#U7B and M30281FCHP#U5B. Pin assignments for power, reset, clock, and I/O ports are identical across these variants. Firmware migration between them is possible with minor configuration adjustments for differences in flash size, ADC resolution, or peripheral enable registers-verified in Renesas Hardware Manual Section 1.4 and 1.5.

What is the flash memory endurance specification for the M30281FCHP#U7B?

The M30281FCHP#U7B specifies 10,000 write/erase cycles for its 256 KB on-chip flash memory, with data retention guaranteed for 20 years at +85°C. Block erase granularity is 128 bytes, enabling efficient firmware updates and parameter storage. Flash programming is supported via on-chip bootloader using UART or dedicated programming interface, eliminating need for external programmers in production or field update scenarios.