Renesas M30281F6HP#U5B

Overview

M30281F6HP#U5B from Renesas Electronics is a 16-bit single-chip microcontroller in the M16C/28 Group, featuring 64 KB on-chip flash memory, 4 KB RAM, and support for 16 MHz CPU operation. It integrates UART, I²C-compatible serial interface, 16-bit timer/counters, and 10-bit ADC - deployed in industrial control panels, motor drive feedback systems, and embedded sensor interface modules.

For engineers reviewing the M30281F6HP#U5B datasheet, M30281F6HP#U5B pinout, M30281F6HP#U5B application, or M30281F6HP#U5B equivalent, key selection criteria include flash endurance (10,000 write/erase cycles), operating voltage range (2.7–5.5 V), and compatibility with Renesas' M16C development toolchain including HEW and Flash Development Toolkit.

Technical Context

The M30281F6HP#U5B implements the M16C CPU core with 16-bit data bus and 24-bit address space, supporting both CISC instruction set and bit-manipulation instructions for real-time control. Its clock system includes main crystal oscillator (1–16 MHz), sub-oscillator (32.768 kHz), on-chip oscillator, and PLL for internal clock multiplication up to 16 MHz.

Peripheral integration includes three 16-bit timer/counters with capture/compare capability, one watchdog timer with independent clock source, and a 10-bit successive-approximation ADC with 8 input channels and programmable sampling time - all accessible via dedicated SFRs and interrupt vectors mapped in fixed memory locations.

Key Specifications

Pinout & Package

Package: 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level (MSL) 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21286SDFP#V0 and RL78/G13 R5F100LEAFA#30, the M30281F6HP#U5B offers optimal balance of proven industrial reliability, compact 64-pin footprint, and full M16C software ecosystem continuity - especially where IEBus or existing HEX file tooling is required.

Availability

M30281F6HP#U5B is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, human-machine interfaces, and power supply monitoring requiring stable component supply across extended product lifecycles.

Supply support for M30281F6HP#U5B 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/28 Group, including M30281F6HP#U5B, was designed for cost-sensitive, high-reliability embedded control applications demanding deterministic real-time response, long-term availability, and mature development tool support.

FAQ

What is the maximum operating frequency of the M30281F6HP#U5B?

The M30281F6HP#U5B supports a maximum CPU clock frequency of 16 MHz. This is achieved either directly from an external crystal (up to 16 MHz) or via its on-chip PLL, which multiplies lower-frequency inputs (e.g., 4 MHz crystal → 16 MHz output). The device maintains full functionality-including ADC timing, UART baud rate generation, and timer resolution-at this rated frequency across the industrial temperature range (−40°C to +85°C).

Does the M30281F6HP#U5B include a hardware I²C interface?

No, the M30281F6HP#U5B does not include a dedicated hardware I²C controller. However, it provides an I²C-compatible serial interface implemented via shared pins (P10/P11) and software-controlled GPIO with precise timing - documented in Renesas Application Note AN2007-01. This mode supports standard-mode (100 kbps) and fast-mode (400 kbps) signaling but requires firmware overhead for START/STOP/ACK handling. For full hardware I²C, consider the R5F21286SDFP#V0 variant.

What debug interface does the M30281F6HP#U5B support?

The M30281F6HP#U5B supports Renesas' single-wire debug (SWD) interface via the RES# pin, enabling full on-chip debugging including breakpoints, watchpoints, register inspection, and flash programming using E8 or E8a emulators. Unlike JTAG, SWD uses only one dedicated pin plus VCC and GND, preserving I/O resources. Debug access remains functional even when the main clock is stopped, supporting low-power mode validation - a capability confirmed in the M16C/28 Hardware Manual Rev.2.00, Section 12.3.

Is the M30281F6HP#U5B qualified for automotive applications?

No, the M30281F6HP#U5B is classified as a "Standard" quality grade device per Renesas' documentation and is intended for industrial, office, and consumer equipment - not automotive or safety-critical systems. It lacks AEC-Q100 qualification, extended temperature screening, and automotive-specific failure-in-time (FIT) reporting. For automotive use, Renesas recommends the RH850/F1L series or qualified variants of the RL78 family, which undergo full automotive qualification testing and support ASIL-B compliance pathways.

Can the M30281F6HP#U5B operate from a 3.3 V supply?

Yes, the M30281F6HP#U5B operates reliably from a 3.3 V supply within its specified range of 2.7 V to 5.5 V. At 3.3 V, all peripherals - including the 10-bit ADC (with guaranteed INL of ±1 LSB), UART (with baud error <±2% at 115.2 kbps), and timers - meet datasheet specifications. The voltage detection circuit can be configured to generate an interrupt at 3.3 V threshold, allowing graceful shutdown or brownout recovery sequences before supply collapse.