Renesas DF38086RLP10WV

Overview

DF38086RLP10WV from Renesas Electronics is a 16-bit single-chip microcomputer in the H8/300H Super Low Power Series, featuring an H8/300H CPU core with H8/300 instruction set compatibility, 512 KB on-chip mask ROM, 32 KB RAM, and integrated peripherals including TPU, SCI, I²C, and RTC. It operates at up to 20 MHz, supports multiple low-power modes (subactive, subsleep, standby), and targets embedded control in industrial and office equipment.

For engineers reviewing the DF38086RLP10WV datasheet, DF38086RLP10WV pinout, DF38086RLP10WV application, or DF38086RLP10WV equivalent, key selection criteria include its 80-pin TQFP package, 3.3 V operation, flash-less mask ROM configuration, subclock RTC support, and interrupt controller with three-level maskable priority - all critical for deterministic real-time control in power-sensitive systems.

Technical Context

The DF38086RLP10WV implements a Harvard-architecture H8/300H CPU with 24-bit address space, supporting both medium-speed (φM) and high-speed (φH) clock domains. Its system clock generator accepts external crystals (4.19 MHz or 32.768 kHz) or on-chip oscillators, with programmable prescalers and mode transition logic enabling five operating states: active, subactive, subsleep, standby, and watch.

Peripheral integration includes a 16-bit timer pulse unit (TPU) with input capture/output compare/PWM, four serial communication interfaces (SCI0–SCI3), an I²C bus interface, a real-time clock (RTC) with calendar function, and a watchdog timer (WDT). Interrupt handling uses a dedicated controller with five priority registers (IPRA–IPRE) and mask levels 0–2 for deterministic response to up to 43 internal/external sources.

Key Specifications

Pinout & Package

DF38086RLP10WV is housed in a 80-pin TQFP package (PTQP0080KC-A), measuring 12 mm × 12 mm with 0.5 mm pitch. The package supports fine-pitch PCB layout and thermal dissipation suitable for enclosed industrial enclosures.

Key Features

Applications

Equivalent & Alternatives

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

Compared with H8/38086RF, DF38086RLP10WV trades field-upgradability for lower BOM cost and higher security; compared with H8/38085R, it delivers double memory and full peripheral set at minimal incremental silicon cost - making it optimal for mid-complexity industrial controllers needing reliability and scalability.

Availability

DF38086RLP10WV is available at Aetrix Electronics and suitable for industrial PLC I/O modules, office equipment motor control, energy meter data loggers, building automation sensor hubs, and embedded instrumentation requiring stable component supply across multi-year production cycles.

Supply support for DF38086RLP10WV 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 H8/38086R Group belongs to Renesas' legacy H8 Family of 16-bit MCUs, designed specifically for cost-sensitive, ultra-low-power embedded control in office automation, industrial equipment, and consumer appliances where deterministic real-time performance and long-term supply stability are essential.

FAQ

What is the maximum operating frequency of the DF38086RLP10WV?

The DF38086RLP10WV supports a maximum system clock frequency of 20 MHz in high-speed (φH) mode. This frequency is achieved using the external main oscillator (e.g., 4.19 MHz crystal with PLL multiplication) or internal oscillator, and enables deterministic execution of real-time control algorithms with sub-microsecond interrupt latency. DF38086RLP10WV maintains full peripheral functionality at this speed, including TPU PWM generation and SCI baud rate generation up to 1 Mbps.

Does the DF38086RLP10WV include on-chip flash memory?

No, the DF38086RLP10WV does not include on-chip flash memory. It features 512 KB of mask-programmed ROM, which is programmed during wafer fabrication and cannot be modified in the field. This architecture ensures firmware immutability and lower unit cost for high-volume production, but requires final firmware validation prior to manufacturing. DF38086RLP10WV relies on mask ROM for program storage, distinguishing it from flash-based variants like the H8/38086RF.

Can the DF38086RLP10WV operate from a 32.768 kHz crystal alone?

Yes, the DF38086RLP10WV can operate using only the 32.768 kHz subclock (XT1/XT2) in watch mode or subsleep mode, where the RTC remains active and RAM contents are retained. However, full CPU execution and peripheral operation require the main system clock (OSC1/OSC2) - the 32.768 kHz signal alone cannot drive the H8/300H core at usable speeds. DF38086RLP10WV uses the subclock exclusively for timekeeping and low-power wake-up triggers, not for general-purpose computation.

What debugging interfaces are supported by the DF38086RLP10WV?

The DF38086RLP10WV supports on-chip debugging via dedicated pins (NMI, P16, P36, P37), but these pins are reserved and functionally unavailable when the debugger is active. Debugging requires the Renesas E8 emulator or compatible toolchain, and restricts use of those pins for application I/O. DF38086RLP10WV does not support SWD or JTAG; its debug interface is proprietary and tightly coupled to Renesas' E8/E7 ecosystem, limiting third-party tool compatibility.

Is the DF38086RLP10WV RoHS compliant?

Yes, the DF38086RLP10WV is RoHS compliant, meeting EU Directive 2011/65/EU requirements for restriction of hazardous substances. Renesas Electronics confirms lead-free packaging and halogen-free molding compounds for this device, as documented in official product change notices and material declarations. DF38086RLP10WV is rated for "Standard" quality grade and approved for use in office equipment, industrial robots, and test/measurement instruments per Renesas' quality classification policy.