Renesas HD64F3670FPV

Overview

HD64F3670FPV from Renesas Electronics is a 16-bit single-chip microcontroller in the H8/300H Tiny Series, featuring an H8/300H CPU core with instruction compatibility to the H8/300, 32 KB on-chip ROM, 2 KB RAM, and integrated peripherals including timers, serial interfaces (SCI), and I/O ports. It operates at up to 20 MHz and targets embedded control in industrial equipment and consumer appliances.

For engineers reviewing the HD64F3670FPV datasheet, HD64F3670FPV pinout, HD64F3670FPV application, or HD64F3670FPV equivalent, key selection criteria include its 64-pin LQFP package, 3.3 V/5 V dual-voltage operation support, on-chip flash programming capability, and low-power sleep/standby modes for energy-constrained systems.

Technical Context

The HD64F3670FPV implements the H8/300H CPU architecture with 16-bit data bus and 24-bit address space, supporting both big-endian memory layout and 16/32-bit register operations. Its system clock generator accepts crystal, ceramic resonator, or external clock inputs, with programmable prescalers enabling flexible timing configuration across operating modes.

Peripheral integration includes two 16-bit timer/counters (with input capture/output compare), one 8-bit timer, a serial communication interface (SCI) compatible with UART protocols, and 48 general-purpose I/O pins configurable as inputs, outputs, or alternate-function signals. Power management is handled via SYSCR1/SYSCR2 registers controlling Sleep, Standby, and Subsleep modes.

Key Specifications

Pinout & Package

HD64F3670FPV is housed in a 64-pin Low-Profile Quad Flat Package (LQFP) with exposed thermal pad, rated for industrial temperature range (–40°C to +85°C). Pin numbering follows standard counter-clockwise convention starting from the index corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HD64F3670FPV, HD64F3672FPV offers double ROM without layout changes, while R5F100LEAFB delivers superior power efficiency and memory scalability at the cost of architectural discontinuity and software rework.

Availability

HD64F3670FPV is available at Aetrix Electronics and suitable for industrial motor control, home appliance control panels, and factory automation I/O modules requiring stable component supply and long-term lifecycle support.

Supply support for HD64F3670FPV 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 HD64F3670FPV belongs to the H8/300H Tiny Series - a family of cost-optimized 16-bit MCUs designed for resource-constrained embedded control applications requiring reliability, low power, and mature development ecosystems.

FAQ

What is the maximum operating frequency of the HD64F3670FPV?

The HD64F3670FPV supports a maximum operating frequency of 20 MHz when powered at 5.0 V or 3.3 V. This frequency is achieved using an external crystal (up to 20 MHz), ceramic resonator, or clock input. The internal clock generator includes prescalers that allow division of the base clock for peripheral timing, ensuring deterministic timing across all modules within the HD64F3670FPV's operational envelope.

Does the HD64F3670FPV support in-system programming of its on-chip memory?

Yes, the HD64F3670FPV supports in-system programming via its built-in flash memory controller. Using boot mode or user program mode, firmware updates can be performed through the SCI interface or parallel programming pins. Key registers - FLMCR1, FLMCR2, EBR1, and FENR - manage erase, program, and verify operations, enabling field upgrades without removing the HD64F3670FPV from the target board.

What power-saving modes are available on the HD64F3670FPV?

The HD64F3670FPV implements three hardware-controlled low-power modes: Sleep (CPU halted, peripherals active), Standby (<10 µA typical), and Subsleep (intermediate current draw with fast wake-up). Mode entry is controlled via SYSCR1 and SYSCR2 registers. Wake-up sources include external interrupts, timer match events, and SCI receive activity - all configurable to meet strict energy budgets in battery-powered HD64F3670FPV applications.

Is the HD64F3670FPV pin-compatible with other members of the H8/367x family?

Yes, the HD64F3670FPV shares the same 64-pin LQFP package and pin assignment with HD64F3672FPV and HD64F3674FPV. Signal mapping for power, reset, clock, I/O ports, and peripheral functions (SCI, timers) is identical across these variants. This allows drop-in replacement where increased ROM (64 KB) or additional features (e.g., more timers) are needed - provided firmware and voltage requirements remain aligned for the HD64F3670FPV design context.

What development tools are officially supported for the HD64F3670FPV?

Renesas officially supports the HD64F3670FPV with the High-Performance Embedded Workshop (HEW) IDE, E8 in-circuit emulator, and the H8/300H Series C/C++ Compiler (document number REJ10B0058). Debugging is enabled via the NMI pin and dedicated on-chip debug circuitry. Application notes such as REJ05B0464 provide guidance on compiler optimization and flash programming workflows specific to the HD64F3670FPV and related H8/367x devices.