Renesas HD64F3672FPV

Overview

HD64F3672FPV from Renesas Electronics is a 16-bit single-chip microcomputer in the H8/300H Tiny Series, featuring an H8/300H CPU core with H8/300 instruction set compatibility, 64 KB on-chip ROM, 4 KB RAM, and integrated peripherals including UART, timer/counters, 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 HD64F3672FPV datasheet, HD64F3672FPV pinout, HD64F3672FPV application, or HD64F3672FPV equivalent, key selection criteria include its 64-pin LQFP package, flash memory programmability, low-power sleep/standby modes, and peripheral integration for cost-sensitive, space-constrained MCU designs.

Technical Context

The HD64F3672FPV implements the H8/300H CPU architecture with 24-bit addressing, supporting both byte- and word-aligned memory access. Its system clock generator accepts crystal, ceramic resonator, or external clock inputs, with prescaler S enabling flexible frequency division for peripheral timing.

On-chip memory includes 64 KB of flash ROM (erasable/programmable in-block) and 4 KB of SRAM. Power management features include Sleep, Standby, and Subsleep modes controlled via SYSCR1/SYSCR2 registers, with module-level standby via MSTCR1 for selective peripheral shutdown.

Key Specifications

Pinout & Package

HD64F3672FPV is housed in a 64-pin Low-Profile Quad Flat Package (LQFP) with 0.5 mm lead pitch, designed for reflow soldering and high-density PCB layouts. Pin functions are defined per the H8/3672 Group Hardware Manual Rev.4.00 (2005), with dedicated power, ground, clock, reset, and I/O terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HD64F3672FPV, HD64F3664FPV offers reduced memory for cost-sensitive volume production, while HD64F3684FPV provides scalable memory for evolving firmware requirements-both maintain identical timing, I/O, and power characteristics for drop-in compatibility in existing PCB layouts.

Availability

HD64F3672FPV is available at Aetrix Electronics and suitable for industrial control panels, home appliance controllers, point-of-sale terminals, and smart meter interface modules requiring stable component supply and long-term obsolescence support.

Supply support for HD64F3672FPV 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 IoT markets.

The HD64F3672FPV belongs to the H8/300H Tiny Series, designed for cost-effective, low-power embedded control in resource-constrained applications where integration, reliability, and toolchain maturity are critical.

FAQ

What is the maximum operating frequency of the HD64F3672FPV?

The HD64F3672FPV supports a maximum operating frequency of 20 MHz when driven by an external crystal or clock source. This frequency defines the upper limit for instruction execution speed and peripheral timing resolution. The device's clock pulse generator includes prescaler S to derive lower-frequency clocks for UART baud rate generation or timer intervals. Operation above 20 MHz is not supported and may cause functional failure.

Does the HD64F3672FPV support in-system programming of its flash memory?

Yes, the HD64F3672FPV supports in-system programming (ISP) of its 64 KB on-chip flash memory via boot mode or user program mode. Programming and erasing are performed in blocks using dedicated flash control registers (FLMCR1/FLMCR2) and require specific voltage and timing sequences. The process includes program-verify and erase-verify steps to ensure data integrity, and hardware/software protection mechanisms prevent accidental writes.

What low-power modes are available on the HD64F3672FPV?

The HD64F3672FPV provides three configurable low-power modes: Sleep (CPU halted, peripherals active), Standby (CPU and all clocks stopped), and Subsleep (selected modules remain clocked). These modes are controlled through SYSCR1, SYSCR2, and MSTCR1 registers. Entry requires proper register setup and execution of STOP or SLEEP instructions. Wakeup sources include external interrupts, timer match events, and UART receive activity.

Is the HD64F3672FPV pin-compatible with other members of the H8/367x family?

Yes, the HD64F3672FPV is pin-compatible with HD64F3664FPV and HD64F3684FPV in the same 64-pin LQFP package. All share identical pin assignments for power, clock, reset, I/O ports, and peripheral signals. This allows hardware reuse across variants with different ROM/RAM capacities, simplifying design scaling and inventory management for manufacturers targeting multiple product tiers.

What development tools are supported for the HD64F3672FPV?

The HD64F3672FPV is supported by Renesas' H8S/H8/300 Series development ecosystem, including the High-Performance Embedded Workshop IDE, C/C++ compiler (REJ10B0058), and E7/E8 on-chip emulators. Debugging uses the NMI pin and reserved memory areas (H'4000–H'4FFF), with restrictions on accessing protected regions (H'F780–H'FB7F) during emulation. Application notes such as REJ05B0464 provide compiler-specific guidance.