Renesas HD64F3694GFPIV

Overview

HD64F3694GFPIV from Renesas Electronics is a 16-bit single-chip microcomputer in the H8/3694 Group, featuring the H8/300H CPU core with 16 MB address space, 32 KB on-chip flash ROM, and 2 KB RAM. It supports multiple power-down modes (Sleep, Standby, Subsleep, Subactive), operates at up to 20 MHz, and targets embedded control in industrial equipment and office automation systems.

For engineers reviewing the HD64F3694GFPIV datasheet, HD64F3694GFPIV pinout, HD64F3694GFPIV application, or HD64F3694GFPIV equivalent, key selection criteria include its 80-pin PQFP package, integrated flash programming capability, subclock oscillator support for real-time functions, and compatibility with H8/300H instruction set for legacy code reuse.

Technical Context

The HD64F3694GFPIV implements the H8/300H CPU architecture with full backward compatibility to the H8/300 instruction set, enabling migration from earlier designs. It integrates system control modules including clock pulse generators (main and subclock), prescalers (S and W), and power-down mode controllers (SYSCR1/SYSCR2/MSTCR1).

Peripheral integration includes on-chip flash memory with FLMCR1/FLMCR2 control registers, erase block management (EBR1), and flash power control (FLPWCR). The device supports external interrupt handling via IEGR1/IEGR2 and IENR1/IRR1 registers, with configurable edge detection and vector-based exception processing.

Key Specifications

Pinout & Package

HD64F3694GFPIV is housed in an 80-pin Plastic Quad Flat Package (PQFP) with 0.65 mm lead pitch, compliant with JEDEC MS-026. The package supports reflow soldering and provides mechanical stability for industrial temperature operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HD64F3694GFPIV, the HD64F3687FV offers reduced memory and pin count for cost-sensitive designs, while the HD64F3692FV removes subclock support to simplify crystal BOM - both require firmware validation due to peripheral register mapping differences despite core compatibility.

Availability

HD64F3694GFPIV is available at Aetrix Electronics and suitable for industrial motor control, office equipment firmware, and building automation panels requiring stable component supply across extended product lifecycles.

Supply support for HD64F3694GFPIV 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.

The H8/3694 Group was designed for cost-effective, low-power embedded control in industrial and office equipment - emphasizing flash programmability, multiple sleep modes, and H8/300H software compatibility.

FAQ

What is the maximum operating frequency of the HD64F3694GFPIV?

The HD64F3694GFPIV operates at a maximum frequency of 20 MHz when powered at 5 V. This frequency is achieved using the on-chip main clock generator with an external crystal or ceramic resonator connected to the X1/X2 pins. The device's timing specifications guarantee correct instruction execution and peripheral operation up to this rate, with setup/hold times validated across industrial temperature range (−20°C to +75°C). HD64F3694GFPIV maintains full functionality including flash programming and interrupt response at rated speed.

Does the HD64F3694GFPIV support in-system programming?

Yes, the HD64F3694GFPIV supports in-system programming via its on-chip boot-mode serial interface. When configured in boot mode (using specific pin states at reset), it accepts flash memory programming commands over UART-compatible signals, enabling firmware updates without removing the device from the PCB. HD64F3694GFPIV implements full block erase and byte-write capabilities under FLMCR1/FLMCR2 register control, with write-cycle timing fully specified in the hardware manual.

What power management modes does the HD64F3694GFPIV offer?

The HD64F3694GFPIV provides four distinct power-down modes: Sleep, Standby, Subsleep, and Subactive. Each mode disables different clock domains and peripheral blocks to achieve current draws ranging from 1.5 mA (Sleep) to 10 µA (Standby). Wake-up sources include external interrupts, subclock alarms, and watchdog timeouts. HD64F3694GFPIV retains RAM contents and register states across all modes except full reset, supporting rapid resumption of real-time tasks.

Is the HD64F3694GFPIV pin-compatible with other H8/3694 family members?

No, the HD64F3694GFPIV is not universally pin-compatible across the H8/3694 family. While it shares the 80-pin PQFP package with variants like HD64F3692FV, pin functions differ - notably, HD64F3694GFPIV includes dedicated X1/X2 subclock oscillator pins absent in HD64F3692FV. HD64F3694GFPIV also reserves P85–P87 for emulator use, whereas other variants may assign them differently. Always verify pin function mapping against the specific variant's hardware manual before substitution.

What development tools are supported for the HD64F3694GFPIV?

The HD64F3694GFPIV is supported by Renesas' legacy H8S/H8/300 development ecosystem, including the High-Performance Embedded Workshop 3 IDE, H8/300H Series C/C++ Compiler (REJ10B0058), and E7/E8 on-chip emulators. Debugging requires adherence to hardware constraints: NMI, P85–P87, and memory regions H'7000–H'7FFF and H'F780–H'FB7F are reserved during emulation. HD64F3694GFPIV firmware can also be developed using GNU-based toolchains targeting the H8/300H ISA with appropriate linker scripts.