Renesas HD64F3694FPJE

Overview

HD64F3694FPJE from Renesas Technology 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 Timer A, Timer V, and multiple I/O ports. It operates at up to 16 MHz and supports multiple power-down modes (Sleep, Standby, Subsleep) for embedded control in industrial and consumer applications.

For engineers reviewing the HD64F3694FPJE datasheet, HD64F3694FPJE pinout, HD64F3694FPJE application, or HD64F3694FPJE equivalent, key selection considerations include its 100-pin PQFP package, on-chip flash programming capability via boot mode, interrupt handling with edge-selectable external inputs, and system clock flexibility with main and subclock generators.

Technical Context

The HD64F3694FPJE implements the H8/300H CPU architecture with 24-bit address space, supporting both little-endian memory layout and 16-bit data paths. Its system control includes SYSCR1/SYSCR2 registers for power-mode transitions and MSTCR1 for selective peripheral shutdown.

Peripheral integration includes Timer A (interval/clock time base/output), Timer V (pulse width/delay generation with TRGV input), and eight I/O ports (P1–P8, PB) with configurable pull-up, mode, and data control registers - all mapped into dedicated memory-mapped I/O address regions.

Key Specifications

Pinout & Package

This device uses a 100-pin Plastic Quad Flat Package (PQFP) with 0.5 mm pitch, compliant with JEDEC MS-026. Pin functions are defined per port group and peripheral assignment, with NC pins explicitly reserved and not to be connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HD64F3687FP and R5F100PLGFB, the HD64F3694FPJE uniquely combines Timer V's TRGV-synchronized pulse control with H8/300H binary compatibility, making it irreplaceable in legacy motor-control firmware where precise edge timing and minimal code changes are mandatory.

Availability

HD64F3694FPJE is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, building automation nodes, and consumer appliance UI systems requiring stable component supply across long-lifecycle programs.

Supply support for HD64F3694FPJE 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 Technology Corp. (now part of Renesas Electronics Corporation) is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and consumer markets.

The H8/3694 Group was designed for cost-sensitive, low-power embedded control applications requiring high reliability, on-chip flash programmability, and deterministic real-time response - especially where legacy H8/300 code reuse is essential.

FAQ

What is the maximum operating frequency of the HD64F3694FPJE?

The HD64F3694FPJE supports a maximum system clock frequency of 16 MHz, achievable using an external crystal (1–16 MHz), ceramic resonator, or direct clock input on the XIN pin. This frequency governs CPU execution speed, timer resolution, and peripheral timing - all specified under recommended operating conditions in the Electrical Characteristics section (page 85+ of Rev. 4.00 Hardware Manual). The HD64F3694FPJE maintains full functionality and timing guarantees only within this range.

Does the HD64F3694FPJE support in-system programming of its on-chip flash memory?

Yes, the HD64F3694FPJE supports in-system programming via two modes: Boot Mode (activated by setting specific pins at reset) and User Program Mode (enabled by writing to FLMCR1/FLMCR2 registers). Both allow erasing and reprogramming of flash blocks without removing the HD64F3694FPJE from the target board. Hardware and software protection mechanisms prevent accidental writes, and erase-verify cycles ensure data integrity after each operation.

Which power-down modes does the HD64F3694FPJE support, and how do they differ?

The HD64F3694FPJE supports four power-down modes: Sleep (CPU halted, peripherals active), Standby (CPU + most peripherals halted, RAM retained), Subsleep (only subclock running, RAM retained), and Subactive (subclock + selected modules active). Each mode is entered via SYSCR1/SYSCR2 register writes and offers progressively lower current draw - down to <10 µA in Standby - while preserving different levels of wake-up responsiveness and peripheral readiness. The HD64F3694FPJE's mode transitions are fully documented in Section 6 of the Hardware Manual.

Can the HD64F3694FPJE generate precise PWM waveforms with variable duty cycle and delay?

Yes, the HD64F3694FPJE's Timer V module enables precise PWM generation with arbitrary duty cycle and delay relative to an external trigger (TRGV input). Using TCORA/TCORB registers and TCRV0/TCSRV control bits, designers can configure pulse width, delay offset, and output polarity independently. This capability is validated in Application Example 11.5.1 and 11.5.2 of the Hardware Manual - a feature not replicated in lower-tier H8/36xx variants like the HD64F3687FP. The HD64F3694FPJE delivers this functionality without external components.

Is the HD64F3694FPJE pin-compatible with other members of the H8/3694 Group?

No - the HD64F3694FPJE is not universally pin-compatible across the H8/3694 Group. While it shares the same 100-pin PQFP package with variants like HD64F3694G, pin functions differ based on mask options and peripheral enablement (e.g., P85–P87 are reserved for E10T emulation and unusable in debug mode). The HD64F3694FPJE's pin mapping is unique to its specific mask version and must be verified against Section 1.3 (Pin Arrangement) and Section 1.4 (Pin Functions) of the Rev. 4.00 Hardware Manual.