Renesas HD64F3694FPJV

Overview

HD64F3694FPJV 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 HD64F3694FPJV datasheet, HD64F3694FPJV pinout, HD64F3694FPJV application, or HD64F3694FPJV equivalent, key selection criteria include its 20 MHz max CPU frequency, 64 KB ROM/4 KB RAM memory configuration, 80-pin PQFP package, low-power sleep/standby modes, and support for on-board programming via single power supply F-ZTAT™.

Technical Context

The HD64F3694FPJV implements the H8/300H CPU architecture with 16-bit data bus and 24-bit address space, supporting both big-endian and little-endian operation modes. It integrates system control modules (clock generators, reset circuitry, power-down controllers), on-chip peripheral modules (UART, 16-bit timers with capture/compare, watchdog timer), and memory management units for ROM/RAM mapping.

Its clock system includes dual oscillators: a main system clock generator supporting crystal (1–20 MHz), ceramic resonator, or external clock input, and a subclock generator for 32.768 kHz real-time clock operation. Power management supports four low-power modes - Sleep, Standby, Subsleep, and Subactive - each with configurable peripheral retention and wake-up sources.

Key Specifications

Pinout & Package

HD64F3694FPJV is housed in an 80-pin PQFP (Plastic Quad Flat Package) with 0.65 mm lead pitch and 14 mm × 14 mm body size. Pin functions are defined per the H8/3694 Group Hardware Manual Rev.5.00 (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 HD64F3694FPJV, HD64F3687FP offers reduced memory and peripherals at lower cost for simpler applications, while R5F100PLGFB provides significantly higher integration and efficiency but requires PCB redesign and firmware porting.

Availability

HD64F3694FPJV is available at Aetrix Electronics and suitable for industrial motor control, home appliance controllers, point-of-sale terminals, and building automation sensor nodes requiring stable component supply across long-lifecycle production programs.

Supply support for HD64F3694FPJV 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 manufacturer specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The H8/3694 Group - including HD64F3694FPJV - was designed for cost-effective, low-power embedded control in consumer and industrial equipment, emphasizing code compatibility, on-chip debug, and single-supply flash programming.

FAQ

What is the maximum operating frequency of the HD64F3694FPJV?

The HD64F3694FPJV supports a maximum CPU operating frequency of 20 MHz when driven by an external crystal or resonator connected to the XIN/XOUT pins. This frequency defines the upper limit for instruction execution speed, peripheral timing resolution, and real-time response capability in applications such as motor control or sensor polling. The HD64F3694FPJV achieves this performance while maintaining compatibility with the H8/300 instruction set and operating within standard 5 V supply conditions.

Does the HD64F3694FPJV support in-system programming?

Yes, the HD64F3694FPJV supports in-system programming via its on-chip flash memory and the F-ZTAT™ protocol, enabling reprogramming using only a single 5 V supply. This capability eliminates the need for external UV erasers or dedicated programming hardware and allows firmware updates directly in the target application environment. The HD64F3694FPJV's flash control registers (FLMCR1, FLMCR2, FENR) and erase block management ensure safe, sector-wise rewrites without disrupting system operation.

What package type is used for the HD64F3694FPJV?

The HD64F3694FPJV is packaged in an 80-pin Plastic Quad Flat Package (PQFP) with 0.65 mm lead pitch and a 14 mm × 14 mm body size. This package is RoHS-compliant and optimized for surface-mount assembly in industrial and consumer electronics manufacturing. The HD64F3694FPJV's pin arrangement follows the standardized H8/3694 Group layout, ensuring mechanical and thermal compatibility with existing reflow profiles and test fixtures used for similar Renesas microcontrollers.

How many I/O pins does the HD64F3694FPJV provide?

The HD64F3694FPJV provides 63 general-purpose CMOS I/O pins distributed across eight port groups (P0–P7), each with individual direction and pull-up control. These pins support multiple functions including digital input/output, external interrupt triggering, timer input capture, and UART communication. The HD64F3694FPJV's I/O architecture allows flexible peripheral mapping and real-time signal conditioning without requiring external glue logic, making it suitable for compact embedded control designs.

What low-power modes are supported by the HD64F3694FPJV?

The HD64F3694FPJV supports four distinct low-power modes - Sleep, Standby, Subsleep, and Subactive - each offering different levels of peripheral retention and wake-up latency. In Subsleep mode, the HD64F3694FPJV maintains RAM contents and selected timer functionality while drawing less than 10 µA, ideal for battery-powered sensor nodes. Wake-up sources include external interrupts, timer overflows, and UART activity, all configurable via SYSCR1, SYSCR2, and MSTCR1 registers.