Renesas HD64F3642AWV

Overview

HD64F3642AWV from Renesas Technology Corp. is an 8-bit single-chip microcontroller in the H8/300L Series, featuring the H8/300L CPU core with on-chip flash memory, 14-bit PWM, dual-channel serial interface (SCI), and 10-bit A/D converter. It operates at up to 10 MHz, supports 5 V or 2.5 V supply, and targets embedded control applications requiring integrated analog and digital peripherals.

For engineers reviewing the HD64F3642AWV datasheet, HD64F3642AWV pinout, HD64F3642AWV application, or HD64F3642AWV equivalent, key selection criteria include flash-based programmability, low-power sleep modes (down to 1 mA), SCI3 timing compliance at 2.5–5.5 V, and compatibility with H8/300L instruction set for legacy code reuse.

Technical Context

The HD64F3642AWV implements the H8/300L CPU architecture with full instruction set compatibility to the H8/300, supporting 16-bit addressing and 8/16-bit data operations. Its memory map includes 64 KB address space, with on-chip flash (up to 64 KB) and RAM (up to 4 KB), managed via FLMCR and EBR registers for block erase and program-verify control.

Peripheral integration includes five timers (one 16-bit free-run, two 16-bit input capture/output compare, one 8-bit prescaler, one watchdog), a 14-bit PWM generator with dead-time insertion, and dual SCI modules (SCI1 and SCI3) supporting asynchronous communication with baud rate generation via BRR and BRC registers.

Key Specifications

Pinout & Package

HD64F3642AWV is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package. Pin functions are defined per the H8/3644 Group hardware manual Rev. 6.00, with dedicated ports, timer I/O, SCI signals, A/D inputs, and flash control pins.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with HD64F3642AWV, HD64F3643AWV adds ROM for secure boot but reduces flash flexibility, while HD64F3644AWV expands analog and timing resources at identical footprint-making HD64F3642AWV optimal for cost-sensitive, mid-complexity embedded control where 8 A/D channels and dual SCI meet requirements.

Availability

HD64F3642AWV is available at Aetrix Electronics and suitable for industrial motor control, home appliance MCU, automotive body electronics, and PLC I/O subsystems requiring stable component supply across long-lifecycle production programs.

Supply support for HD64F3642AWV 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 H8/3642A F-ZTAT™ product line was designed for cost-effective, flash-based 8-bit control in resource-constrained embedded systems requiring mixed-signal integration and low-power operation.

FAQ

What is the maximum operating frequency of the HD64F3642AWV?

The HD64F3642AWV supports a maximum system clock frequency of 10 MHz when powered at VCC = 5 V. At VCC = 2.5 V, the maximum rated frequency is reduced to maintain timing margins and power integrity. This specification is confirmed in Section 13.2.4 (DC Characteristics) and Table 13.6 of the H8/3644 Group Hardware Manual Rev. 6.00. The HD64F3642AWV uses an internal prescaler chain to derive peripheral clocks, allowing consistent operation across its supported voltage range.

Does the HD64F3642AWV include on-chip flash memory, and what is its capacity?

Yes, the HD64F3642AWV integrates 64 KB of on-chip flash memory using Renesas' F-ZTAT™ technology. This flash supports in-system programming, block erase, and program-verify operations via dedicated registers (FLMCR, EBR1, EBR2). The memory is organized to allow simultaneous execution and programming, and it replaces mask ROM in earlier variants like HD6433642. HD64F3642AWV flash is explicitly referenced in Section 6.4 and Section 6.8 of the hardware manual.

What serial communication interfaces does the HD64F3642AWV support?

The HD64F3642AWV features two independent Serial Communication Interface (SCI) modules: SCI1 and SCI3. Both support asynchronous full-duplex communication with programmable baud rates, parity, stop bits, and framing error detection. SCI3 specifically supports clock sources of φ/4, φ/16, and φ/64, enabling baud rates up to 1 Mbps under 10 MHz operation. These interfaces are documented in Sections 10.3 and 13.2.5 of the hardware manual.

How many analog-to-digital converter (A/D) input channels does the HD64F3642AWV provide?

The HD64F3642AWV includes a 10-bit successive-approximation A/D converter with 8 input channels (AD0–AD7), mapped to PORT5 and PORT6 pins. It supports both internal (2.5 V) and external (AVCC) reference voltages, and conversions can be triggered by software, timer overflow, or external events. This configuration is specified in Section 9.2 and Table 13.6 of the H8/3644 Group Hardware Manual Rev. 6.00.

What power-saving modes are available on the HD64F3642AWV?

The HD64F3642AWV implements seven power-down modes: Sleep, Standby, Watch, Subsleep, Subactive, Active (Medium-Speed), and Direct Transfer. Sleep mode draws ≤3 mA at 2.5 V/10 MHz, while Standby reduces current to ≤7 µA. Wake-up sources include external interrupts, timer matches, and A/D completion. These modes and their current specifications are detailed in Sections 5.1–5.8 and Table 13.6 of the hardware manual.