Renesas DF38324WWV

Overview

DF38324WWV from Renesas Electronics is an 8-bit single-chip microcontroller in the H8/38327 Group, featuring an H8/300L CPU core, 64 KB on-chip F-ZTAT™ flash memory, 4 KB RAM, and integrated peripherals including 14-bit PWM, SCI, 10-bit A/D converter, LCD controller/driver, and six timers. It operates at up to 20 MHz and targets low-power embedded control applications such as industrial panel displays and appliance user interfaces.

For engineers reviewing the DF38324WWV datasheet, DF38324WWV pinout, DF38324WWV application, or DF38324WWV equivalent, key selection considerations include its F-ZTAT™ flash architecture for field reprogrammability, LCD driver capability supporting up to 128 segments, and support for multiple low-power modes (Subsleep, Standby, Watch) with fast wake-up response.

Technical Context

The DF38324WWV implements the H8/300L instruction set with 16-bit address bus and 24-bit linear addressing space, enabling access to up to 16 MB of external memory. Its clock system supports dual oscillators: main system clock (up to 20 MHz via crystal or external source) and subclock (32.768 kHz) for real-time functions and low-power operation.

Peripheral integration includes a 10-bit, 8-channel successive-approximation A/D converter with internal reference voltage, full-duplex SCI with framing and parity error detection, and an LCD controller supporting static to 1/4-duty drive with built-in bias generation and charge pump - all directly managed by dedicated on-chip modules without CPU intervention.

Key Specifications

Pinout & Package

DF38324WWV is housed in an 80-pin TFP-80C package (12 mm × 12 mm, 0.5 mm pitch), optimized for thermal performance and board space efficiency in industrial control modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DF38324WWV, H8/38324R offers lower cost but zero field update flexibility, while R5F38324WNNP provides architectural headroom at the expense of increased layout complexity and software migration effort.

Availability

DF38324WWV is available at Aetrix Electronics and suitable for industrial panel displays, home appliance user interfaces, smart meter front panels, and non-life-support medical device displays requiring stable component supply and long-term lifecycle support.

Supply support for DF38324WWV 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 applications.

The H8/38327 Group, including DF38324WWV, was designed for cost-sensitive, low-power embedded control systems requiring integrated LCD driving, analog sensing, and field-upgradable firmware - targeting appliance, industrial HMI, and metering markets.

FAQ

What is the maximum operating frequency of the DF38324WWV?

The DF38324WWV supports a maximum system clock frequency of 20 MHz, delivering up to 13.3 MIPS performance. This timing is achievable using either an external crystal (1–20 MHz) connected to XTAL1/XTAL2 or an external clock source. The internal clock generator includes prescalers and PLL-like multiplication for flexible clock tree configuration, and the DF38324WWV maintains full peripheral functionality-including LCD driving and A/D conversion-at this maximum rate.

Does the DF38324WWV include an integrated LCD controller, and what drive types does it support?

Yes, the DF38324WWV integrates a fully autonomous LCD controller supporting static, 1/2-duty, 1/3-duty, and 1/4-duty drive methods with up to 128 segments. It includes an internal charge pump and programmable bias generator, eliminating external components for most segment LCDs. The controller operates independently of the CPU core, allowing background refresh while the DF38324WWV executes application code - critical for low-power display retention.

What type of on-chip memory does the DF38324WWV use, and is it field-programmable?

The DF38324WWV uses 64 KB of on-chip F-ZTAT™ flash memory, a Renesas proprietary technology enabling single-power (3.3 V) in-system programming without high-voltage pulses or UV erasure. This makes the DF38324WWV field-upgradable via standard serial interfaces like SCI. Unlike mask ROM variants, the DF38324WWV retains full flash functionality throughout its lifetime, supporting firmware patches, calibration updates, and feature enhancements post-deployment.

What low-power modes are available on the DF38324WWV, and what is the lowest current consumption?

The DF38324WWV offers five low-power modes: Subactive, Watch, Standby, Subsleep, and Sleep. In Subsleep mode - which retains RTC operation, key-wakeup capability, and RAM contents - typical current consumption is ≤1.5 µA at 3.3 V and 25°C. This ultra-low state is enabled by dedicated low-leakage circuitry and selective clock gating, making the DF38324WWV suitable for battery-powered devices requiring multi-year operation without recharge or replacement.

Is the DF38324WWV pin-compatible with other members of the H8/38327 Group?

Yes, the DF38324WWV shares identical pinout and package (TFP-80C) with all members of the H8/38327 Group, including H8/38322, H8/38323, H8/38325, H8/38326, and H8/38327. Differences between these variants lie solely in memory configuration (ROM type and size), clock options, and minor peripheral enablement - not in physical layout or electrical pin behavior. This allows hardware reuse across firmware variants during product family scaling.