Renesas DF38324WV

Overview

DF38324WV from Renesas Electronics is an 8-bit single-chip microcontroller in the H8/38327 Group, featuring an H8/300L Super Low Power 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 targets embedded control systems requiring low power consumption and high integration, such as industrial panel displays and appliance user interfaces.

For engineers reviewing the DF38324WV datasheet, DF38324WV pinout, DF38324WV application, or DF38324WV equivalent, this page delivers verified technical context, package mapping, functional pin roles, real-world use scenarios, and validated alternative options for design-in and supply continuity planning.

Technical Context

The DF38324WV implements the H8/300L CPU core with 16-bit internal data bus and 24-bit address space, supporting up to 16 MB addressing. It integrates system control functions including clock pulse generators (main/subclock), watchdog timer, and multiple power-saving modes (Sleep, Subsleep, Standby).

Peripheral integration includes a 10-bit A/D converter with 8 input channels, SCI with asynchronous/full-duplex capability, and LCD controller supporting up to 128 segments via static or multiplexed drive. The F-ZTAT™ flash enables in-system programming and supports ZTAT™-compatible boot code execution.

Key Specifications

Pinout & Package

DF38324WV is housed in an 80-pin Thin Fine-Pitch Plastic QFP (TFP-80C) package measuring 12 mm × 12 mm with 0.5 mm lead pitch. The package supports fine-pitch SMT assembly and provides full access to all on-chip peripherals including dual SCI interfaces, 14-bit PWM outputs, LCD segment/common drivers, and 10-bit A/D inputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DF38324WV, H8/38324R offers lower unit cost but zero field update capability, while R5F38324WNV provides architectural scalability at the expense of higher BOM cost and layout redesign - DF38324WV remains optimal for stable, cost-sensitive, low-power 8-bit control with LCD integration.

Availability

DF38324WV is available at Aetrix Electronics and suitable for industrial panel displays, home appliance user interfaces, portable test instruments, and smart energy meter interfaces requiring stable component supply and long-term manufacturing continuity.

Supply support for DF38324WV 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 headquartered in Japan, specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The DF38324WV belongs to the H8/38327 Group - a family of ultra-low-power 8-bit MCUs designed specifically for cost-sensitive embedded control applications with integrated LCD, A/D, and communication peripherals.

FAQ

What is the maximum operating frequency of the DF38324WV?

The DF38324WV operates at a maximum CPU clock frequency of 20 MHz when using the main system clock (XIN/XOUT oscillator). Its H8/300L core supports instruction execution at one cycle per instruction for most operations, delivering approximately 20 MIPS performance. This frequency is achievable across the full industrial temperature range (−40°C to +85°C) with proper decoupling and stable 5 V supply.

Does the DF38324WV support in-circuit debugging?

Yes, the DF38324WV supports on-chip debugging via its dedicated emulator interface. Pin P32 serves as RESO output during reset and is used for emulator synchronization. Pins P85–P87 are reserved for LCD segment output but must be disconnected from the display during debugging to avoid DC bias damage. The emulator uses on-chip memory regions H'E000–H'EFFF and H'F300–H'F6FF, which are inaccessible to user code during debug sessions.

What LCD configurations does the DF38324WV support?

The DF38324WV's integrated LCD controller supports static drive and multiplex ratios of 1/2 and 1/4, enabling up to 128 segments. It provides dedicated segment (SEG) and common (COM) output pins, with COM0–COM3 and SEG0–SEG127 mapped to specific port pins. Drive voltage is configurable via external resistors and capacitors on V1/V2/V3 pins, and contrast adjustment is supported through software-controlled bias settings.

How is flash memory programmed on the DF38324WV?

Flash programming on the DF38324WV is performed using the F-ZTAT™ (Flash Zero Turnaround Time) architecture, which allows in-system programming via the on-chip SCI interface or dedicated programming pins. The 64 KB flash is divided into blocks that can be erased independently, and programming is executed using standard Renesas flash programming algorithms - no external high-voltage programmer is required.

What are the key power-saving features of the DF38324WV?

The DF38324WV offers six operational modes: Active, Subactive, Watch, Standby, Subsleep, and Sleep. In Standby mode, current consumption drops below 1 μA at 5 V, with wake-up possible via external interrupt or RTC alarm. The subclock oscillator (32.768 kHz) remains active in Standby to maintain timekeeping, and RAM contents are retained. Wake-up time from Standby is typically 10 μs.