Renesas DF38347WV

Overview

DF38347WV from Renesas Electronics is an 8-bit single-chip microcontroller in the H8/38347 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, 8-channel 10-bit A/D converter, SCI serial interface, LCD controller/driver, and six timers. It targets embedded control systems requiring low power consumption and high integration, such as industrial panel meters and appliance motor controllers.

For engineers reviewing the DF38347WV datasheet, DF38347WV pinout, DF38347WV application, or DF38347WV equivalent, this page provides verified technical context, package mapping to TFP-100G (100-pin thin fine-pitch QFP), confirmed pin functions for P24 pull-up behavior in reset, real-world use cases in battery-powered instrumentation, and two validated alternative MCUs with documented functional alignment and key trade-offs.

Technical Context

The DF38347WV 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 logic for four power-down modes - Sleep, Subsleep, Standby, and Watch - with subclock (32.768 kHz) support for RTC operation during low-power states.

Peripheral integration includes a 14-bit PWM module with dead-time insertion capability, an 8-channel 10-bit successive-approximation A/D converter with sample-and-hold, and an SCI interface compatible with UART protocols. The on-chip LCD controller supports up to 128 segments and includes built-in bias generation and COM/SEG drivers.

Key Specifications

Pinout & Package

DF38347WV is housed in the TFP-100G package: 100-pin thin fine-pitch QFP with exposed thermal pad, 0.5 mm lead pitch, and 14 mm × 14 mm body size. Pin functions are defined per Renesas Hardware Manual Rev.6.00 (2006), with P24 exhibiting on-chip pull-up MOS activation only during reset in F-ZTAT versions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DF38347WV, R5F38347WV offers identical functionality under updated branding, while H8/38447R trades Flash flexibility for lower unit cost and higher security against firmware tampering - making DF38347WV optimal for development, prototyping, and applications requiring post-deployment updates.

Availability

DF38347WV is available at Aetrix Electronics and suitable for industrial panel meters, appliance motor controllers, portable data loggers, and building automation sensor nodes requiring stable component supply across long product lifecycles.

Supply support for DF38347WV 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 Japanese semiconductor manufacturer formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions for industrial and automotive markets.

The DF38347WV belongs to the H8/38347 Group within the H8/300L Super Low Power Series, designed specifically for cost-sensitive, battery-operated embedded control applications demanding high peripheral integration and ultra-low standby current.

FAQ

What is the maximum operating frequency of the DF38347WV?

The DF38347WV supports a maximum system clock frequency of 20 MHz when using an external crystal oscillator. Its H8/300L CPU core executes most instructions in one or two clock cycles, delivering up to 20 MIPS performance. The device does not include an internal PLL, so clock scaling relies on prescaler division of the main oscillator signal. This makes DF38347WV well-suited for deterministic real-time tasks in industrial control where jitter-free timing is critical.

Does DF38347WV support in-system programming of its Flash memory?

Yes, DF38347WV features 64 KB of F-ZTAT™ Flash memory that supports full in-system programming via its on-chip serial interface - no external programmer is required. Firmware updates can be performed using the built-in bootloader or user-developed routines, enabling remote field upgrades and calibration adjustments. This capability is intrinsic to the F-ZTAT architecture and is confirmed in Renesas Hardware Manual Rev.6.00 Section 1.1 and Table 15.26.

What are the power supply requirements for DF38347WV?

DF38347WV requires a nominal 5 V ±10% supply across two dedicated VCC pins (VCC1 and VCC2) and multiple VSS ground connections. The device specifies operating voltage range from 4.5 V to 5.5 V, with guaranteed functionality down to 4.0 V in reduced-performance mode. Current consumption varies by mode: 15 mA active (20 MHz), 1.2 µA in Sleep, and 0.5 µA in Standby - all measured per Renesas DC Characteristics Table 15.26.

Is DF38347WV pin-compatible with other members of the H8/38347 Group?

Yes, DF38347WV shares identical pinout and package (TFP-100G) with all variants in the H8/38347 Group, including DF38342, DF38343, DF38344, DF38345, and DF38346. Differences between these parts lie solely in memory configuration (Flash size, RAM size) and factory-programmed options - not in pin assignment, electrical characteristics, or peripheral register layout. This allows drop-in replacement during design iteration or volume production ramp.

What debugging interfaces does DF38347WV support?

DF38347WV supports on-chip debugging via dedicated pins P24–P27, which form a proprietary debug interface compatible with Renesas E8/E8a emulators and High-Performance Embedded Workshop. During debug mode, P24 functions as bidirectional I/O, while P25–P27 serve as dedicated input/output lines - and cannot be used for application I/O unless external hardware is added per Hardware Manual Section 1.3.2.