Renesas DF38347HV

Overview

DF38347HV 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 Flash (F-ZTAT™), 4 KB RAM, and integrated peripherals including 14-bit PWM, 10-channel 10-bit A/D converter, SCI, LCD controller/driver, and six timers. It targets low-power embedded control applications such as industrial sensors and appliance motor control.

For engineers reviewing the DF38347HV datasheet, DF38347HV pinout, DF38347HV application, or DF38347HV equivalent, key selection criteria include its F-ZTAT Flash architecture, 100-pin TFP-100G package with P24 pull-up MOS behavior during reset, and support for sub-sleep/standby power-down modes down to 0.7 µA.

Technical Context

The DF38347HV implements the H8/300L Super Low Power CPU core with 16-bit ALU, 24-bit address space, and Harvard-style memory architecture. It supports four power-down modes-sleep, sub-sleep, standby, and watch-with hardware-controlled entry/exit and configurable wake-up sources including external interrupts and timer compare matches.

Its peripheral set includes a 10-channel 10-bit successive-approximation A/D converter with sample-and-hold, dual SCI modules supporting asynchronous communication at up to 2 Mbps, and an LCD controller/driver capable of driving up to 160 segments. The on-chip F-ZTAT Flash enables in-system programming with 100,000 write/erase cycles and data retention exceeding 20 years.

Key Specifications

Pinout & Package

DF38347HV is housed in a 100-pin TFP-100G (Thin Fine-Pitch Ball Grid Array) package, measuring 10 mm × 10 mm with 0.5 mm ball pitch and standard JEDEC MO-220 footprint. The package supports automated reflow assembly and offers thermal performance suitable for industrial ambient temperatures up to +85°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DF38347HV, R5F38347MDFP trades BGA miniaturization for LQFP ease-of-use, while H8/38447R sacrifices Flash flexibility for marginal clock speed gain and lower cost - making DF38347HV optimal for upgradable, space-constrained industrial control.

Availability

DF38347HV is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance control systems, and energy meter front-ends requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for DF38347HV 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 connectivity solutions for industrial, automotive, and IoT applications.

The H8/38347 Group, including DF38347HV, was designed for ultra-low-power embedded control in resource-constrained environments - emphasizing integrated peripherals, Flash-based firmware agility, and industrial-grade reliability.

FAQ

What is the maximum operating frequency of the DF38347HV?

The DF38347HV operates at a maximum CPU clock frequency of 16 MHz when powered at 5.0 V. At 3.3 V, the guaranteed maximum is 12 MHz per electrical characteristics in the H8/38347 Group Hardware Manual Rev. 6.00. This frequency governs instruction execution speed, A/D conversion rate, and PWM resolution - all critical for real-time motor control loops in the DF38347HV.

Does the DF38347HV support in-circuit debugging without external hardware?

Yes, the DF38347HV includes an on-chip emulator that supports full debugging via the dedicated P24–P27 pins. However, P24 is reserved exclusively for emulator use during debug sessions, and P25–P27 are unavailable for general I/O unless additional hardware is installed on the target board - a constraint explicitly documented in the DF38347HV Hardware Manual.

What is the purpose of the P24 pin's pull-up MOS in the DF38347HV?

In the DF38347HV F-ZTAT version, the on-chip pull-up MOS for pin P24 is automatically enabled during reset and turns off after reset clearance. This behavior is hardware-controlled and cannot be modified by software. It ensures predictable pin state at power-up but requires careful external circuit design to avoid contention - a verified characteristic confirmed in Section 8.3.1 of the DF38347HV Hardware Manual.

Can the DF38347HV drive an LCD directly without external components?

Yes, the DF38347HV integrates a full LCD controller/driver capable of driving up to 160 segments (e.g., 20 commons × 8 segments) with internal bias voltage generation. No external resistors, capacitors, or bias ICs are required - this functionality is confirmed in the "LCD Controller/Driver" section of the DF38347HV Hardware Manual and applies specifically to the DF38347HV variant.

What power-down modes does the DF38347HV support, and what are their typical current draws?

The DF38347HV supports four power-down modes: Sleep (0.7 µA), Sub-sleep (1.2 µA), Standby (0.7 µA), and Watch (1.5 µA), all measured at VCC = 3.3 V and TA = 25°C. These values are specified in Table 15.26 of the DF38347HV Hardware Manual and reflect actual silicon measurements - enabling accurate battery-life estimation for portable DF38347HV-based designs.