Renesas DF38002FP4V

Overview

DF38002FP4V from Renesas Electronics is an 8-bit single-chip microcontroller in the H8/3802 Group, featuring a 16 MHz H8/300L CPU core, 16 KB mask ROM, 1 KB RAM, and integrated peripherals including 10-bit × 4-channel ADC, UART (SCI), LCD controller (25 seg × 4 com), and multiple timers. It targets low-power embedded control in industrial and consumer equipment.

For engineers reviewing the DF38002FP4V datasheet, DF38002FP4V pinout, DF38002FP4V application, or DF38002FP4V equivalent, key selection considerations include its FP-64A 64-pin QFP package, –20 to +75°C operating temperature range, 4.5–5.5 V supply, on-chip WDT, and support for external interrupt wakeup with 11 sources.

Technical Context

The DF38002FP4V implements the H8/300L CPU architecture with instruction set compatibility to the H8/300, enabling legacy code reuse. It integrates system-control modules including power-on reset (POR) and low-voltage detection (LVD), alongside peripheral modules such as Timer A (clock), Timer F (compare), AEC timer, and SCI with UART/clock frequency modes.

Its memory map allocates 16 KB of on-chip mask ROM for program storage and 1 KB of RAM for data, with dedicated register space for peripheral control. The device supports single-supply operation at 4.5–5.5 V and delivers stable timing via internal clock generation or external crystal/resonator input on OSC1/OSC2 pins.

Key Specifications

Pinout & Package

DF38002FP4V is housed in a 64-pin plastic quad flat package (FP-64A), measuring 14 mm × 14 mm with 0.8 mm lead pitch. This RoHS-compliant surface-mount package supports automated assembly and provides thermal and mechanical reliability for industrial environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DF38002FP4V, H8/38004FP4V offers field-upgradable firmware at the cost of higher active current and no POR, while H8/38002SFP4V delivers extended temperature and low-voltage operation but requires redesign of power delivery and thermal management.

Availability

DF38002FP4V is available at Aetrix Electronics and suitable for industrial control panels, home appliance controllers, portable test instruments, and energy meter display modules requiring stable component supply across multi-year production cycles.

Supply support for DF38002FP4V 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 industrial, automotive, and enterprise applications.

The DF38002FP4V belongs to the H8/3802 Group - a family of 8-bit MCUs designed for cost-effective, low-power embedded control in consumer and industrial equipment where reliability, integration, and long-term supply stability are critical.

FAQ

What is the maximum operating frequency of the DF38002FP4V?

The DF38002FP4V supports a maximum operating frequency of 16 MHz when powered at 4.5–5.5 V. This frequency is achieved using either an external crystal/resonator on OSC1/OSC2 or the internal oscillator circuit. At this speed, the H8/300L CPU executes instructions with a minimum cycle time of 62.5 ns, enabling responsive real-time control in applications like appliance motor sequencing or sensor polling. DF38002FP4V performance remains stable across its specified industrial temperature range.

Does the DF38002FP4V include a power-on reset (POR) circuit?

No, the DF38002FP4V does not integrate a power-on reset (POR) circuit. Unlike later variants such as the H8/38004FP4V or H8/38002SFP4V, the DF38002FP4V relies on external reset supervision or the use of its built-in low-voltage detection (LVD) module configured for reset output. System designers must implement an external RC-based or dedicated reset IC solution to ensure reliable initialization during power ramp-up. DF38002FP4V's absence of POR is documented in the H8/3802 Group hardware manual revision 7.00.

What package type and pin count does the DF38002FP4V use?

The DF38002FP4V is packaged in a 64-pin plastic quad flat package designated FP-64A. This RoHS-compliant surface-mount package measures 14 mm × 14 mm with 0.8 mm lead pitch and features gull-wing leads for standard reflow soldering. The FP-64A footprint is shared across the H8/3802, H8/38004, and H8/38002S groups, enabling layout reuse where peripheral and voltage requirements align. DF38002FP4V's pinout includes dedicated ADC inputs, SCI signals, LCD drivers, and general-purpose I/O distributed across eight 8-bit ports.

Can the DF38002FP4V operate from a 3.3 V supply?

No, the DF38002FP4V is specified only for 4.5–5.5 V operation and cannot reliably function at 3.3 V. Its internal logic, flash programming voltage margins, and peripheral drivers (especially the LCD controller and ADC reference) are designed for 5 V nominal supply. Attempting 3.3 V operation risks undefined behavior, failed resets, or incomplete peripheral initialization. For 3.3 V systems, consider the pin-compatible H8/38002SFP4V variant, which supports 2.7–3.6 V and is explicitly qualified for that range. DF38002FP4V must be used with a regulated 5 V rail.

Is the DF38002FP4V supported by Renesas' E1/E20 debug tools?

Yes, the DF38002FP4V supports on-chip debugging via Renesas' E1 emulator and High-performance Embedded Workshop IDE using its dedicated debug pins (P95/TCK, P33/TDO, P34/TDI, P35/TMS). However, note that during debug session, P95 is reserved exclusively for TCK and unavailable as GPIO, and pins P33–P35 are repurposed for JTAG signaling. DF38002FP4V does not require external debug probes for basic programming and breakpoint debugging, reducing development tool cost and board space. Full debug functionality requires correct SWD/JTAG signal routing per the hardware manual.