Renesas M38002E2FP

Overview

M38002E2FP from Renesas Electronics is an 8-bit CMOS single-chip microcomputer in the 3800 Group, featuring 24 KB mask ROM, 512-byte RAM, four 8-bit timers, UART or clock-synchronous serial I/O, and operation at up to 10 MHz with a 5 V supply. It targets embedded control in industrial equipment, office automation devices, and consumer electronics requiring deterministic real-time response.

For engineers reviewing the M38002E2FP datasheet, M38002E2FP pinout, M38002E2FP application, or M38002E2FP equivalent, key selection criteria include its 64-pin plastic QFP package (64P6N-A), mask ROM program retention, integrated watchdog timer, and support for single-chip mode without external memory.

Technical Context

The M38002E2FP implements the MELPS 740 CPU core with 16-bit address bus and 8-bit data bus, executing instructions in 1–4 cycles depending on opcode and addressing mode. It integrates a programmable clock generating circuit supporting XIN/XOUT crystal or external clock input, and supports both single-chip and memory expansion modes via dedicated control pins.

Interrupt handling uses a priority-encoded vector table with 16 interrupt sources including timer overflows, serial I/O events, and external INT pins. The CPU includes a processor status register with carry, zero, sign, and interrupt mask flags, and supports stack operations with automatic push/pop during interrupts and subroutine calls.

Key Specifications

Pinout & Package

Package: 64-pin plastic quad flat package (64P6N-A), 14 mm × 14 mm body, 0.8 mm lead pitch, surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M38002E2FP, the M38003M6-XXXFP offers expanded memory for larger applications while maintaining pin and code compatibility, whereas the HD64F38002F provides identical functionality under Renesas' current naming convention - both serve as validated alternatives without requiring hardware redesign.

Availability

M38002E2FP is available at Aetrix Electronics and suitable for industrial control panels, office equipment controllers, and consumer appliance UIs requiring stable component supply and long-term manufacturing continuity.

Supply support for M38002E2FP 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 markets.

The 3800 Group microcontrollers were designed for cost-sensitive, high-reliability embedded control applications in commercial and industrial equipment - emphasizing deterministic timing, low-power operation, and robust I/O integration.

FAQ

What is the memory configuration of the M38002E2FP?

The M38002E2FP contains 24 KB of mask ROM for program storage and 512 bytes of on-chip RAM for data and stack operations. It does not include EEPROM or flash memory, and relies on factory-programmed ROM for firmware. This configuration supports fixed-function embedded applications where code stability and security are prioritized over field updates. The M38002E2FP uses a Harvard architecture with separate buses for instruction and data access.

Does the M38002E2FP support external memory expansion?

Yes, the M38002E2FP supports memory expansion mode via dedicated control pins (e.g., RD, WR, CS), enabling connection to external ROM, RAM, or peripherals using its 16-bit address and 8-bit data bus. However, it is typically deployed in single-chip mode - eliminating external memory - leveraging its 24 KB mask ROM and 512-byte RAM. Memory expansion is reserved for applications needing >24 KB code or additional data space beyond on-chip limits.

What package type is used for the M38002E2FP?

The M38002E2FP is packaged in a 64-pin plastic quad flat package (64P6N-A), measuring 14 mm × 14 mm with 0.8 mm lead pitch. This surface-mount package is RoHS-compliant and designed for reflow soldering. Pin compatibility is maintained across the 3800 Group's 64-pin variants, including M38002M4-XXXFP and M38003M6-XXXFP, allowing layout reuse in family-based designs.

Is the M38002E2FP suitable for automotive applications?

No, the M38002E2FP is classified as a Renesas Standard-grade device, rated for −20 °C to +75 °C operation and intended for computers, office equipment, industrial robots, and consumer appliances. It is not qualified to AEC-Q100 or automotive reliability standards. For automotive use, Renesas offers High Quality-grade microcontrollers such as those in the RL78/F1x or RH850 families - the M38002E2FP must not be deployed in safety-critical or vehicle-mounted systems without explicit written consent from Renesas.

How does the watchdog timer function in the M38002E2FP?

The M38002E2FP includes an on-chip watchdog timer that triggers a system reset if not cleared within its timeout period - typically configured via internal prescaler settings. The watchdog is enabled by default after reset and must be serviced regularly in firmware to prevent unintended resets. Its independence from the main CPU clock enhances reliability in fault-prone environments. This feature is critical for unattended systems like vending machines or remote sensors where software hangs must be autonomously recovered.