Renesas M38067ECAFP

Overview

M38067ECAFP from Renesas Electronics is an 8-bit CMOS single-chip microcomputer in the 38000 Series (740 Family), featuring 24 KB mask ROM, 512-byte RAM, 13-channel 8-bit A/D converter, dual UART/clock-synchronous serial I/O, and four 8-bit timers. It operates at up to 10 MHz with a 5 V supply and targets industrial control, sensor interface, and embedded instrumentation applications.

For engineers reviewing the M38067ECAFP datasheet, M38067ECAFP pinout, M38067ECAFP application, or M38067ECAFP equivalent, this page delivers verified functional identity, package mapping, validated pin roles, real-world use context, and confirmed alternative options for design continuity and sourcing resilience.

Technical Context

The M38067ECAFP implements the MELPS 740 CPU core with 16-bit address bus and 8-bit data bus, supporting both single-chip and memory expansion modes. Its interrupt system includes 16 vector sources with priority encoding and nested interrupt capability.

It integrates a programmable clock generating circuit with XIN/XOUT and XCIN/XCOUT oscillator inputs, selectable internal system clock source, and main clock stop control. The A/D converter supports simultaneous sampling on up to 13 analog inputs with conversion time of 64 µs per channel at 10 MHz operation.

Key Specifications

Pinout & Package

Package: 80-pin plastic QFP (80P6N-A), 14 mm × 20 mm, 0.65 mm pitch, lead-free compatible.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M38067ECBFP, the M38067ECAFP trades extended temperature tolerance for lower cost and broader availability in standard industrial environments; compared with UPD78F0503GC-GAH-AX, it offers simpler toolchain support and deterministic real-time behavior at lower power and gate count.

Availability

M38067ECAFP is available at Aetrix Electronics and suitable for industrial sensor hubs, motor control interfaces, smart meter front-ends, and building automation controllers requiring stable component supply across long-lifecycle production programs.

Supply support for M38067ECAFP 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 infrastructure markets.

The 38000 Series - including the M38067ECAFP - was designed for cost-sensitive, high-reliability embedded control applications demanding integrated A/D, serial communication, and real-time I/O without external memory.

FAQ

What is the maximum operating frequency of the M38067ECAFP?

The M38067ECAFP supports a maximum system clock frequency of 10 MHz when using the main crystal oscillator (XIN/XOUT). This corresponds to a 1 µs instruction cycle time for most instructions, enabling deterministic real-time response in control loops. The device's electrical characteristics are fully specified at this frequency under recommended operating conditions (Vcc = 4.5–5.5 V, Ta = –40°C to +85°C). Operation beyond 10 MHz is not guaranteed and may result in timing violations or undefined behavior.

Does the M38067ECAFP include on-chip debug capability?

No, the M38067ECAFP does not integrate on-chip debug circuitry such as JTAG or dedicated debug ports. Development relies on external emulators compatible with the MELPS 740 architecture, such as the E8 emulator, or in-circuit programming via the built-in PROM programmer interface. Debugging is performed by inserting breakpoints through ROM patching or using LED/status port toggling, as confirmed in the "DEVELOPMENT SUPPORT TOOLS FOR MICROCOMPUTERS" data book referenced in the M3806 Group User's Manual.

Can the M38067ECAFP operate from a 3.3 V supply?

No, the M38067ECAFP is specified only for 5 V operation (Vcc = 4.5–5.5 V). Its internal logic levels, A/D reference, and oscillator circuitry are designed for TTL-compatible signaling and 5 V thresholds. Attempting to run at 3.3 V will cause failure to initialize, incorrect A/D results, or unstable clock generation. For 3.3 V systems, Renesas offers later-generation devices like the RL78/G13 series, but the M38067ECAFP itself requires strict adherence to its 5 V supply specification.

How many I/O pins are available on the M38067ECAFP in standard configuration?

The M38067ECAFP provides 64 general-purpose I/O pins distributed across Ports P0–P7 and P10–P13, with individual direction control per pin. Some pins are shared with peripheral functions (e.g., AD0–AD12, TXD0/RXD0), but all 64 remain usable as digital I/O when peripherals are disabled. Pin multiplexing is managed via dedicated port control registers, and unused pins can be configured as inputs with pull-ups enabled to prevent floating states - as documented in Section 2.1.3 of the M3806 Group User's Manual.

Is the M38067ECAFP RoHS compliant?

Yes, the M38067ECAFP is RoHS compliant and lead-free, consistent with Renesas Electronics' environmental policy effective from 2006 onward. The 80P6N-A package uses matte tin plating and meets EU Directive 2011/65/EU requirements. Compliance documentation, including material declarations and test reports, is available through Renesas' official product page and authorized distributors. No exemptions apply, and the device contains no restricted substances above threshold limits.