Renesas M37547G2FP#U0

Overview

M37547G2FP#U0 from Renesas Electronics is a single-chip 8-bit CMOS microcomputer in the 7547 Group, featuring QzROM (8 KB), 384 bytes RAM, built-in power-on reset and low-voltage detection circuits, and an on-chip clock generator supporting ceramic resonator, quartz crystal, RC, or on-chip oscillator modes. It serves as a cost-optimized embedded controller for industrial sensor interfaces and LED-driven control panels.

For engineers reviewing the M37547G2FP#U0 datasheet, M37547G2FP#U0 pinout, M37547G2FP#U0 application, or M37547G2FP#U0 equivalent, this page delivers verified technical context, package mapping, functional pin roles, real-world use scenarios, and validated alternative options aligned with Renesas' official REJ03B0156-0122 Rev.1.22 specification.

Technical Context

The M37547G2FP#U0 implements the 740-family instruction set with 71 basic instructions and a minimum instruction execution time of 0.25 µs at 8 MHz in double-speed mode. Its CPU includes an 8-bit accumulator, two 8-bit index registers (X/Y), an 8-bit stack pointer, and a 16-bit program counter, all operating under a programmable CPU mode register (CPUM) that configures oscillation source, clock division ratio, and stack page selection.

Peripheral integration includes dual 8-bit timers, dual 16-bit timers, 4-channel output compare, 2-channel input capture, two 8-bit serial interfaces (UART or clock-synchronous), and an 8-channel 10-bit A/D converter referenced to VREF. All I/O ports-P0 (8-bit), P1 (5-bit), P2 (8-bit), P3 (8-bit)-support programmable direction, CMOS/TTL level switching (on select pins), and high-drive LED output capability.

Key Specifications

Pinout & Package

Package: PRSP0036GA-B - 36-pin plastic molded SSOP (0.8 mm pitch), RoHS-compliant, industrial temperature grade.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M37547G2FP#U0, the M37547G4FP#U0 provides scalable memory while preserving full hardware and software compatibility; the UPD78F0503GC-GAH-AX offers modern flash-based flexibility at the cost of architectural discontinuity and redesign effort.

Availability

M37547G2FP#U0 is available at Aetrix Electronics and suitable for industrial sensor nodes, LED-based control panels, PLC I/O modules, and legacy equipment retrofit projects requiring stable component supply and long-term lifecycle support.

Supply support for M37547G2FP#U0 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 7547 Group-including M37547G2FP#U0-is designed for cost-sensitive, high-reliability embedded control in industrial automation, building management, and appliance applications where integrated peripherals and robust power management are critical.

FAQ

What is the maximum operating frequency of the M37547G2FP#U0?

The M37547G2FP#U0 supports a maximum oscillation frequency of 8 MHz when using a ceramic resonator in double-speed mode. At this speed, the minimum instruction execution time is 0.25 µs. Lower frequencies (e.g., 1–4 MHz) are supported in RC or on-chip oscillator modes, enabling operation down to 1.8 V supply voltage. The M37547G2FP#U0's CPU mode register (CPUM) allows runtime selection of clock source and division ratio.

Does the M37547G2FP#U0 include built-in power-on reset and low-voltage detection?

Yes, the M37547G2FP#U0 integrates both a power-on reset (POR) circuit and a low-voltage detection (LVD) circuit. These functions are active upon power application and monitor Vcc continuously, asserting the internal RESET signal if voltage drops below the configured threshold. This eliminates the need for external reset supervisors in most industrial applications. The M37547G2FP#U0's LVD threshold is programmable via function set ROM configuration.

What type of memory does the M37547G2FP#U0 use, and how much is available?

The M37547G2FP#U0 uses QzROM (quasi-read-only memory) for program storage-8 KB total, with 8062 bytes available for user code. It includes 384 bytes of on-chip RAM, allocated across zero-page data storage and stack space. The device also contains a function set ROM area used for automatic peripheral initialization after reset. Unlike flash-based MCUs, the M37547G2FP#U0's QzROM is mask-programmed at manufacture and not field-reprogrammable.

Can the M37547G2FP#U0 drive LEDs directly without external transistors?

Yes, the M37547G2FP#U0's I/O ports P0–P3 support high-drive LED output mode, configurable via software. Each port pin can sink or source sufficient current for standard indicator LEDs (typically up to 15 mA per pin, 80 mA total for P0). This capability is explicitly documented in the pin description table and reduces bill-of-materials cost in display and status-light applications. The M37547G2FP#U0's LED drive functionality is enabled per-port through control registers in the SFR area.

Is the M37547G2FP#U0 pin-compatible with other members of the 7547 Group?

Yes, all members of the 7547 Group-including M37547G2FP#U0, M37547G4FP#U0, and variants with different ROM/RAM configurations-share identical pinout, package (PRSP0036GA-B), and electrical characteristics. They are fully pin-compatible and functionally interchangeable at the hardware level. The M37547G2FP#U0 is also pin-compatible with the earlier 7542 Group, enabling direct upgrades with added features like POR, LVD, and function set ROM.