Renesas M34552G8FP#U0

Overview

M34552G8FP#U0 from Renesas Electronics is a 4-bit single-chip CMOS microcomputer with 8192 words × 10-bit mask ROM, 288 words × 4-bit RAM (including 28 words × 4-bit LCD display RAM), and integrated LCD control circuit supporting up to 28 segments × 4 commons. It features three timers (two 8-bit, one 16-bit), watchdog timer, key-on wakeup on 9 pins, and operates from 1.8 V to 5.5 V at up to 6 MHz - optimized for remote control transmitter applications.

For engineers reviewing the M34552G8FP#U0 datasheet, M34552G8FP#U0 pinout, M34552G8FP#U0 application, or M34552G8FP#U0 equivalent, this page delivers verified technical context, exact package mapping (48P6S-A QFP), validated pin functions including multifunction LCD/oscillator/INT roles, and two confirmed alternative parts with documented functional and supply-chain differences.

Technical Context

The M34552G8FP#U0 implements the 4500-series CPU core with a high-speed instruction set enabling 0.5 µs minimum instruction execution at 6 MHz in high-speed through mode. Its system clock supports multiple sources: external ceramic resonator (XIN/XOUT), RC oscillator, quartz crystal sub-clock (XCIN/XCOUT at 32.768 kHz), and internal ring oscillator.

Peripheral integration includes Timer 1 (8-bit with reload), Timer 2 (8-bit with dual reload and PWM output via CNTR), Timer 3 (16-bit fixed-division clock counter), and a dedicated 4-bit LCD timer. The voltage drop detection circuit is absent - confirming this is the non-H variant per documentation.

Key Specifications

Pinout & Package

Package: 48-pin plastic QFP (48P6S-A), 0.5 mm pitch, body size 10 mm × 10 mm, operating temperature range –20 °C to +85 °C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-bit microcontroller applications.

Compared with M34552M8FP#U0, the M34552G8FP#U0 provides 100% more ROM for complex IR learning algorithms or multilingual UI assets; compared with UPD78F0503GC-GAH-AX, it offers proven cost-optimized silicon for high-volume legacy remote production but lacks flash reprogrammability and advanced peripherals.

Availability

M34552G8FP#U0 is available at Aetrix Electronics and suitable for remote control transmitters, consumer keypad interfaces, low-power sensor nodes, and small-appliance display managers requiring stable component supply across multi-year production cycles.

Supply support for M34552G8FP#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 formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions for automotive, industrial, and consumer markets.

The 4552 Group microcontrollers were designed specifically for ultra-low-power, cost-sensitive infrared remote control and simple LCD-based human interface applications - emphasizing minimal external components, battery longevity, and production-ready mask-ROM reliability.

FAQ

What is the maximum operating frequency of the M34552G8FP#U0?

The M34552G8FP#U0 achieves a minimum instruction execution time of 0.5 µs at 6 MHz oscillation frequency in high-speed through mode. This corresponds to a maximum system clock (STCK) of 6 MHz, with instruction clock (INSTCK) derived as STCK/3 - enabling reliable 38 kHz IR carrier generation and real-time key scanning without software timing jitter.

Does the M34552G8FP#U0 include a voltage drop detection circuit?

No, the M34552G8FP#U0 does not include a voltage drop detection circuit. That feature is exclusive to the "H" variants (e.g., M34552G8HFP#U0) as explicitly stated in the documentation. The M34552G8FP#U0 relies on external reset supervision or software-based brown-out monitoring if required.

How many LCD segments can the M34552G8FP#U0 drive, and what bias options are supported?

The M34552G8FP#U0 drives up to 28 segments with 4 commons, supporting selectable 1/2, 1/3, or 1/4 bias configurations. Common outputs COM0–COM3 are dedicated pins, and segment outputs SEG0–SEG28 are mapped across ports D, P0, P1, P2, and C - enabling direct connection to standard multiplexed LCD glass without external drivers.

Which pins on the M34552G8FP#U0 support key-on wakeup functionality?

Nine pins support key-on wakeup: D0–D5 (6 pins), P00–P03 (4 pins). Each has configurable edge detection (rising/falling/both) and can trigger wake-from-halt mode. The function is enabled per-pin via control registers K0 and K2, and requires pull-up resistors or internal pull-up activation for reliable detection.

Is the M34552G8FP#U0 pin-compatible with other members of the 4552 Group?

Yes, all 4552 Group variants - including M34552M4FP#U0, M34552M8FP#U0, and M34552G8FP#U0 - share identical 48P6S-A package, pinout, and peripheral register mapping. Differences are limited to ROM size (4096 vs. 8192 words) and presence/absence of voltage detection (H vs. non-H), ensuring full hardware compatibility across the family.