My Inquiry
My Account
Renesas M34554EDFP#U0
- Part No.:
- M34554EDFP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
M34554EDFP#U0.pdf
- Description:
- MCU, 4-BIT
- Quantity:
- Payment:
- Shipping:
Inventory:718
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
M34554EDFP#U0 from Renesas Electronics is a 4-bit single-chip CMOS microcomputer with One Time PROM (16,384 × 10-bit), 512 × 4-bit RAM including 32-word LCD display RAM, and integrated LCD control circuit supporting up to 32 segments × 4 commons. It features four 8-bit timers (including Timer 4 with dual reload registers), a 16-bit fixed-division Timer 5, 7 interrupt sources, and key-on wakeup on 10 pins - designed for low-power remote control transmitter applications.
For engineers reviewing the M34554EDFP#U0 datasheet, M34554EDFP#U0 pinout, M34554EDFP#U0 application, or M34554EDFP#U0 equivalent, this device requires attention to its OTP memory configuration, 64-pin QFP package constraints, LCD bias/duty programmability (1/2–1/4), and sub-clock quartz oscillator interface (XCIN/XCOUT) for real-time timing in battery-powered remotes.
Technical Context
The M34554EDFP#U0 implements the 4500-series 4-bit CPU core with a minimum instruction execution time of 0.5 µs at 6 MHz in high-speed through mode. Its clock system supports multiple sources: ceramic resonator (XIN/XOUT), RC oscillation, on-chip ring oscillator, and 32 kHz quartz sub-clock (XCIN/XCOUT), selectable via the MR register.
Internal peripherals include a voltage drop detection reset circuit (typ. 1.5 V), watchdog timer (16-bit), LCD drive control with software-selectable bias (1/2, 1/3, 1/4) and duty (2, 3, 4), and dedicated segment/common drivers (SEG0–SEG31, COM0–COM3) with internal resistor-based or external power supply options for VLC pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 4500-series 4-bit CPU with 136 basic instructions and 8-level subroutine nesting |
| Memory | 16,384 × 10-bit One Time PROM; 512 × 4-bit RAM (includes 32 × 4-bit LCD RAM) |
| Timers | Four 8-bit timers (Timers 1–4); Timer 4 has two reload registers; Timer 5 is 16-bit fixed-division |
| LCD Support | 32 segment outputs (SEG0–SEG31), 4 common outputs (COM0–COM3), programmable 1/2–1/4 bias and 2–4 duty |
| Supply Voltage | 2.5 V to 5.5 V - valid across all operating modes and oscillation frequencies |
| Power Consumption | 2.8 mA active (5 V, 6 MHz XIN, 32 kHz XCIN); 20 µA clock-operating mode; 0.1 µA RAM backup |
| Package | 64-pin plastic QFP (64P6N-A), -20 °C to +85 °C industrial temperature range |
Pinout & Package
64P6N-A is a 64-pin quad flat package with 0.5 mm pitch, exposed pad not specified, lead-free per RoHS compliance (Renesas standard). Pin functions validated per REJ03B0043-0300Z Rev.3.00.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VSS | Power supply / Ground | Primary CMOS supply rails; decoupling required near VDD–VSS pair |
| XIN / XOUT | Main clock input/output | Supports ceramic resonator or RC network; internal feedback resistor present |
| XCIN / XCOUT | Sub-clock quartz input/output | 32 kHz crystal interface; internal feedback resistor enables direct connection |
| RESET | Open-drain reset I/O | Outputs low during power-on, watchdog, or voltage-drop reset; accepts external reset pull-up |
| D0–D7, D8/INT0, D9/INT1 | Programmable I/O / Interrupt inputs | D0–D6: N-channel open-drain or CMOS output; D7/CNTR0: timer event counter input or underflow output; D8/D9: key-on wakeup-capable external interrupt inputs |
| P00–P03 / P10–P13 | Key-on wakeup I/O ports | 4-bit ports with software-selectable pull-up and skip decision input logic for low-power wake events |
| P20–P23 / P30–P33 | LCD segment multiplexing inputs | Fixed-input ports mapped directly to SEG31–SEG28 and SEG27–SEG24 respectively |
| COM0–COM3 / SEG0–SEG31 | LCD common/segment drivers | Hardware-driven outputs; COM0–COM3 select bias mode; SEG0–SEG31 drive LCD segments with internal or external VLC supply |
| C/CNTR1 | Timer PWM output / event counter input | CMOS output port; provides PWM signal from Timer 4 or accepts Timer 3 event clock |
Key Features
| Feature | Design Value |
|---|---|
| OTP Memory Configuration | 16,384 × 10-bit One Time PROM enables secure, non-erasable firmware storage for production remote transmitters |
| Integrated LCD Controller | Direct 32×4 segment/common drive eliminates external LCD driver IC, reducing BOM and PCB area |
| Multi-Source Clock System | Independent main clock (ceramic/RC/ring) and sub-clock (32 kHz quartz) support simultaneous high-speed processing and low-power RTC operation |
| Key-On Wakeup Logic | 10 dedicated pins (P00–P03, P10–P13, D8, D9, C) with software-configurable pull-up and skip decision enable ultra-low-power standby in remote controls |
| Voltage Drop Detection Reset | Typ. 1.5 V threshold ensures reliable brown-out reset before MCU functional failure in battery-depleted conditions |
Applications
| Remote Control Transmitter | Industrial Keypad Interface |
|---|---|
Use Scenario: Battery-powered infrared or RF remote for HVAC, audio, or set-top box control with segmented LCD display. IC Role / Device Role / Timing Role: Primary 4-bit MCU executing command encoding, button scan, LCD refresh, and IR carrier generation using Timer 5's fixed division. Use Value: Integrated LCD driver and key-on wakeup reduce external components; OTP prevents firmware cloning; 2.5–5.5 V operation supports alkaline or lithium coin cell supply. | Use Scenario: Panel-mounted keypad with backlight and status indicators in factory HMI or test equipment. IC Role / Device Role / Timing Role: Standalone controller managing matrix scanning, LED/LCD status display, and serial command transmission via port D bit-banging. Use Value: 10-key-on wakeup pins allow selective wake from deep sleep; 32-segment LCD support enables multi-character status readouts without external controller. |
| Consumer Appliance Control Panel | Low-Power Sensor Node Controller |
Use Scenario: Microwave oven or washing machine control panel requiring segmented display, touch/button inputs, and timer-based cooking cycles. IC Role / Device Role / Timing Role: System MCU handling user input, display update, motor/timer control (via Timer 1–4), and safety monitoring using voltage drop detection. Use Value: Watchdog timer and brown-out reset ensure fail-safe operation; OTP memory guarantees certified firmware integrity in safety-critical appliances. | Use Scenario: Wireless sensor node with local LCD readout, push-button configuration, and periodic wake-up for data logging. IC Role / Device Role / Timing Role: Main controller managing sensor interface (via port bits), LCD refresh, low-power sleep scheduling using sub-clock (XCIN), and interrupt-driven wake events. Use Value: 20 µA clock-operating mode extends battery life; 32 kHz sub-clock enables precise sleep interval timing independent of main CPU clock. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M34554M8-XXXFP | Mask ROM version (8,192 × 10-bit), same 64P6N-A package and peripheral set | Requires mask ROM fabrication; unsuitable for prototyping or low-volume revisions | Select when firmware is finalized and high-volume cost sensitivity outweighs flexibility |
| M34554MC-XXXFP | Mask ROM version (12,288 × 10-bit), identical package and I/O architecture | Larger ROM than M34554EDFP#U0 but lacks OTP reprogrammability; fixed at manufacture | Choose for mid-size firmware where mask ROM economics justify upfront NRE and longer lead times |
Compared with M34554M8-XXXFP and M34554MC-XXXFP, the M34554EDFP#U0 provides field-programmable OTP memory for design iteration and small-batch customization, while retaining identical timing, LCD, and interrupt capabilities - making it optimal for pre-production validation and configurable remote variants.
Availability
M34554EDFP#U0 is available at Aetrix Electronics and suitable for remote control transmitters, industrial keypad interfaces, consumer appliance control panels, and low-power sensor node controllers requiring stable component supply across extended product lifecycles.
Supply support for M34554EDFP#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 via merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions.
The 4554 Group - including M34554EDFP#U0 - was engineered for cost-sensitive, ultra-low-power 4-bit applications such as infrared remote controls, featuring integrated LCD drivers and OTP memory to minimize system-level BOM and firmware security risk.
FAQ
What is the memory configuration of the M34554EDFP#U0?
The M34554EDFP#U0 contains 16,384 words × 10-bit One Time PROM for program storage and 512 words × 4-bit RAM, including 32 words × 4-bit dedicated LCD display RAM. Unlike mask ROM variants, the OTP allows one-time field programming, making M34554EDFP#U0 suitable for prototyping and low-volume production where firmware updates are unnecessary after burn-in.
Does the M34554EDFP#U0 support external crystal oscillators?
Yes, the M34554EDFP#U0 supports a 32 kHz quartz crystal oscillator on XCIN/XCOUT pins for sub-clock operation, enabling accurate real-time timing in low-power modes. The main clock (XIN/XOUT) supports ceramic resonators or RC networks but does not support external crystals above 32 kHz - only the sub-clock path is specified for quartz crystal use per REJ03B0043-0300Z.
How many LCD segments and commons does the M34554EDFP#U0 drive?
The M34554EDFP#U0 drives up to 32 LCD segments (SEG0–SEG31) and 4 commons (COM0–COM3), supporting 1/2, 1/3, or 1/4 bias and 2-, 3-, or 4-duty configurations selected in software. This matches standard alphanumeric LCD modules used in remote controls and appliance panels without requiring external segment drivers.
What are the key power management features of the M34554EDFP#U0?
The M34554EDFP#U0 offers three low-power states: clock-operating mode (20 µA at 5 V, 32 kHz), RAM backup mode (0.1 µA), and key-on wakeup on 10 pins with software-controllable pull-up. Combined with voltage drop detection (typ. 1.5 V) and watchdog timer, these features enable robust battery operation in remote transmitters with multi-year shelf life and reliable brown-out recovery.
Can the M34554EDFP#U0 be used as a direct replacement for M34554M8-XXXFP?
No - while M34554EDFP#U0 shares the same 64P6N-A package, pinout, and peripheral set with M34554M8-XXXFP, it uses One Time PROM instead of mask ROM. Firmware must be programmed post-manufacture, and memory layout differs (16K vs. 8K). Hardware compatibility exists, but software and programming workflow differ significantly; it is a functional alternative, not a drop-in replacement.
M34554EDFP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- -
- Series:
- *
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- -
- Core Size:
- -
- Speed:
- -
- Connectivity:
- -
- Peripherals:
- -
- Number of I/O:
- -
- Program Memory Size:
- -
- Program Memory Type:
- -
- EEPROM Size:
- -
- RAM Size:
- -
- Voltage - Supply (Vcc/Vdd):
- -
- Data Converters:
- -
- Oscillator Type:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
M34554EDFP#U0 FAQ
1.How can I place an order for M34554EDFP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for M34554EDFP#U0 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for M34554EDFP#U0 reliable?
The price and inventory of M34554EDFP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M34554EDFP#U0 is usually 5 days.
3.What payment methods are accepted for M34554EDFP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M34554EDFP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M34554EDFP#U0?
M34554EDFP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M34554EDFP#U0 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for M34554EDFP#U0?
For technical support, including M34554EDFP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M34554EDFP#U0 requirements.
6.How does Aetrix verify that M34554EDFP#U0 is sourced from the original manufacturer or authorized distributors?
All M34554EDFP#U0 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that M34554EDFP#U0 meets industry standards.
7.What is the process for return or replacement of M34554EDFP#U0?
All M34554EDFP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with M34554EDFP#U0, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The M34554EDFP#U0 part is unused and in its original packaging.
Return procedure for M34554EDFP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M34554EDFP#U0 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
