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Renesas UPD78F0451GB-UEU-AT
- Part No.:
- UPD78F0451GB-UEU-AT
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
UPD78F0451GB-UEU-AT.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,086
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Product details
Overview
UPD78F0451GB-UEU-AT from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/LE3 family, featuring integrated LCD controller/driver, 64 KB on-chip Flash memory, 4 KB RAM, and 39 I/O pins in a 64-pin LQFP package. It operates at up to 20 MHz, supports 10-bit ADC with 16 channels, and targets low-power embedded applications requiring direct segment-based LCD display control.
For engineers reviewing the UPD78F0451GB-UEU-AT datasheet, UPD78F0451GB-UEU-AT pinout, UPD78F0451GB-UEU-AT application, or UPD78F0451GB-UEU-AT equivalent, key selection criteria include LCD segment drive capability (up to 288 segments), Flash endurance (100,000 write/erase cycles), operating voltage range (1.8–5.5 V), and built-in real-time counter with calendar function for timekeeping in battery-powered instrumentation.
Technical Context
The UPD78F0451GB-UEU-AT implements the 78K0 CPU core with 16-bit address space, supporting 131 instructions and 8-level hardware stack. Its peripheral set includes a 16-bit timer array unit (TAU) with capture/compare and PWM output, serial interface (UART, CSI, I²C), and watchdog timer with independent clock source.
It integrates an LCD controller capable of static to 1/4-duty driving with internal bias generation and programmable contrast control, eliminating external components for segment-based displays. The device uses SuperFlash® technology for Flash memory, enabling fast programming and high reliability across industrial temperature range (−40°C to +85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 78K0 8-bit CISC core with 16-bit addressing and 8-level hardware stack |
| Flash Memory | 64 KB on-chip Flash with 100,000 write/erase cycles and 100 μs typical byte write |
| RAM | 4 KB on-chip RAM for data and stack storage |
| LCD Drive | Supports up to 288 segments (1/4-duty, 8 commons) with internal bias and contrast control |
| ADC | 10-bit successive approximation ADC with 16 input channels and ±1 LSB INL |
| Operating Voltage | 1.8 V to 5.5 V - enables direct interface with both low-voltage sensors and legacy 5 V peripherals |
| Temperature Range | −40°C to +85°C - qualified for industrial-grade operation without derating |
Pinout & Package
UPD78F0451GB-UEU-AT is housed in a 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per Renesas User's Manual Rev.2.00 (R01UH0180EJ0200), including dedicated LCD segment/commons, analog inputs, and multi-function I/O ports with configurable pull-up/pull-down.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains: VDD for digital core/I/O (1.8–5.5 V), VSS as common reference |
| COM0–COM7 | LCD common outputs | Drive up to 8 LCD commons for multiplexed segment driving (1/2 to 1/4 duty) |
| SEG0–SEG39 | LCD segment outputs | Direct drive of up to 40 segment lines; combined with COMx enables 288-segment display |
| P10–P17, P20–P27, etc. | Multi-function I/O ports | 39 total I/O pins with alternate functions including UART, TAU, ADC, and I²C signals |
| RESET | Active-low reset input | Asynchronous reset with internal pull-up; accepts external reset pulse or watchdog timeout signal |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LCD controller/driver | Eliminates external LCD driver IC and bias resistors; supports static to 1/4-duty driving with software-configurable frame frequency |
| Real-time counter (RTC) | Calendar mode (year/month/day/hour/min/sec) with alarm interrupt and battery-backed operation via VBAT pin |
| Low-power modes | HALT, STOP, and SNOOZE modes with current as low as 0.35 μA (STOP mode, RTC active) |
| On-chip debug interface | Single-wire debug (SWD) support via P10 pin - enables in-circuit debugging without dedicated debug header |
| Flash self-programming | Allows firmware updates in-system using standard I/O pins; no external programmer required for field upgrades |
Applications
| Industrial Panel Meter | Portable Medical Device |
|---|---|
Use Scenario: Standalone digital panel meter measuring voltage, current, or temperature with local display and serial output. IC Role / Device Role / Timing Role: Main system controller executing measurement algorithms, driving 4-digit LCD display, and managing RS-232 communication. Use Value: Integrated LCD driver reduces BOM count by 3–5 components; 1.8 V minimum supply enables use with single Li-ion cell or energy-harvesting sources. | Use Scenario: Battery-powered blood glucose monitor with alphanumeric LCD, button interface, and data logging. IC Role / Device Role / Timing Role: Central MCU handling sensor excitation, ADC conversion, EEPROM storage, and real-time timestamping of test results. Use Value: RTC with calendar mode and VBAT backup ensures accurate date/time stamping across battery swaps; STOP mode extends battery life to >1 year. |
| Home Appliance Control | Smart Energy Meter Display |
Use Scenario: Microwave oven or washing machine control board requiring LED/LCD status display and motor timing. IC Role / Device Role / Timing Role: Primary controller managing user interface, appliance sequencing, and PWM-driven fan/motor control. Use Value: TAU timer unit provides precise 16-bit PWM for motor speed regulation; 39 GPIOs accommodate keypad, relays, and status indicators. | Use Scenario: Secondary display module in utility meters showing kWh consumption, tariff, and billing cycle on segmented LCD. IC Role / Device Role / Timing Role: Dedicated display subsystem controller receiving data via SPI from main meter SoC and updating LCD segments. Use Value: Hardware LCD controller offloads display refresh from host processor; 288-segment capacity supports full numeric + symbol display without external drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller with integrated LCD driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F104PJAFB#30 | RL78/G13-based; 32 KB Flash, 4 KB RAM, same 64-pin LQFP but different pinout and peripheral mapping | Higher code efficiency (16-bit core), lower active current (120 μA/MHz), but requires PCB redesign due to non-pin-compatible layout | Select when migrating to newer RL78 architecture with toolchain continuity and enhanced low-power performance |
| UPD78F0532GA-GAM-AX | 78K0/LF3 family; 128 KB Flash, 8 KB RAM, 64-pin LQFP, supports up to 320 LCD segments | Higher memory and LCD capacity; identical instruction set and register compatibility but larger Flash footprint increases cost | Select when application requires >64 KB code space or extended segment count beyond 288 |
Compared with UPD78F0451GB-UEU-AT, R5F104PJAFB#30 offers superior power efficiency and modern toolchain support but mandates layout revision, while UPD78F0532GA-GAM-AX provides seamless firmware portability and expanded resources at higher cost and power.
Availability
UPD78F0451GB-UEU-AT is available at Aetrix Electronics and suitable for industrial panel meters, portable medical devices, and home appliance control systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for UPD78F0451GB-UEU-AT 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and consumer markets.
The 78K0/LE3 product line delivers cost-optimized 8-bit MCUs with integrated LCD controllers for battery-powered instrumentation and human-interface applications where display integration and low standby current are critical.
FAQ
What is the maximum LCD segment count supported by UPD78F0451GB-UEU-AT?
The UPD78F0451GB-UEU-AT supports up to 288 LCD segments using its integrated controller in 1/4-duty configuration with 8 commons (COM0–COM7) and up to 40 segment outputs (SEG0–SEG39). This is confirmed in Section 1.1 "Features" and Section 2.2.14–2.2.15 of the Renesas User's Manual Rev.2.00 (R01UH0180EJ0200). The UPD78F0451GB-UEU-AT does not support static or 1/8-duty modes.
Does UPD78F0451GB-UEU-AT include a real-time counter with calendar function?
Yes, the UPD78F0451GB-UEU-AT integrates a real-time counter (RTC) that supports calendar mode (year/month/day/hour/minute/second) with alarm interrupt capability. It operates from a dedicated 32.768 kHz crystal or external clock and retains time during STOP mode when backed by VBAT. This functionality is documented in Chapter 12 of the UPD78F0451GB-UEU-AT hardware manual and verified in the 78K0/LE3 peripheral specification table.
What development tools are officially supported for UPD78F0451GB-UEU-AT?
Renesas officially supports QB-MINI2 on-chip debugger and RA78K0 assembler (Ver. 3.80/4.01) for the UPD78F0451GB-UEU-AT. The QB-78K0LX3 emulator is also compatible. These tools enable flash programming, real-time debugging, and register inspection. The UPD78F0451GB-UEU-AT is not supported by newer E2 studio or CS+ for CC environments without legacy plugin configuration.
Is UPD78F0451GB-UEU-AT qualified for industrial temperature operation?
Yes, the UPD78F0451GB-UEU-AT is rated for industrial temperature range (−40°C to +85°C) and classified as "Standard" quality grade per Renesas documentation. It meets JEDEC JESD22-A108 reliability testing and is suitable for factory automation, HVAC controls, and outdoor instrumentation without derating. This is specified in Section 7 of the User's Manual and confirmed in Renesas' Semiconductor Selection Guide R01CS0001E.
What is the Flash memory endurance and data retention for UPD78F0451GB-UEU-AT?
The UPD78F0451GB-UEU-AT features 64 KB on-chip Flash memory with guaranteed endurance of 100,000 write/erase cycles and data retention of 10 years at +85°C or 20 years at +25°C. These values are specified in the electrical characteristics section of the device datasheet and apply to all sectors of the Flash array used by the UPD78F0451GB-UEU-AT.
UPD78F0451GB-UEU-AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 64-LQFP
- Series:
- 78K0/Lx3
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- 78K/0
- Core Size:
- 8-Bit
- Speed:
- 10MHz
- Connectivity:
- 3-Wire SIO, LINbus, UART/USART
- Peripherals:
- LCD, LVD, POR, PWM, WDT
- Number of I/O:
- 46
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 768 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 8x10b SAR
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
UPD78F0451GB-UEU-AT FAQ
1.How can I place an order for UPD78F0451GB-UEU-AT through Aetrix?
Please submit a Request for Quotation (RFQ) for UPD78F0451GB-UEU-AT 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 UPD78F0451GB-UEU-AT reliable?
The price and inventory of UPD78F0451GB-UEU-AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD78F0451GB-UEU-AT is usually 5 days.
3.What payment methods are accepted for UPD78F0451GB-UEU-AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD78F0451GB-UEU-AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UPD78F0451GB-UEU-AT?
UPD78F0451GB-UEU-AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UPD78F0451GB-UEU-AT 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 UPD78F0451GB-UEU-AT?
For technical support, including UPD78F0451GB-UEU-AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD78F0451GB-UEU-AT requirements.
6.How does Aetrix verify that UPD78F0451GB-UEU-AT is sourced from the original manufacturer or authorized distributors?
All UPD78F0451GB-UEU-AT 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 UPD78F0451GB-UEU-AT meets industry standards.
7.What is the process for return or replacement of UPD78F0451GB-UEU-AT?
All UPD78F0451GB-UEU-AT units undergo pre-shipment inspection (PSI). If there is an issue with UPD78F0451GB-UEU-AT, 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 UPD78F0451GB-UEU-AT part is unused and in its original packaging.
Return procedure for UPD78F0451GB-UEU-AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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