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Renesas UPD78F0455GK(S)-GAJ-AX
- Part No.:
- UPD78F0455GK(S)-GAJ-AX
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
UPD78F0455GK(S)-GAJ-AX.pdf
- Description:
- IC MCU 8BIT 60KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,843
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Product details
Overview
UPD78F0455GK(S)-GAJ-AX 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 a 16-bit timer array unit. It operates at up to 20 MHz with supply voltage range of 2.7 V to 5.5 V and supports 100-pin LQFP packaging. It targets embedded control applications requiring direct segment-based LCD display management, such as industrial HMIs and portable instrumentation.
For engineers reviewing the UPD78F0455GK(S)-GAJ-AX datasheet, UPD78F0455GK(S)-GAJ-AX pinout, UPD78F0455GK(S)-GAJ-AX application, or UPD78F0455GK(S)-GAJ-AX equivalent, key selection considerations include LCD segment drive capability (up to 288 segments), Flash endurance (100,000 write/erase cycles), real-time counter with low-voltage operation, and built-in A/D converter with 10-bit resolution and 16-channel input multiplexing.
Technical Context
The UPD78F0455GK(S)-GAJ-AX implements the 78K0 CPU core with 16-bit addressing space, supporting both 8-bit and 16-bit instructions. Its peripheral set includes a 16-bit timer array unit (TAU) with waveform generation, watchdog timer, UART/SIO, I²C-compatible serial interface, and a 10-bit successive-approximation ADC with sample-and-hold circuitry.
It integrates an LCD controller/driver supporting static, 1/2-, 1/3-, and 1/4-duty drive modes with internal bias generation and charge pump, enabling direct connection to segment-combination LCD panels without external components. The device also features on-chip voltage regulator (REGC pin) for stable LCD bias voltage generation and dedicated COM/SEG terminal mapping verified for 100-pin LQFP package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 78K0 8-bit CISC core with 16-bit address bus; executes instructions at up to 20 MHz system clock |
| Flash Memory | 64 KB on-chip Flash with 100,000 write/erase cycles; supports in-application programming (IAP) |
| RAM Size | 4 KB on-chip RAM; used for data storage, stack, and variable allocation during runtime |
| LCD Drive Capability | Supports up to 288 segments via 8 COM × 36 SEG or 4 COM × 72 SEG configuration; internal charge pump eliminates need for external bias IC |
| ADC Resolution | 10-bit successive-approximation ADC with 16 selectable analog inputs; conversion time ≤ 12.5 μs per channel |
| Supply Voltage | 2.7 V to 5.5 V operation; enables compatibility with battery-powered and industrial 3.3 V/5 V systems |
| Package | 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch); RoHS-compliant, lead-free finish |
Pinout & Package
The UPD78F0455GK(S)-GAJ-AX is housed in a 100-pin LQFP package with exposed thermal pad. Pin functions are defined per Renesas User's Manual Rev.2.00 (R01UH0180EJ0200), Section 2.1.3 (78K0/LE3) and Section 1.4.3 (pin configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains: VDD supplies core/peripherals; VSS provides reference return path for all digital and analog sections |
| COM0–COM7 | LCD common outputs | Drive LCD backplane signals; support static to 1/4-duty drive; internally configurable via LCD control registers |
| SEG0–SEG71 | LCD segment outputs | Drive LCD segment electrodes; mapped to P1–P4, P8–P15 ports depending on duty mode; enable full 288-segment display |
| RESET | Active-low reset input | Asynchronous hardware reset; must be held low ≥ 100 ns after VDD stabilization to ensure reliable initialization |
| REGC | LCD voltage regulator control | Connects to external capacitor to stabilize internal charge pump output; sets LCD bias voltage level (VLCD ≈ 3× VDD) |
Key Features
| Feature | Design Value |
|---|---|
| LCD Controller/Driver Integration | On-chip support for static, 1/2-, 1/3-, and 1/4-duty LCD drive with programmable bias and frame frequency; eliminates external driver IC and reduces BOM count |
| Real-Time Counter (RTC) | Independent 8-bit RTC with calendar function (year/month/day/hour/min/sec); operates down to 1.8 V using sub-oscillator, enabling battery-backed timekeeping |
| 16-bit Timer Array Unit (TAU) | Four independent 16-bit timers with capture/compare, PWM generation, and interval timing; supports motor control and precise event synchronization |
| On-Chip Debug Support | Fully compatible with QB-MINI2 on-chip debugger; enables real-time trace, breakpoint, and register inspection without external emulator hardware |
| EEPROM Emulation Library | Software library (U18275E) enables Flash sectors to emulate EEPROM behavior with wear-leveling; supports 100,000+ data writes to nonvolatile storage |
Applications
| Industrial HMI Panel | Portable Medical Instrument |
|---|---|
Use Scenario: Standalone front-panel interface for PLC-controlled machinery with local parameter adjustment and status visualization. IC Role / Device Role / Timing Role: Primary system controller managing keypad input, LED indicators, and segmented LCD display; RTC maintains operational timestamps. Use Value: Integrated LCD driver reduces component count by 3–5 discrete drivers; 64 KB Flash accommodates firmware + localized language strings; 10-bit ADC reads sensor feedback directly. | Use Scenario: Battery-powered blood glucose meter with alphanumeric LCD readout and button navigation. IC Role / Device Role / Timing Role: Main MCU handling glucose sensor signal acquisition, calculation, display update, and low-power sleep/wake cycling. Use Value: 2.7–5.5 V operation supports single-cell Li-ion or dual-AA supply; RTC retains time during standby; LCD driver powers display without external bias IC. |
| Smart Energy Meter Display | Home Appliance Control Board |
Use Scenario: Local display module in DIN-rail mounted electricity meter showing kWh, voltage, current, and tariff information. IC Role / Device Role / Timing Role: Dedicated display controller interfacing with main metering SoC via UART; drives 4-line alphanumeric LCD with backlight control. Use Value: 288-segment capability supports custom icons and multi-language glyphs; Flash memory stores regional display templates; REGC pin simplifies bias design. | Use Scenario: Control board in refrigerator/freezer managing temperature sensing, compressor logic, defrost cycle, and door-open alert display. IC Role / Device Role / Timing Role: Secondary MCU coordinating user interface (buttons, LEDs, LCD) and environmental monitoring; isolated from high-voltage power stage. Use Value: 10-bit ADC reads NTC thermistors with ±1°C accuracy; TAU timers generate precise PWM for fan speed control; low-voltage RTC ensures accurate defrost scheduling. |
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 |
|---|---|---|---|
| R5F100PLAFB#30 | RL78/G13-based; 32 KB Flash, 4 KB RAM, same 100-pin LQFP; lower power (0.52 μA deep standby), but no built-in charge pump for LCD | Requires external LCD bias circuitry; better suited for ultra-low-power designs where display complexity is reduced | Select when lowest active/standby current is critical and LCD segment count ≤ 192 |
| MB95560PFT-G-SNE1 | Fujitsu FM3-based; 64 KB Flash, 8 KB RAM, 100-pin LQFP; supports 320-segment LCD but lacks integrated RTC and real-time counter | No native calendar function; requires external RTC or software emulation for timestamping | Select when higher RAM and extended peripheral set (e.g., CAN) are needed, and RTC is not mandatory |
Compared with R5F100PLAFB#30 and MB95560PFT-G-SNE1, the UPD78F0455GK(S)-GAJ-AX uniquely combines 288-segment LCD drive with internal charge pump, hardware RTC with calendar, and Flash endurance optimized for field-upgradable firmware - making it optimal for cost-sensitive, display-centric industrial and medical devices requiring long-term reliability without external bias components.
Availability
UPD78F0455GK(S)-GAJ-AX is available at Aetrix Electronics and suitable for industrial HMI panels, portable medical instruments, smart energy meter displays, and home appliance control boards requiring stable component supply across multi-year production cycles.
Supply support for UPD78F0455GK(S)-GAJ-AX 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, power, and SoC solutions for automotive, industrial, and IoT markets.
The 78K0/LE3 product line, including UPD78F0455GK(S)-GAJ-AX, was designed for cost-effective, display-integrated embedded control in battery-powered and panel-mounted equipment requiring reliable LCD management and moderate processing capability.
FAQ
What is the maximum LCD segment count supported by UPD78F0455GK(S)-GAJ-AX?
The UPD78F0455GK(S)-GAJ-AX supports up to 288 LCD segments using its integrated controller/driver in 1/4-duty mode (8 COM × 36 SEG) or 1/2-duty mode (4 COM × 72 SEG). This capability is confirmed in Section 1.1 (Features) and Section 2.2.14–2.2.15 of the Renesas User's Manual R01UH0180EJ0200. The UPD78F0455GK(S)-GAJ-AX achieves this without external bias circuitry due to its internal charge pump and REGC pin functionality.
Does UPD78F0455GK(S)-GAJ-AX include a real-time counter with calendar function?
Yes, the UPD78F0455GK(S)-GAJ-AX includes a dedicated real-time counter (RTC) with full calendar support (year/month/day/hour/minute/second), documented in Section 1.1 and Section 4.5 of the Renesas User's Manual R01UH0180EJ0200. The RTC operates independently using a sub-oscillator and remains functional down to 1.8 V, enabling battery-backed timekeeping. This feature is implemented in hardware and does not require CPU intervention for basic timekeeping, ensuring accuracy and low power consumption in the UPD78F0455GK(S)-GAJ-AX.
What is the Flash memory endurance specification for UPD78F0455GK(S)-GAJ-AX?
The UPD78F0455GK(S)-GAJ-AX specifies 100,000 write/erase cycles for its 64 KB on-chip Flash memory, as stated in the Electrical Characteristics section (Section 23.2) of the Renesas datasheet and confirmed in Application Note U18274E (Self Programming Library). This endurance rating applies under standard operating conditions (Ta = 25°C, VDD = 5.0 V) and supports robust field firmware updates. The UPD78F0455GK(S)-GAJ-AX also supports in-application programming (IAP), allowing safe over-the-air or local reprogramming without external tools.
Which development tools are officially supported for UPD78F0455GK(S)-GAJ-AX?
Renesas officially supports the QB-MINI2 on-chip debug emulator and the RA78K0 assembler (Ver. 4.01) and CC78K0 C compiler (Ver. 4.00) for the UPD78F0455GK(S)-GAJ-AX, as listed in the "Related Documents" section of the User's Manual R01UH0180EJ0200. The PM+ IDE (Ver. 6.30) provides integrated project management, and the PG-FP5 programmer supports mass production flashing. These tools are validated for the UPD78F0455GK(S)-GAJ-AX and referenced in documents U18371E, U17199E, and U17201E.
Is UPD78F0455GK(S)-GAJ-AX qualified for industrial temperature range operation?
Yes, the UPD78F0455GK(S)-GAJ-AX is rated for industrial temperature operation from −40°C to +85°C, consistent with Renesas' "Standard" quality grade classification defined in Section 7 of the User's Manual R01UH0180EJ0200. This rating is verified in the Absolute Maximum Ratings and DC Characteristics tables (Sections 22 and 23), and the device meets JEDEC JESD47 reliability standards for industrial applications. The UPD78F0455GK(S)-GAJ-AX is therefore suitable for deployment in factory automation, building controls, and outdoor instrumentation environments.
UPD78F0455GK(S)-GAJ-AX 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:
- 60KB (60K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 2K 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:
UPD78F0455GK(S)-GAJ-AX FAQ
1.How can I place an order for UPD78F0455GK(S)-GAJ-AX through Aetrix?
Please submit a Request for Quotation (RFQ) for UPD78F0455GK(S)-GAJ-AX 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 UPD78F0455GK(S)-GAJ-AX reliable?
The price and inventory of UPD78F0455GK(S)-GAJ-AX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD78F0455GK(S)-GAJ-AX is usually 5 days.
3.What payment methods are accepted for UPD78F0455GK(S)-GAJ-AX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD78F0455GK(S)-GAJ-AX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UPD78F0455GK(S)-GAJ-AX?
UPD78F0455GK(S)-GAJ-AX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UPD78F0455GK(S)-GAJ-AX 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 UPD78F0455GK(S)-GAJ-AX?
For technical support, including UPD78F0455GK(S)-GAJ-AX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD78F0455GK(S)-GAJ-AX requirements.
6.How does Aetrix verify that UPD78F0455GK(S)-GAJ-AX is sourced from the original manufacturer or authorized distributors?
All UPD78F0455GK(S)-GAJ-AX 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 UPD78F0455GK(S)-GAJ-AX meets industry standards.
7.What is the process for return or replacement of UPD78F0455GK(S)-GAJ-AX?
All UPD78F0455GK(S)-GAJ-AX units undergo pre-shipment inspection (PSI). If there is an issue with UPD78F0455GK(S)-GAJ-AX, 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 UPD78F0455GK(S)-GAJ-AX part is unused and in its original packaging.
Return procedure for UPD78F0455GK(S)-GAJ-AX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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