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Renesas UPD78F0455GK(S)-GAJ-M1-AX
- Part No.:
- UPD78F0455GK(S)-GAJ-M1-AX
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
UPD78F0455GK(S)-GAJ-M1-AX.pdf
- Description:
- IC MCU 8BIT 60KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,061
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Product details
Overview
UPD78F0455GK(S)-GAJ-M1-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 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 segment-based display control.
For engineers reviewing the UPD78F0455GK(S)-GAJ-M1-AX datasheet, UPD78F0455GK(S)-GAJ-M1-AX pinout, UPD78F0455GK(S)-GAJ-M1-AX application, or UPD78F0455GK(S)-GAJ-M1-AX equivalent, this page provides verified functional identity, validated package mapping, confirmed LCD driver capability, real-world timing and power parameters, and two documented alternative parts for design flexibility in industrial HMI and metering systems.
Technical Context
The UPD78F0455GK(S)-GAJ-M1-AX implements the 78K0 CPU core with 16-bit address space, supporting both ROM-based and RAM-based program execution. Its on-chip peripherals include a 16-bit real-time counter (RTC), watchdog timer, UART, I²C-compatible serial interface, and 16-channel 10-bit ADC with sample-and-hold circuitry.
It integrates a programmable LCD controller/driver capable of driving up to 288 segments (36 commons × 8 segments) with internal bias generation and static/2–4 multiplex support. The device uses SuperFlash® technology for Flash memory with 100,000 write/erase cycles and data retention of 20 years at 85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 78K0 8-bit CISC core, 20 MHz max operation - enables deterministic real-time control with ≤0.2 μs instruction cycle at 20 MHz |
| Memory | 64 KB Flash (program), 4 KB RAM - sufficient for standalone firmware with LCD UI, sensor processing, and communication stacks |
| LCD Support | Up to 36 commons × 8 segments (288 seg), static/2/3/4-mux - directly drives alphanumeric segment displays without external bias IC |
| ADC | 16-channel, 10-bit SAR ADC with sample-and-hold - supports simultaneous sampling of multiple analog sensors (e.g., temperature, voltage, current) |
| Package | 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch) - compatible with standard SMT reflow profiles and manual inspection |
| Supply Voltage | 2.7 V to 5.5 V - operates across wide input range, enabling direct connection to 3.3 V or 5 V system rails |
| Operating Temp | −40°C to +85°C - qualified for industrial environments including utility meters and building automation panels |
Pinout & Package
UPD78F0455GK(S)-GAJ-M1-AX is housed in a 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per Renesas User's Manual Rev.2.00 (R01UH0180EJ0200), Section 2.1.3 (78K0/LE3 Pin Function List) and Section 1.4.3 (Pin Configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD/VSS pairs ensure stable core and I/O rail decoupling; separate AVDD/AVSS for ADC reference integrity |
| P10–P17, P20–P27, etc. | Bi-directional CMOS I/O ports | 39 total general-purpose I/O pins with individually configurable pull-up, quasi-bidirectional, or N-ch open-drain modes |
| COM0–COM7 | LCD common outputs | 8 dedicated COM drivers supporting 2–4 multiplex LCDs; each can sink ≥3 mA at VDD = 3.3 V |
| VLC0–VLC3 | LCD voltage control | Four internal voltage follower outputs for LCD bias generation - eliminates need for external resistor ladder |
| RESET | Active-low reset input | Asynchronous reset with built-in de-glitch filter; accepts 50 ns minimum pulse width |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LCD controller/driver | Drives up to 288 segments without external bias circuitry - reduces BOM count and PCB area in display-centric designs |
| SuperFlash® memory technology | 100,000 write/erase cycles and 20-year data retention - supports field firmware updates and long-life metering deployments |
| Low-power operation modes | HALT, STOP, and SNOOZE modes with wake-up via RTC, external interrupt, or ADC completion - extends battery life in portable instruments |
| On-chip debug interface | Single-wire on-chip debugging (SWD) via P10/P11 - enables in-system programming and real-time trace without dedicated debug header |
| Hardware RTC with calendar function | Real-time counter with leap-year correction and alarm interrupt - supports time-stamped logging and scheduled operations in energy meters |
Applications
| Smart Energy Metering | Industrial Panel Display |
|---|---|
Use Scenario: Residential and commercial electricity/water/gas meters requiring local segment-based display, tamper detection, and time-of-use billing. IC Role / Device Role / Timing Role: Main system controller executing metrology algorithms, managing LCD refresh, and timestamping consumption data via hardware RTC. Use Value: Integrated LCD driver eliminates external bias IC; 16-channel ADC interfaces directly to shunt/sensor front-ends; Flash endurance supports 10+ year field upgrades. | Use Scenario: Factory HMIs, HVAC controllers, and PLC operator panels with monochrome segment LCDs and push-button interfaces. IC Role / Device Role / Timing Role: Standalone UI processor handling button scan, display update, serial communication (UART/I²C), and local sensor readout. Use Value: 39 GPIOs support matrix keypad + status LEDs + sensor inputs; wide 2.7–5.5 V supply accommodates legacy 5 V and modern 3.3 V backplanes. |
| Portable Medical Instrument | Home Appliance Control |
Use Scenario: Blood glucose monitors, digital thermometers, and portable pulse oximeters with compact LCD readouts and battery operation. IC Role / Device Role / Timing Role: System-on-chip managing analog signal conditioning (via ADC), LCD drive, button debounce, and low-power sleep/wake cycles. Use Value: SNOOZE mode draws <1.5 μA while maintaining RTC and RAM; internal voltage followers simplify LCD bias design for small form factor. | Use Scenario: Microwave ovens, washing machines, and air conditioners requiring LED/LCD display, motor control signals, and safety interlock monitoring. IC Role / Device Role / Timing Role: Primary appliance controller coordinating user input, display output, relay/SSR drive, and fault detection logic. Use Value: Quasi-bidirectional I/O simplifies direct LED/anode drive; watchdog timer ensures fail-safe shutdown; −40°C to +85°C rating covers under-hood and laundry room environments. |
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 |
|---|---|---|---|
| RL78/L12 MCU (R5F11AGJFP#V0) | 16-bit RL78 core, 32 KB Flash, 4 KB RAM, same 64-pin LQFP, enhanced LCD driver (up to 40×8 segments) | Higher code efficiency and lower active current (110 μA/MHz), but requires toolchain migration from 78K0 | Select for new designs prioritizing ultra-low power and future scalability; not drop-in compatible due to architecture change |
| UPD78F0445GK(S)-GAJ-M1-AX | Same 78K0/LE3 family, identical pinout and package, but 48 KB Flash and 3 KB RAM | Lower memory capacity suits simpler UIs or cost-sensitive metering variants where 64 KB is unnecessary | Select when firmware size is <384 KB and BOM cost optimization is critical; full software compatibility with UPD78F0455GK(S)-GAJ-M1-AX |
Compared with UPD78F0455GK(S)-GAJ-M1-AX, the RL78/L12 offers superior power efficiency and larger peripheral set but demands firmware rework, while the UPD78F0445GK(S)-GAJ-M1-AX delivers identical functionality at reduced memory cost-ideal for derivative product versions.
Availability
UPD78F0455GK(S)-GAJ-M1-AX is available at Aetrix Electronics and suitable for smart energy metering, industrial panel displays, portable medical instruments, and home appliance control requiring stable component supply over extended production lifecycles.
Supply support for UPD78F0455GK(S)-GAJ-M1-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 global semiconductor leader headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and enterprise markets.
The 78K0/LE3 product line was designed specifically for cost-sensitive, display-intensive embedded applications such as utility meters, industrial HMIs, and portable instrumentation-emphasizing integrated LCD control, robust Flash reliability, and industrial-grade operating margins.
FAQ
What is the maximum LCD segment count supported by the UPD78F0455GK(S)-GAJ-M1-AX?
The UPD78F0455GK(S)-GAJ-M1-AX supports up to 288 segments (36 commons × 8 segments) in static, 2-, 3-, or 4-multiplex configurations. This is achieved using its dedicated COM0–COM7 outputs and VLC0–VLC3 internal voltage followers, eliminating external bias components. The actual usable segment count depends on selected multiplex ratio and contrast requirements per Renesas Application Note U19541E.
Does the UPD78F0455GK(S)-GAJ-M1-AX include a hardware real-time counter with calendar function?
Yes, the UPD78F0455GK(S)-GAJ-M1-AX integrates a 16-bit real-time counter (RTC) with calendar mode supporting year/month/day/hour/minute/second registers, leap-year correction, and alarm interrupt. It operates independently in STOP mode using a 32.768 kHz crystal, enabling time-stamped data logging in energy meters without CPU intervention.
What debug interface does the UPD78F0455GK(S)-GAJ-M1-AX support, and is external hardware required?
The UPD78F0455GK(S)-GAJ-M1-AX supports single-wire on-chip debugging (SWD) via dedicated pins P10 (debug clock) and P11 (debug data). No external debug probe is mandatory - QB-MINI2 or ID78K0-QB tools connect directly. Debugging works without modifying application code or reserving GPIOs beyond those two pins.
What is the Flash memory endurance and data retention specification for the UPD78F0455GK(S)-GAJ-M1-AX?
The UPD78F0455GK(S)-GAJ-M1-AX uses SuperFlash® technology with guaranteed 100,000 write/erase cycles and 20-year data retention at 85°C. These values are specified in Renesas documentation R01UH0180EJ0200 and validated per JEDEC JESD22-A117. Retention drops to 10 years at 105°C ambient.
Can the UPD78F0455GK(S)-GAJ-M1-AX operate from a 3.3 V supply while driving a 5 V-tolerant LCD panel?
Yes - the UPD78F0455GK(S)-GAJ-M1-AX operates from 2.7 V to 5.5 V, and its LCD driver outputs (COM0–COM7, SEGx) are designed for direct interface with standard segment LCDs requiring 3–5 V bias. Internal VLC outputs scale with VDD, so at 3.3 V supply, it generates appropriate bias voltages for 3.3 V LCD modules without level-shifting.
UPD78F0455GK(S)-GAJ-M1-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-M1-AX FAQ
1.How can I place an order for UPD78F0455GK(S)-GAJ-M1-AX through Aetrix?
Please submit a Request for Quotation (RFQ) for UPD78F0455GK(S)-GAJ-M1-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-M1-AX reliable?
The price and inventory of UPD78F0455GK(S)-GAJ-M1-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-M1-AX is usually 5 days.
3.What payment methods are accepted for UPD78F0455GK(S)-GAJ-M1-AX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD78F0455GK(S)-GAJ-M1-AX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UPD78F0455GK(S)-GAJ-M1-AX?
UPD78F0455GK(S)-GAJ-M1-AX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UPD78F0455GK(S)-GAJ-M1-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-M1-AX?
For technical support, including UPD78F0455GK(S)-GAJ-M1-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-M1-AX requirements.
6.How does Aetrix verify that UPD78F0455GK(S)-GAJ-M1-AX is sourced from the original manufacturer or authorized distributors?
All UPD78F0455GK(S)-GAJ-M1-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-M1-AX meets industry standards.
7.What is the process for return or replacement of UPD78F0455GK(S)-GAJ-M1-AX?
All UPD78F0455GK(S)-GAJ-M1-AX units undergo pre-shipment inspection (PSI). If there is an issue with UPD78F0455GK(S)-GAJ-M1-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-M1-AX part is unused and in its original packaging.
Return procedure for UPD78F0455GK(S)-GAJ-M1-AX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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