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Renesas UPD78F0485GK(R)-GAK-AX
- Part No.:
- UPD78F0485GK(R)-GAK-AX
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 80-LQFP
- Datasheet:
-
UPD78F0485GK(R)-GAK-AX.pdf
- Description:
- IC MCU 8BIT 60KB FLASH 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,699
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Product details
Overview
UPD78F0485GK(R)-GAK-AX from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/LF3 family, featuring integrated LCD controller/driver, 64 KB on-chip Flash memory, 4 KB RAM, and 39 I/O pins. It operates at up to 20 MHz, supports 10-bit ADC (8 channels), and targets embedded control applications with display interface requirements such as industrial HMIs and portable instrumentation.
For engineers reviewing the UPD78F0485GK(R)-GAK-AX datasheet, UPD78F0485GK(R)-GAK-AX pinout, UPD78F0485GK(R)-GAK-AX application, or UPD78F0485GK(R)-GAK-AX equivalent, key selection criteria include LCD segment drive capability (up to 288 segments), Flash endurance (100,000 write/erase cycles), operating voltage range (2.7–5.5 V), and support for low-power modes including HALT and STOP.
Technical Context
The UPD78F0485GK(R)-GAK-AX implements the 78K0 CPU core with 16-bit addressing, supporting 131 instructions and a 3-stage pipeline. Its on-chip peripherals include a 16-bit timer array unit (TAU) with capture/compare functions, serial interface (UART/SIO), watchdog timer, and power-on reset circuitry.
It integrates an LCD controller capable of static, 2-, 3-, or 4-multiplex drive with internal bias generation and VLCD voltage regulation. The device uses SuperFlash® technology for program memory and includes EEPROM emulation support via Flash data flash area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 78K0 8-bit CISC core with 3-stage pipeline and 131 instructions |
| Flash Memory | 64 KB on-chip Flash with 100,000 write/erase cycles and 128-byte block erase |
| RAM | 4 KB on-chip RAM for data and stack operations |
| LCD Drive | Supports up to 288 segments (4-mux), with internal bias generator and VLCD regulation |
| ADC | 10-bit successive approximation ADC with 8 input channels and built-in reference |
| Operating Voltage | 2.7 V to 5.5 V - enables direct interface with 3.3 V or 5 V logic systems |
| Max Clock Frequency | 20 MHz - allows real-time response in control loops with sub-50 ns instruction cycle |
Pinout & Package
UPD78F0485GK(R)-GAK-AX is housed in a 64-pin LQFP package (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 1.4.4 and 2.1.4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains: VDD (core/I/O), VSS (digital ground); separate AVDD/AVSS for analog peripherals |
| P10–P17, P20–P27, etc. | Bi-directional CMOS I/O ports | 39 total general-purpose I/O pins; configurable pull-up, quasi-bidirectional, or N-ch open-drain mode |
| COM0–COM7 | LCD common outputs | 8 dedicated COM drivers for multiplexed LCD panel connection |
| VLC0–VLC3 | LCD voltage control | 4 pins for external resistor network to set LCD bias voltage (VLCD) |
| RESET | Active-low reset input | Asynchronous reset with internal pull-up; accepts external reset signal or power-on reset assertion |
| REGC | Internal regulator control | Enables/disables on-chip voltage regulator for LCD bias generation |
Key Features
| Feature | Design Value |
|---|---|
| LCD Controller Integration | Hardware-accelerated 4-mux LCD driver eliminates need for external segment drivers and timing logic |
| Flash Endurance & Security | 100,000 write/erase cycles with lock-bit protection against unauthorized read/write access |
| Low-Power Operation | HALT mode (0.8 μA typical) and STOP mode (0.35 μA typical) extend battery life in portable devices |
| Analog Integration | On-chip 10-bit ADC with internal reference and sample-and-hold enables sensor interface without external components |
| Development Support | Fully supported by RA78K0 assembler, CC78K0 C compiler, and QB-MINI2 on-chip debugger |
Applications
| Industrial HMI Panels | Portable Medical Instruments |
|---|---|
Use Scenario: Standalone front-panel interface for PLCs, temperature controllers, or motor drives with segmented LCD display. IC Role / Device Role / Timing Role: Central controller managing button inputs, sensor readings, real-time clock, and dynamic LCD refresh at 60 Hz. Use Value: Integrated LCD driver reduces BOM count by eliminating external driver ICs and simplifies PCB layout with single-chip display control. | Use Scenario: Battery-powered blood glucose meter or pulse oximeter requiring low-power operation and numeric LCD readout. IC Role / Device Role / Timing Role: System-on-chip handling analog sensor signal conditioning, ADC conversion, user interface, and LCD segment updates. Use Value: Sub-1 μA STOP mode extends battery life beyond 1 year; on-chip voltage regulator ensures stable LCD contrast across battery discharge curve. |
| Smart Energy Meters | Home Appliance Control Panels |
Use Scenario: Residential electricity meter with LCD display showing kWh, tariff, and time-of-use data. IC Role / Device Role / Timing Role: Main MCU executing metrology firmware, RTC management, tamper detection, and 4-mux LCD driving. Use Value: 288-segment LCD support enables multi-line alphanumeric display; Flash memory accommodates firmware updates and tariff tables. | Use Scenario: Microwave oven or washing machine control board with keypad and 4-digit LCD display. IC Role / Device Role / Timing Role: Real-time appliance state manager coordinating timers, relay control, buzzer, and LCD refresh. Use Value: Quasi-bidirectional I/O simplifies direct keypad scanning; built-in watchdog ensures fail-safe recovery during EMI events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller with LCD controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F104LEAFB#30 | RL78/G13-based; 32 KB Flash, 4 KB RAM, same 64-pin LQFP but different pinout and peripheral mapping | Requires PCB redesign due to non-pin-compatible I/O and LCD signal assignment | Suitable when migrating to newer RL78 architecture with lower power and enhanced debug features |
| UPD78F0533GA-GAD-AX | 78K0/LF3 variant with 128 KB Flash, identical pinout and LCD peripheral register compatibility | Drop-in replacement for higher code density needs; same footprint and initialization sequence | Preferred when application firmware exceeds 64 KB or requires future scalability |
Compared with UPD78F0485GK(R)-GAK-AX, R5F104LEAFB#30 offers improved active current (120 μA/MHz vs. 220 μA/MHz) but demands layout revision, while UPD78F0533GA-GAD-AX provides seamless Flash capacity upgrade within identical mechanical and electrical integration constraints.
Availability
UPD78F0485GK(R)-GAK-AX is available at Aetrix Electronics and suitable for industrial HMIs, portable medical instruments, and smart energy meters requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for UPD78F0485GK(R)-GAK-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 manufacturer headquartered in Japan, specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and consumer markets.
The 78K0/LF3 product line was designed for cost-sensitive, display-integrated embedded control applications requiring high reliability, low power, and mature toolchain support - particularly where LCD segment driving and Flash-based firmware updates are essential.
FAQ
What is the maximum LCD segment count supported by UPD78F0485GK(R)-GAK-AX?
The UPD78F0485GK(R)-GAK-AX supports up to 288 LCD segments using 4-multiplex drive with 8 COM lines and 36 SEG lines. This is achieved via dedicated on-chip LCD controller hardware that handles timing, bias generation, and frame rate control without CPU intervention. The UPD78F0485GK(R)-GAK-AX datasheet specifies this limit in Section 1.1 "Features" and Section 4.1.4 "LCD Controller Functions".
Does UPD78F0485GK(R)-GAK-AX include an internal voltage regulator for LCD bias?
Yes, the UPD78F0485GK(R)-GAK-AX includes an internal LCD voltage regulator controlled by the REGC pin. When REGC is driven high, the internal regulator generates VLCD from VDD; when low, external resistors connected to VLC0–VLC3 set the bias voltage. This dual-mode flexibility allows optimization for contrast stability or power efficiency. The UPD78F0485GK(R)-GAK-AX User's Manual (R01UH0180EJ0200) confirms this in Section 2.2.17 and Figure 2.23.
What development tools are officially supported for UPD78F0485GK(R)-GAK-AX firmware development?
UPD78F0485GK(R)-GAK-AX is fully supported by Renesas' legacy 78K0 toolchain: RA78K0 assembler (Ver. 4.01), CC78K0 C compiler (Ver. 4.00), ID78K0-QB debugger, and QB-MINI2 on-chip debug emulator. These tools are validated for Flash programming, real-time debugging, and peripheral register inspection. The UPD78F0485GK(R)-GAK-AX documentation references these tools in its "Related Documents" section (U17199E, U17200E, U18371E).
What is the Flash memory endurance rating for UPD78F0485GK(R)-GAK-AX?
The UPD78F0485GK(R)-GAK-AX features 64 KB of on-chip Flash memory rated for 100,000 write/erase cycles per block, with 128-byte sector erase granularity. This endurance specification is guaranteed under standard operating conditions (Ta = −20°C to +75°C, VDD = 2.7–5.5 V) and is documented in the Electrical Characteristics chapter of the UPD78F0485GK(R)-GAK-AX datasheet (Section 5.2, Table 5.1).
Is UPD78F0485GK(R)-GAK-AX qualified for automotive applications?
No, UPD78F0485GK(R)-GAK-AX is classified as a "Standard" quality grade device per Renesas' quality grading system (Notice #7), intended for office equipment, industrial robots, and home appliances - not transportation or safety-critical systems. Automotive-grade equivalents (e.g., RL78/F12 or RH850) require explicit AEC-Q100 qualification and extended temperature range support, which the UPD78F0485GK(R)-GAK-AX does not possess.
UPD78F0485GK(R)-GAK-AX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 80-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:
- 62
- 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:
UPD78F0485GK(R)-GAK-AX FAQ
1.How can I place an order for UPD78F0485GK(R)-GAK-AX through Aetrix?
Please submit a Request for Quotation (RFQ) for UPD78F0485GK(R)-GAK-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 UPD78F0485GK(R)-GAK-AX reliable?
The price and inventory of UPD78F0485GK(R)-GAK-AX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD78F0485GK(R)-GAK-AX is usually 5 days.
3.What payment methods are accepted for UPD78F0485GK(R)-GAK-AX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD78F0485GK(R)-GAK-AX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UPD78F0485GK(R)-GAK-AX?
UPD78F0485GK(R)-GAK-AX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UPD78F0485GK(R)-GAK-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 UPD78F0485GK(R)-GAK-AX?
For technical support, including UPD78F0485GK(R)-GAK-AX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD78F0485GK(R)-GAK-AX requirements.
6.How does Aetrix verify that UPD78F0485GK(R)-GAK-AX is sourced from the original manufacturer or authorized distributors?
All UPD78F0485GK(R)-GAK-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 UPD78F0485GK(R)-GAK-AX meets industry standards.
7.What is the process for return or replacement of UPD78F0485GK(R)-GAK-AX?
All UPD78F0485GK(R)-GAK-AX units undergo pre-shipment inspection (PSI). If there is an issue with UPD78F0485GK(R)-GAK-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 UPD78F0485GK(R)-GAK-AX part is unused and in its original packaging.
Return procedure for UPD78F0485GK(R)-GAK-AX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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