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Renesas UPD78F9456GK-9ET-A
- Part No.:
- UPD78F9456GK-9ET-A
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
UPD78F9456GK-9ET-A.pdf
- Description:
- IC MCU
- Quantity:
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Product details
Overview
UPD78F9456GK-9ET-A from NEC Electronics (now Renesas) is an 8-bit single-chip microcontroller in the 78K/0S Series, featuring 64 KB on-chip Flash memory, 4 KB RAM, and integrated peripherals including 16-bit Timer 90, UART, I²C, and LCD controller. It operates at up to 20 MHz system clock (fX), supports crystal/ceramic and RC oscillation modes, and targets embedded control in industrial HMI and appliance panels.
For engineers reviewing the UPD78F9456GK-9ET-A datasheet, UPD78F9456GK-9ET-A pinout, UPD78F9456GK-9ET-A application, or UPD78F9456GK-9ET-A equivalent, key selection considerations include its 100-pin LQFP package, VPP programming voltage requirement, mask-ROM-compatible Flash architecture, and dedicated LCD segment/driver support for low-power display interfaces.
Technical Context
The UPD78F9456GK-9ET-A implements the 78K/0S CPU core with 16-bit addressing, supporting up to 64 KB program memory space and 4 KB internal RAM. Its clock system includes main system oscillator (X1/X2, fX = 1–20 MHz), subsystem clock (XT1/XT2), and programmable divider circuits enabling flexible CPU clock derivation.
Peripheral integration includes a 16-bit Timer 90 with capture/compare/buzzer output modes, full-duplex UART with framing error detection, I²C bus interface with master/slave capability, and an 80-segment × 4-common LCD controller with internal bias generation - all mapped to dedicated SFRs and interrupt vectors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 78K/0S 8-bit CPU with 16-bit address bus and 8-bit data bus |
| Program Memory | 64 KB on-chip Flash (reprogrammable, VPP = 10 V required) |
| Data Memory | 4 KB on-chip RAM (high-speed internal SRAM) |
| Max System Clock | 20 MHz (crystal/ceramic mode, fX); supports RC oscillation via CL1/CL2 (mask option) |
| Operating Voltage | 2.7 V to 5.5 V - enables direct interface with legacy 5 V logic and battery-powered 3.3 V systems |
| LCD Support | 80-segment × 4-common static/dynamic drive with internal bias circuit and duty cycle control |
| Package | 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) - RoHS-compliant, surface-mount compatible |
Pinout & Package
UPD78F9456GK-9ET-A is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per User's Manual U15075EJ2V1UD, Sections 1.4.2 and 2.1–2.2, covering dual-voltage I/O ports, dedicated oscillator inputs (X1/X2, XT1/XT2), VPP programming terminal, and LCD segment/common drivers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VPP | Flash Programming Voltage Input | 10 V DC input required during Flash write/erase operations; not used in normal operation |
| X1, X2 | Main System Clock Oscillator Terminals | Connect external crystal/ceramic resonator (1–20 MHz); internal feedback circuit enables self-oscillation |
| XT1, XT2 | Subsystem Clock Oscillator Terminals | Support secondary timing source (e.g., 32.768 kHz watch crystal) for RTC or low-power wake-up |
| P00–P03 | Port 0 Pins | Bi-directional CMOS I/O with pull-up option; P00/P01 also serve as UART TXD/RXD |
| S0–S14 | LCD Segment Outputs | Drive up to 15 LCD segments directly; configured via LCD control registers and segment enable bits |
| COM0–COM3 | LCD Common Outputs | Drive up to 4 LCD commons; support static, 1/2, or 1/3 bias configurations |
Key Features
| Feature | Design Value |
|---|---|
| On-chip Flash with VPP programming | Enables field firmware updates without external EPROM programmer; requires 10 V on VPP pin during write cycles |
| Dedicated LCD controller | Reduces external component count for character/graphic displays; supports multiplexing up to 1/3 bias without external resistors |
| 16-bit Timer 90 with buzzer mode | Generates precise audio tones (e.g., keypad feedback) using internal PWM-like timing without CPU overhead |
| Full-duplex UART with framing error detection | Ensures robust serial communication in noisy industrial environments; detects invalid stop-bit transitions |
| I²C bus interface (master/slave) | Allows direct connection to EEPROMs, sensors, and real-time clocks using only two bidirectional pins (SCL/SDA) |
Applications
| Industrial HMI Panels | Home Appliance Control |
|---|---|
Use Scenario: Standalone control panel for HVAC systems with LED indicators, push-button inputs, and segmented LCD display. IC Role / Device Role / Timing Role: Primary system controller executing state-machine logic, managing user input scan, driving LCD segments, and coordinating serial communication with motor driver ICs. Use Value: Integrated LCD controller eliminates external driver IC; 64 KB Flash accommodates multi-language UI firmware and calibration tables. |
Use Scenario: Microwave oven main control board handling keypad scanning, cooking timer, power level regulation, and safety interlock monitoring. IC Role / Device Role / Timing Role: Central MCU managing real-time cooking sequence, interfacing with relay drivers, reading thermistor ADC inputs (via external ADC), and generating audible alerts via Timer 90 buzzer mode. Use Value: 20 MHz max clock ensures responsive button debounce and timer resolution; VPP-programmable Flash supports post-production calibration updates. |
| Smart Meter Display Modules | Medical Device Status Indicators |
Use Scenario: Secondary display unit in electricity/water meters showing consumption data, tariff info, and tamper alerts on 4-digit segmented LCD. IC Role / Device Role / Timing Role: Dedicated display controller receiving data over UART/I²C from metering SoC; drives LCD with built-in bias generation and segment mapping. Use Value: Low operating voltage (2.7 V) extends battery life in backup-powered displays; 100-pin LQFP provides ample GPIO for future feature expansion. |
Use Scenario: Front-panel indicator module in infusion pumps displaying flow rate, volume delivered, and alarm status via 8-segment alphanumeric LCD. IC Role / Device Role / Timing Role: Safety-monitored display controller with independent watchdog and reset supervision; isolates display logic from main therapy controller. Use Value: On-chip RAM retains display buffer during brief power dips; dedicated LCD hardware prevents flicker during CPU-intensive alarm processing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F100PLGSP#30 (RL78/G13) | 16-bit RL78 core, 64 KB Flash, 4 KB RAM, same 100-pin LQFP; no VPP pin; lower 1.6–5.5 V range | Modern replacement with enhanced ESD immunity and lower active current; lacks native LCD bias generation | Preferred for new designs requiring longer lifecycle support and higher reliability; requires external LCD bias or software-driven contrast control |
| UPD78F9436GK-9ET-A | Same family, 48 KB Flash (vs. 64 KB), identical pinout, peripherals, and package; shares same instruction set and SFR layout | Direct drop-in alternative where firmware size ≤48 KB; identical LCD, UART, and timer functionality | Select when code footprint allows reduction; enables cost optimization without redesign or requalification |
Compared with UPD78F9456GK-9ET-A, the R5F100PLGSP#30 offers superior power efficiency and toolchain longevity but requires external LCD bias circuitry, while UPD78F9436GK-9ET-A provides identical functionality at reduced memory capacity - making it ideal for firmware-shrink opportunities without hardware change.
Availability
UPD78F9456GK-9ET-A is available at Aetrix Electronics and suitable for industrial HMI panels, home appliance control boards, and smart meter display modules requiring stable component supply across extended production lifecycles.
Supply support for UPD78F9456GK-9ET-A 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
NEC Electronics Corporation (now part of Renesas Electronics) was a leading Japanese semiconductor manufacturer specializing in microcontrollers, analog ICs, and display drivers before its 2010 merger.
The UPD78F9456GK-9ET-A belongs to the 78K/0S Series - a family of 8-bit MCUs designed for cost-sensitive, low-power embedded control applications with integrated LCD and communication peripherals.
FAQ
What is the function of the VPP pin on the UPD78F9456GK-9ET-A?
The VPP pin on the UPD78F9456GK-9ET-A supplies 10 V DC during Flash memory programming and erase operations. It is not used during normal execution. This voltage enables Fowler-Nordheim tunneling for reliable write/erase cycles. The UPD78F9456GK-9ET-A must be held in programming mode (via specific reset and timing sequences) while VPP is applied; leaving VPP unconnected or floating during operation has no effect on runtime behavior.
Does the UPD78F9456GK-9ET-A support crystal oscillators above 10 MHz?
Yes, the UPD78F9456GK-9ET-A supports crystal/ceramic resonators up to 20 MHz on the X1/X2 pins, as confirmed in Section 5.4.1 of User's Manual U15075EJ2V1UD. Operation at 20 MHz requires proper PCB layout (short traces, ground guard ring, correct load capacitance), and the device maintains full peripheral functionality - including UART baud rate generation and LCD timing - across the entire 1–20 MHz range.
Can the UPD78F9456GK-9ET-A drive a 1/4-bias LCD?
No, the UPD78F9456GK-9ET-A's integrated LCD controller supports only static, 1/2-bias, and 1/3-bias configurations, as specified in Section 4.5.2 of the user manual. It does not provide hardware support for 1/4-bias waveforms or the required voltage dividers. Driving a 1/4-bias LCD would require external bias generation circuitry and software-controlled segment timing - negating the benefit of the on-chip LCD peripheral.
Is the UPD78F9456GK-9ET-A pin-compatible with other members of the µPD789456 subseries?
Yes, the UPD78F9456GK-9ET-A shares identical pin configuration and electrical characteristics with other µPD789456 subseries devices (e.g., µPD789455, µPD789456), as documented in Section 1.4.2 of U15075EJ2V1UD. All members use the same 100-pin LQFP package, pin functions, and I/O voltage tolerances - enabling hardware compatibility across Flash, ROM, and mask-ROM variants within the subseries.
What development tools are officially supported for the UPD78F9456GK-9ET-A?
Official development tools for the UPD78F9456GK-9ET-A include the IE-789456-NS-EM1 Emulation Board (U16289E), PG-FP4 Flash Memory Programmer (U15260E), and RA78K0S Assembler/CC78K0S C Compiler toolchains (U14876E/U14872E). These tools are validated for debugging, Flash programming, and firmware build workflows specific to the 78K/0S architecture and UPD78F9456GK-9ET-A's memory map.
UPD78F9456GK-9ET-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Obsolete
- 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:
UPD78F9456GK-9ET-A FAQ
1.How can I place an order for UPD78F9456GK-9ET-A through Aetrix?
Please submit a Request for Quotation (RFQ) for UPD78F9456GK-9ET-A 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 UPD78F9456GK-9ET-A reliable?
The price and inventory of UPD78F9456GK-9ET-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD78F9456GK-9ET-A is usually 5 days.
3.What payment methods are accepted for UPD78F9456GK-9ET-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD78F9456GK-9ET-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UPD78F9456GK-9ET-A?
UPD78F9456GK-9ET-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UPD78F9456GK-9ET-A 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 UPD78F9456GK-9ET-A?
For technical support, including UPD78F9456GK-9ET-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD78F9456GK-9ET-A requirements.
6.How does Aetrix verify that UPD78F9456GK-9ET-A is sourced from the original manufacturer or authorized distributors?
All UPD78F9456GK-9ET-A 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 UPD78F9456GK-9ET-A meets industry standards.
7.What is the process for return or replacement of UPD78F9456GK-9ET-A?
All UPD78F9456GK-9ET-A units undergo pre-shipment inspection (PSI). If there is an issue with UPD78F9456GK-9ET-A, 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 UPD78F9456GK-9ET-A part is unused and in its original packaging.
Return procedure for UPD78F9456GK-9ET-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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