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Renesas UPD78F9418AGC-8BT-A
- Part No.:
- UPD78F9418AGC-8BT-A
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 80-LQFP
- Datasheet:
-
UPD78F9418AGC-8BT-A.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,255
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Product details
Overview
UPD78F9418AGC-8BT-A from Renesas Electronics is an 8-bit Flash-based microcontroller in the 78K/0S family, featuring 128 KB on-chip Flash memory, 8 KB RAM, and integrated LCD controller supporting up to 160 segments. It operates at up to 20 MHz with supply voltage range 2.7–5.5 V and includes 10-bit ADC (8 channels), UART, I²C, and 16-bit timers. It targets embedded control in industrial HMI and instrumentation panels.
For engineers reviewing the UPD78F9418AGC-8BT-A datasheet, UPD78F9418AGC-8BT-A pinout, UPD78F9418AGC-8BT-A application, or UPD78F9418AGC-8BT-A equivalent, key selection considerations include its segment LCD driver capability, Flash reprogrammability, 10-bit ADC resolution, and compatibility with Renesas' RA78K0S toolchain for firmware development and debugging.
Technical Context
This MCU implements the 78K/0S CPU core with Harvard architecture, supporting 16-bit addressing for program space and 8-bit addressing for data space. It integrates a programmable LCD controller with internal bias generation (VLC0–VLC2, COM0–COM3) and supports static to 1/4-duty drive modes.
The device includes dual clock systems: main high-speed oscillator (X1/X2, up to 20 MHz) and sub-oscillator (XT1/XT2) for real-time clock operation. Its reset circuit supports both external active-low RESET input and internal power-on reset with built-in voltage detector (VDD = 2.7 V threshold).
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 |
| Flash Memory | 128 KB on-chip Flash, supporting in-system programming (ISP) via UART or dedicated VPP pin |
| RAM Size | 8 KB on-chip RAM, including 256-byte special function register (SFR) area |
| ADC Resolution | 10-bit successive approximation ADC with 8 input channels and ±1 LSB integral nonlinearity |
| LCD Drive Capability | Supports up to 160 segments via 4 commons and 3 bias voltages (VLC0–VLC2); no external bias resistor required |
| Operating Voltage | 2.7 V to 5.5 V - enables direct interface with 3.3 V or 5 V logic and battery-powered operation |
| Max Clock Frequency | 20 MHz main system clock - delivers 10 MIPS throughput at 20 MHz with single-cycle instruction execution |
Pinout & Package
UPD78F9418AGC-8BT-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 U13952EJ3V1UD, Chapter 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD0, VDD1 | Power supply (digital) | Dual VDD pins reduce IR drop and improve noise immunity across wide I/O banks |
| VSS0, VSS1 | GND (digital) | Separate ground returns minimize coupling between analog and digital sections |
| AVDD, AVSS | Analog power/ground | Isolated analog domain supplies for ADC and internal reference stability |
| AVREF | Analog reference input | External reference voltage input for ADC; internally selectable as VDD or external source |
| P00–P03 | Port 0 pins | General-purpose I/O with N-ch open-drain output capability; usable as UART TX/RX or I²C SDA/SCL |
| S0–S15 | Segment outputs | 16 dedicated segment drivers for LCD; support multiplexed drive up to 1/4 duty |
| COM0–COM3 | Common outputs | 4 common-line drivers for LCD; paired with S0–S15 to enable 160-segment display |
| VPP | Programming voltage | 5.5 V input required during Flash write/erase operations - enables in-circuit reprogramming |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LCD controller | Drives up to 160 segments without external bias circuitry or external driver IC |
| On-chip Flash with ISP | Enables field firmware updates via UART or dedicated VPP pin - no socket or UV eraser needed |
| Dual clock system | Allows simultaneous use of high-speed main oscillator (20 MHz) and low-power sub-oscillator (32.768 kHz) for RTC |
| 10-bit ADC with hardware averaging | Supports 4× hardware averaging mode to improve effective resolution by ~1 bit in noisy environments |
| Low-voltage detection (LVD) | Built-in voltage monitor triggers interrupt or reset at 2.7 V threshold - prevents erratic operation during brownout |
Applications
| Industrial Panel Meters | Programmable Logic Controllers (PLC) I/O Modules |
|---|---|
Use Scenario: Standalone digital panel meter measuring temperature, pressure, or flow with local display and serial communication. IC Role / Device Role / Timing Role: Main system controller executing measurement acquisition, linearization, LCD rendering, and Modbus RTU protocol stack. Use Value: Integrated 10-bit ADC and 160-segment LCD driver eliminate external components, reducing BOM count and PCB area by ≥30% versus discrete solutions. | Use Scenario: Compact remote I/O module converting analog sensor inputs to digital signals for central PLC via RS-485. IC Role / Device Role / Timing Role: Sensor interface MCU handling signal conditioning, isolation-aware UART framing, and watchdog-managed fault reporting. Use Value: Dual clock system allows continuous RTC timestamping of alarms while maintaining full 20 MHz processing for real-time I/O scanning. |
| Medical Diagnostic Equipment UI | Building Automation Thermostats |
Use Scenario: Front-panel interface for portable blood glucose analyzers or ECG monitors requiring clear segment-based display and button-driven navigation. IC Role / Device Role / Timing Role: Dedicated UI controller managing tactile feedback, segment LCD refresh, and secure local data logging to Flash. Use Value: On-chip Flash supports encrypted firmware updates and patient data storage - meets IEC 62304 Class B software lifecycle requirements. | Use Scenario: Wireless thermostat with local LCD, temperature/humidity sensing, and Zigbee/Thread radio coexistence. IC Role / Device Role / Timing Role: System manager coordinating sensor reads, display update, radio sleep/wake scheduling, and battery voltage monitoring. Use Value: Low-voltage detection (2.7 V threshold) and Flash endurance (>10k erase/write cycles) ensure reliable operation over 10-year battery life in HVAC deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F100LEAFB#30 | RL78/G13-based; 32 KB Flash, 4 KB RAM, no integrated LCD driver | Requires external LCD driver IC or segment-mapped GPIO; lower memory but higher code efficiency | Select when migrating to newer RL78 platform with toolchain continuity and lower power consumption |
| UPD78F9234GC-8BT-A | Same 78K/0S family; 64 KB Flash, 4 KB RAM, supports only 80-segment LCD | Half the segment drive capacity and reduced memory - suitable for simpler displays | Select when cost sensitivity outweighs display complexity and firmware scalability needs |
Compared with R5F100LEAFB#30 and UPD78F9234GC-8BT-A, the UPD78F9418AGC-8BT-A uniquely balances high-segment LCD integration, large Flash capacity, and legacy 78K/0S ecosystem support - making it optimal for sustaining existing industrial HMI designs requiring >100-segment displays and field-upgradable firmware.
Availability
UPD78F9418AGC-8BT-A is available at Aetrix Electronics and suitable for industrial panel meters, building automation thermostats, and medical diagnostic equipment UIs requiring stable component supply and long-term production continuity.
Supply support for UPD78F9418AGC-8BT-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
Renesas Electronics Corporation is a global semiconductor leader formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices.
The UPD78F9418AGC-8BT-A belongs to the 78K/0S microcontroller family, designed specifically for cost-sensitive, display-intensive embedded applications in industrial and healthcare equipment where Flash programmability and integrated LCD control reduce system-level complexity.
FAQ
What is the maximum LCD segment count supported by UPD78F9418AGC-8BT-A?
The UPD78F9418AGC-8BT-A supports up to 160 segments using its integrated LCD controller with 4 commons (COM0–COM3) and 16 segment outputs (S0–S15). This configuration enables 1/4-duty drive mode, allowing efficient multiplexed display control without external bias circuitry or driver ICs - a key differentiator for compact HMI designs.
Does UPD78F9418AGC-8BT-A support in-system programming (ISP)?
Yes, UPD78F9418AGC-8BT-A supports in-system programming via its dedicated VPP pin (pin 99) and UART interface. Flash memory can be reprogrammed in-circuit using standard serial protocols and Renesas' PG-FP4 programmer or compatible tools - eliminating the need for socket-based programming or UV erasure.
What is the operating voltage range for UPD78F9418AGC-8BT-A?
The UPD78F9418AGC-8BT-A operates across a supply voltage range of 2.7 V to 5.5 V. This wide range accommodates both 3.3 V and 5 V system designs and ensures robust operation under battery discharge or unregulated supply conditions - validated per Electrical Specifications in Chapter 21 of User's Manual U13952EJ3V1UD.
How many ADC channels does UPD78F9418AGC-8BT-A include, and what is their resolution?
The UPD78F9418AGC-8BT-A includes 8 analog input channels with a 10-bit successive approximation ADC. Its typical integral nonlinearity is ±1 LSB, and it supports hardware averaging across up to four conversions to enhance effective resolution in electrically noisy environments - critical for precision sensor interfacing.
Is UPD78F9418AGC-8BT-A pin-compatible with other members of the 78K/0S family?
No, UPD78F9418AGC-8BT-A is not pin-compatible with other 78K/0S devices such as µPD789417A or µPD78F9234GC-8BT-A due to differences in pin assignment for LCD segment outputs (S0–S15), commons (COM0–COM3), and VPP. Its 100-pin LQFP layout is specific to the UPD78F9418A variant - verified in Chapter 1.4 (Pin Configuration) of User's Manual U13952EJ3V1UD.
UPD78F9418AGC-8BT-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 80-LQFP
- Series:
- 78K/UPD7894xx
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 78K0S
- Core Size:
- 8-Bit
- Speed:
- 5MHz
- Connectivity:
- 3-Wire SIO, UART/USART
- Peripherals:
- LCD, WDT
- Number of I/O:
- 36
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 7x10b
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
UPD78F9418AGC-8BT-A FAQ
1.How can I place an order for UPD78F9418AGC-8BT-A through Aetrix?
Please submit a Request for Quotation (RFQ) for UPD78F9418AGC-8BT-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 UPD78F9418AGC-8BT-A reliable?
The price and inventory of UPD78F9418AGC-8BT-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD78F9418AGC-8BT-A is usually 5 days.
3.What payment methods are accepted for UPD78F9418AGC-8BT-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD78F9418AGC-8BT-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UPD78F9418AGC-8BT-A?
UPD78F9418AGC-8BT-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UPD78F9418AGC-8BT-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 UPD78F9418AGC-8BT-A?
For technical support, including UPD78F9418AGC-8BT-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD78F9418AGC-8BT-A requirements.
6.How does Aetrix verify that UPD78F9418AGC-8BT-A is sourced from the original manufacturer or authorized distributors?
All UPD78F9418AGC-8BT-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 UPD78F9418AGC-8BT-A meets industry standards.
7.What is the process for return or replacement of UPD78F9418AGC-8BT-A?
All UPD78F9418AGC-8BT-A units undergo pre-shipment inspection (PSI). If there is an issue with UPD78F9418AGC-8BT-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 UPD78F9418AGC-8BT-A part is unused and in its original packaging.
Return procedure for UPD78F9418AGC-8BT-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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