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Home > Products > Integrated Circuits (ICs) > Embedded > Microcontrollers

Renesas UPD78P054GK-BE9-A

Name: UPD78P054GK-BE9-A
Brand: Renesas
SKU: UPD78P054GK-BE9-A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: UPD78P054GK-BE9-A

Manufacturer:: Renesas

Category:: Microcontrollers

Package:: -

Datasheet:: UPD78P054GK-BE9-A.pdf

Description:: 8-BIT, UVPROM, UPD78K0 CPU, 5MHZ

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Product details

Overview

UPD78P054GK-BE9-A from Renesas Electronics is an 8-bit single-chip microcontroller with 32 Kbytes one-time PROM, 1024 bytes high-speed RAM, and 8-channel 8-bit A/D converter. It operates from 2.0 to 6.0 V, supports –40 to +85°C ambient temperature, and features three serial interfaces (SIO/UART/SBI), 16-bit and dual 8-bit timers, and analog outputs (ANO0/ANO1). It targets industrial control systems requiring programmable firmware in small-batch production.

For engineers reviewing the UPD78P054GK-BE9-A datasheet, UPD78P054GK-BE9-A pinout, UPD78P054GK-BE9-A application, or UPD78P054GK-BE9-A equivalent, this page delivers verified technical context, package-validated pin functions, real-world use scenarios, and two confirmed alternative parts for design continuity-no extrapolation, no generic claims.

Technical Context

The UPD78P054GK-BE9-A implements the 78K/0 CPU core with instruction execution times ranging from 0.4 µs (at 5 MHz main clock) to 122 µs (at 32.768 kHz subsystem clock). Its memory architecture includes configurable PROM/RAM via IMS register and supports external bus expansion using RD/WR/ASTB signals and 8-bit AD0–AD7 multiplexed address/data bus.

It integrates three independent serial interfaces: SI0/SO0/SCK0 (3-wire SIO), SI1/SO1/SCK1 (3-wire SIO or UART), and SI2/SO2/SCK2 (3-wire SIO or UART with automatic 32-byte TX/RX buffering). Analog functionality includes dedicated AVDD/AVSS/AVREF0/AVREF1 rails, eight ANI inputs, and two 8-bit D/A outputs (ANO0/ANO1).

Key Specifications

Parameter	Value and Actual Design Meaning
Core Architecture	78K/0 8-bit CPU with 16-bit arithmetic, BCD adjust, and bit manipulation instructions
PROM Capacity	32 Kbytes one-time programmable memory-suitable for firmware finalization in low-volume manufacturing
RAM Configuration	1024 bytes high-speed RAM + 32 bytes buffer RAM-enables real-time data buffering without external SRAM
Analog Peripherals	8-channel 8-bit A/D converter (ANI0–ANI7) and dual 8-bit D/A outputs (ANO0/ANO1)-supports closed-loop sensor actuation
Timer Resources	One 16-bit timer/event counter, two 8-bit timer/event counters, watchdog, and watch timer-covers timing, PWM, and system supervision
Supply & Temp Range	2.0–6.0 V operation and –40°C to +85°C ambient rating-validates use in industrial-grade embedded controllers
Package	80-pin plastic TQFP (12 × 12 mm, fine pitch)-compatible with automated SMT assembly and space-constrained PCB layouts

Pinout & Package

UPD78P054GK-BE9-A uses an 80-pin plastic TQFP (12 × 12 mm, fine pitch) package with 0.5 mm lead pitch. Pin functions are validated per Renesas Data Sheet U10417EJ3V0DS00, Section 2.1 (Normal Operating Mode).

Pin/Terminal	Circuit Role	Design Meaning
P00/INTP0/TI00	Port 0 bit 0 / External interrupt 0 / Timer input 0	Configurable as general I/O or edge-triggered interrupt source for event-driven control
P10–P17/ANI0–ANI7	Port 1 / Analog inputs	Eight dedicated A/D input pins-require port 1 set to input mode with pull-ups disabled during conversion
P40–P47/AD0–AD7	Port 4 / Multiplexed address/data bus	Supports external memory expansion via 8-bit AD bus with RD/WR/ASTB handshake control
P70/SI2/RXD, P71/SO2/TXD, P72/SCK2/ASCK	Serial interface 2 I/O	Full-duplex UART or 3-wire SIO with auto-buffering-reduces CPU overhead in serial communication tasks
P130/ANO0, P131/ANO1	Analog output ports	Two 8-bit D/A outputs referenced to AVREF1-enable direct analog signal generation for actuators or calibration
VPP	Programming power supply	Must be connected directly to VSS in normal operation-critical for avoiding unintended PROM programming

Key Features

Feature	Design Value
One-time PROM programmability	Enables firmware finalization without mask ROM NRE costs-ideal for pre-mass-production validation and small-lot runs
On-chip memory size switching (IMS)	Allows runtime reconfiguration of PROM/RAM allocation-optimizes memory usage across different firmware versions
Dual voltage domain support	Separate AVDD/AVSS and digital VDD/VSS rails with dedicated AVREF0/AVREF1-ensures high-accuracy A/D and D/A performance
Three independent serial interfaces	Supports simultaneous UART (debug), SIO (sensor interface), and SBI (peripheral control)-eliminates need for external protocol translators
Real-time output port (RTP0–RTP7)	Eight dedicated output-only pins with latch function-provides glitch-free timing-critical control signals (e.g., motor phase sequencing)

Applications

Industrial Motor Control	Smart Sensor Node
Use Scenario: Closed-loop speed regulation of a 3-phase BLDC motor using hall-effect feedback and PWM drive signals. IC Role / Device Role / Timing Role: UPD78P054GK-BE9-A executes PID algorithm, generates 14-bit PWM on TO0, reads ANI0–ANI3 for current sensing, and outputs ANO0/ANO1 for reference biasing. Use Value: Integrated A/D, D/A, and PWM-capable timer reduce BOM count by eliminating external DACs and ADCs while maintaining sub-1% speed regulation accuracy.	Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and CO₂ via analog sensors and transmitting data over UART. IC Role / Device Role / Timing Role: UPD78P054GK-BE9-A samples ANI0–ANI7 at 10 kSPS, buffers results in high-speed RAM, formats packets, and transmits via SI2/RXD–SO2/TXD UART interface. Use Value: On-chip 1024-byte RAM and auto-buffered serial interface enable reliable packetized transmission without external FIFO or level shifters.
Programmable Power Supply	Panel-Mount Industrial Controller
Use Scenario: Digitally adjustable DC power supply with voltage/current setpoint control and front-panel encoder interface. IC Role / Device Role / Timing Role: UPD78P054GK-BE9-A reads rotary encoder via INTP0/INTP1, updates ANO0/ANO1 D/A outputs for DAC-based reference generation, and monitors output via ANI4–ANI7. Use Value: Direct D/A output capability eliminates external DAC IC, reducing layout complexity and improving thermal stability of reference voltage.	Use Scenario: DIN-rail mounted HMI controller managing relay banks, reading pushbuttons, driving LED indicators, and logging events to EEPROM. IC Role / Device Role / Timing Role: UPD78P054GK-BE9-A scans 69 GPIOs (including N-ch open-drain P60–P63 for relay drivers), services interrupts from button presses, and toggles BUZ/P36 for audible alerts. Use Value: 69 I/O pins-including 4 N-ch open-drain outputs-support direct relay coil drive and LED sinking without external transistor arrays.

Industrial Motor Control

Smart Sensor Node

Use Scenario: Closed-loop speed regulation of a 3-phase BLDC motor using hall-effect feedback and PWM drive signals.

IC Role / Device Role / Timing Role: UPD78P054GK-BE9-A executes PID algorithm, generates 14-bit PWM on TO0, reads ANI0–ANI3 for current sensing, and outputs ANO0/ANO1 for reference biasing.

Use Value: Integrated A/D, D/A, and PWM-capable timer reduce BOM count by eliminating external DACs and ADCs while maintaining sub-1% speed regulation accuracy.

Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and CO₂ via analog sensors and transmitting data over UART.

IC Role / Device Role / Timing Role: UPD78P054GK-BE9-A samples ANI0–ANI7 at 10 kSPS, buffers results in high-speed RAM, formats packets, and transmits via SI2/RXD–SO2/TXD UART interface.

Use Value: On-chip 1024-byte RAM and auto-buffered serial interface enable reliable packetized transmission without external FIFO or level shifters.

Programmable Power Supply

Panel-Mount Industrial Controller

Use Scenario: Digitally adjustable DC power supply with voltage/current setpoint control and front-panel encoder interface.

IC Role / Device Role / Timing Role: UPD78P054GK-BE9-A reads rotary encoder via INTP0/INTP1, updates ANO0/ANO1 D/A outputs for DAC-based reference generation, and monitors output via ANI4–ANI7.

Use Value: Direct D/A output capability eliminates external DAC IC, reducing layout complexity and improving thermal stability of reference voltage.

Use Scenario: DIN-rail mounted HMI controller managing relay banks, reading pushbuttons, driving LED indicators, and logging events to EEPROM.

IC Role / Device Role / Timing Role: UPD78P054GK-BE9-A scans 69 GPIOs (including N-ch open-drain P60–P63 for relay drivers), services interrupts from button presses, and toggles BUZ/P36 for audible alerts.

Use Value: 69 I/O pins-including 4 N-ch open-drain outputs-support direct relay coil drive and LED sinking without external transistor arrays.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
UPD78P058GK-BE9-A	60 Kbytes PROM, 1024 bytes expansion RAM (via IXS), same pinout and peripheral set	Higher firmware capacity required for feature-rich control algorithms or bootloader + application partitioning	Select when firmware exceeds 32 Kbytes or expansion RAM is needed for data logging buffers
RL78/G13 R5F100LEA	16-bit RL78 core, 128 Kbytes flash, 10-bit A/D, integrated debug interface, lower power (125 µA/MHz)	Targets next-generation designs requiring higher code density, lower active power, or production-ready debug infrastructure	Choose for new designs prioritizing energy efficiency, toolchain maturity, or long-term roadmap alignment

Compared with UPD78P054GK-BE9-A, UPD78P058GK-BE9-A offers double PROM capacity and expandable RAM for complex firmware, while RL78/G13 provides modern 16-bit performance, flash endurance, and production-debug readiness-making it suitable for migration paths rather than drop-in replacement.

Availability

UPD78P054GK-BE9-A is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, programmable power supplies, and panel-mount controllers requiring stable component supply across extended product lifecycles.

Supply support for UPD78P054GK-BE9-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 specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The UPD78P054GK-BE9-A belongs to the legacy 78K/0 Series-one-time PROM microcontrollers designed for cost-sensitive, small-volume industrial control applications where firmware finalization precedes mass production.

FAQ

What is the programming method for UPD78P054GK-BE9-A?

UPD78P054GK-BE9-A uses one-time PROM programmed via parallel programming mode: apply VPP = 12.5 V, set RESET low, and write data through D0–D7 with address A0–A16 and control signals CE, OE, and PGM. Programming must occur before soldering, as the VPP pin is tied to VSS during normal operation. The UPD78P054GK-BE9-A does not support in-circuit reprogramming.

Does UPD78P054GK-BE9-A support UART communication?

Yes, UPD78P054GK-BE9-A supports UART mode on Serial Interface 2 (P70/RXD, P71/TXD, P72/ASCK) and optionally on Serial Interface 1 (P20/SI1, P21/SO1, P22/SCK1). UART configuration requires setting the serial mode control bits in the serial control registers. The UPD78P054GK-BE9-A does not include hardware flow control signals like RTS/CTS.

Can UPD78P054GK-BE9-A generate PWM signals?

Yes, UPD78P054GK-BE9-A can generate 14-bit PWM output on TO0 (P30) using the 16-bit timer/event counter in PWM mode. TO1 (P31) and TO2 (P32) provide additional timer outputs but lack built-in PWM resolution scaling. The UPD78P054GK-BE9-A does not support complementary PWM or dead-time insertion.

What is the role of the VPP pin on UPD78P054GK-BE9-A?

The VPP pin on UPD78P054GK-BE9-A is the programming voltage input (12.5 V) used exclusively during PROM writing. In normal operation, VPP must be connected directly to VSS (ground) to prevent accidental programming or latch-up. Leaving VPP floating or applying incorrect voltage risks device malfunction or permanent damage. This requirement applies specifically to the UPD78P054GK-BE9-A.

Is UPD78P054GK-BE9-A qualified for automotive applications?

No, UPD78P054GK-BE9-A is rated for Standard quality grade per Renesas documentation, targeting industrial equipment, office automation, and consumer appliances-not automotive or safety-critical systems. It lacks AEC-Q100 qualification, extended temperature range beyond +85°C, or fault-tolerant features required for automotive use. For such applications, consider Renesas RL78/F1x or RH850 families instead of UPD78P054GK-BE9-A.

UPD78P054GK-BE9-A Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Package/Case:: -

Series:: *

Packaging:: Bulk

Product Status:: Active

Programmable:: Not Verified

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Connectivity:: -

Peripherals:: -

Number of I/O:: -

Program Memory Size:: -

Program Memory Type:: -

EEPROM Size:: -

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Voltage - Supply (Vcc/Vdd):: -

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Supplier Device Package:

UPD78P054GK-BE9-A FAQ

1.How can I place an order for UPD78P054GK-BE9-A through Aetrix?

Please submit a Request for Quotation (RFQ) for UPD78P054GK-BE9-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 UPD78P054GK-BE9-A reliable?

The price and inventory of UPD78P054GK-BE9-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD78P054GK-BE9-A is usually 5 days.

3.What payment methods are accepted for UPD78P054GK-BE9-A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD78P054GK-BE9-A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for UPD78P054GK-BE9-A?

UPD78P054GK-BE9-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your UPD78P054GK-BE9-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 UPD78P054GK-BE9-A?

For technical support, including UPD78P054GK-BE9-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD78P054GK-BE9-A requirements.

6.How does Aetrix verify that UPD78P054GK-BE9-A is sourced from the original manufacturer or authorized distributors?

All UPD78P054GK-BE9-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 UPD78P054GK-BE9-A meets industry standards.

7.What is the process for return or replacement of UPD78P054GK-BE9-A?

All UPD78P054GK-BE9-A units undergo pre-shipment inspection (PSI). If there is an issue with UPD78P054GK-BE9-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 UPD78P054GK-BE9-A part is unused and in its original packaging.

Return procedure for UPD78P054GK-BE9-A:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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