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Renesas UPD78F0551MA-FAA-AX
- Part No.:
- UPD78F0551MA-FAA-AX
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 16-SSOP (0.173", 4.40mm Width)
- Datasheet:
-
UPD78F0551MA-FAA-AX.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,929
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Product details
Overview
UPD78F0551MA-FAA-AX from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/KY2-L family, featuring 64 KB on-chip Flash memory, 4 KB RAM, and a 20 MHz max CPU clock. It integrates UART, I²C, 16-bit timer/counters, ADC (8-channel, 10-bit), and operates from 2.7–5.5 V. It targets industrial control panels requiring deterministic real-time response and low-power operation.
For engineers reviewing the UPD78F0551MA-FAA-AX datasheet, UPD78F0551MA-FAA-AX pinout, UPD78F0551MA-FAA-AX application, or UPD78F0551MA-FAA-AX equivalent, key selection criteria include Flash endurance (100k write/erase cycles), built-in voltage regulator (REGC pin support), and compatibility with RA78K0 assembler toolchain for legacy code migration.
Technical Context
The UPD78F0551MA-FAA-AX implements the 78K0 CPU core with 16-bit address space and supports both ROM-based and RAM-based execution modes. Its clock system includes X1 (1–20 MHz crystal), XT1 (32.768 kHz watch crystal), and internal high-speed oscillator (HSO) options, with programmable prescalers for peripheral clocks.
It features a 10-bit successive-approximation ADC with sample-and-hold, conversion time of 1.2 μs per channel, and selectable reference sources (AVREF or VDD). The MCU supports three power-saving modes: HALT, STOP, and SNOOZE, with wake-up via external interrupt or timer event.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 78K0 8-bit CISC core with 16-bit address bus and 16-level hardware stack |
| Flash Memory | 64 KB on-chip Flash with 100,000 write/erase cycles; supports in-application programming (IAP) |
| RAM Size | 4 KB on-chip RAM with retention during STOP mode |
| Max Clock Speed | 20 MHz CPU clock derived from X1, XT1, or internal HSO; supports dynamic frequency switching |
| ADC Resolution | 10-bit SAR ADC with 8 input channels; conversion time ≤1.2 μs at 20 MHz clock |
| Supply Voltage | 2.7–5.5 V operation; internal voltage regulator (REGC) enables stable core voltage under varying VDD |
| I/O Pins | 52 general-purpose CMOS I/O pins with configurable pull-up, open-drain, and NMI capability |
Pinout & Package
UPD78F0551MA-FAA-AX is housed in a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignment follows JEDEC MS-026 standard and supports 5 V-tolerant inputs on designated ports.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD/VSS pairs ensure low-noise analog/digital separation; AVSS isolated for ADC reference stability |
| REGC | Voltage regulator control | Connects to external capacitor to stabilize internal 3.3 V regulator output for core logic |
| X1, X2 | Main system oscillator | Accepts 1–20 MHz crystal or external clock; X2 is output-only for feedback |
| XT1, XT2 | Sub-clock oscillator | Supports 32.768 kHz crystal for RTC and low-power wake-up timing |
| P00–P07 | Port 0 bidirectional I/O | Includes alternate functions: UART0 TX/RX, I²C SCL/SDA, and timer capture/compare outputs |
| AVREF | Analog reference input | Accepts external reference (1.5–5.5 V) or connects to VDD for ADC full-scale calibration |
Key Features
| Feature | Design Value |
|---|---|
| In-application programming (IAP) | Enables firmware updates over UART without external programmer; uses dedicated Flash sector for bootloader |
| Hardware watchdog timer (WDT) | Independent 14-bit down-counter with windowed enable; resets CPU if not refreshed within defined interval |
| Low-voltage detection (LVD) | Configurable trip points (2.5 V, 2.7 V, 3.0 V, 3.5 V); generates interrupt or reset on undervoltage condition |
| Real-time clock (RTC) | 32.768 kHz sub-clock domain with calendar function (year/month/day/hour/min/sec); retains time in STOP mode |
| EEPROM emulation library | Software library (U18275E) provides 1 KB emulated EEPROM using Flash with wear-leveling and error recovery |
Applications
| Industrial HMI Panel | Smart Sensor Node |
|---|---|
Use Scenario: Standalone operator interface for PLC-controlled machinery with button inputs, LED indicators, and serial communication to host controller. IC Role / Device Role / Timing Role: Main system controller executing state-machine logic, managing display refresh, and handling UART protocol framing. Use Value: 64 KB Flash accommodates GUI rendering routines and protocol stacks; 52 I/O pins directly drive LEDs and read tactile switches without external expanders. | Use Scenario: Battery-powered environmental sensor node measuring temperature, humidity, and ambient light, transmitting data via RS-485 every 30 seconds. IC Role / Device Role / Timing Role: System-on-chip controller performing ADC sampling, data preprocessing, and half-duplex UART-to-RS-485 translation. Use Value: STOP mode draws <1.5 μA; built-in LVD prevents data corruption during battery sag; 10-bit ADC resolves 0.1°C temperature steps. |
| Energy Meter Front-End | Appliance Motor Control |
Use Scenario: Residential electricity meter front-end digitizing current/voltage waveforms and computing RMS, active/reactive power via software algorithms. IC Role / Device Role / Timing Role: Signal acquisition and computation engine interfacing with isolation amplifiers and SPI flash for tariff storage. Use Value: 8-channel ADC supports simultaneous sampling across CT/PT inputs; 4 KB RAM buffers waveform samples for FFT processing. | Use Scenario: Washing machine drum motor controller using triac phase-angle firing, water level sensing, and user interface feedback. IC Role / Device Role / Timing Role: Real-time actuator coordinator managing zero-cross detection, PWM timing, and safety interlocks. Use Value: 16-bit timers provide precise 50/60 Hz zero-cross alignment; REGC pin ensures stable timing despite AC line fluctuations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F100PLAFB#30 | RL78/G13 core; 64 KB Flash, 4 KB RAM, but 32 MHz max clock and integrated debug interface (SWD) | Requires updated toolchain (CS+); lacks REGC pin and sub-clock oscillator pins (XT1/XT2) | Preferred for new designs needing higher performance and debug visibility; not drop-in compatible due to pinout and clock architecture differences |
| UPD78F0537GA-FAA-AX | Same 78K0/KY2-L family; 32 KB Flash, 2 KB RAM, identical pinout and peripheral set | Lower memory capacity limits complex UI or multi-protocol stacks | Drop-in replacement where application firmware fits within 32 KB Flash and requires no additional RAM |
Compared with UPD78F0551MA-FAA-AX, R5F100PLAFB#30 offers higher throughput and modern debug but sacrifices legacy-compatible clocking and voltage regulation; UPD78F0537GA-FAA-AX provides exact pin and register compatibility at reduced memory density for cost-sensitive volume production.
Availability
UPD78F0551MA-FAA-AX is available at Aetrix Electronics and suitable for industrial HMI panels, smart sensor nodes, and energy meter front-ends requiring stable component supply and long-term lifecycle support.
Supply support for UPD78F0551MA-FAA-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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.
The 78K0/KY2-L product line delivers cost-optimized 8-bit MCUs targeting legacy-compatible industrial control systems where deterministic timing, Flash endurance, and analog integration are critical.
FAQ
What is the maximum operating frequency of the UPD78F0551MA-FAA-AX?
The UPD78F0551MA-FAA-AX supports a maximum CPU clock frequency of 20 MHz. This is achieved using the external X1 oscillator (1–20 MHz crystal or clock source) or the internal high-speed oscillator (HSO) with programmable division. At 20 MHz, instruction execution time is 0.2 μs per basic instruction cycle, enabling real-time response in control loops and communication protocols.
Does the UPD78F0551MA-FAA-AX support in-system programming (ISP)?
Yes, the UPD78F0551MA-FAA-AX supports in-application programming (IAP) via its on-chip UART interface. Using the Renesas-provided IAP library, firmware updates can be performed without removing the device from the board. The UPD78F0551MA-FAA-AX reserves a dedicated Flash sector for the bootloader, ensuring safe overwrite of application code while maintaining system integrity.
What power-saving modes does the UPD78F0551MA-FAA-AX offer?
The UPD78F0551MA-FAA-AX provides three low-power modes: HALT (CPU stopped, peripherals active), STOP (CPU and most peripherals halted, RAM retained), and SNOOZE (selected peripherals like UART or ADC operate while CPU sleeps). In STOP mode, typical current consumption is below 1.5 μA at 25°C, making the UPD78F0551MA-FAA-AX suitable for battery-backed applications requiring extended standby duration.
Is the UPD78F0551MA-FAA-AX RoHS compliant?
Yes, the UPD78F0551MA-FAA-AX is RoHS compliant and meets EU Directive 2011/65/EU requirements. Renesas confirms lead-free finish (matte tin) on all package terminals and absence of restricted substances above threshold limits. Compliance documentation, including test reports and declarations, is available through Renesas' official product page and authorized distributors.
What development tools are supported for the UPD78F0551MA-FAA-AX?
The UPD78F0551MA-FAA-AX is supported by Renesas' legacy toolchain: RA78K0 assembler (Ver. 4.01), CC78K0 C compiler (Ver. 4.00), QB-MINI2 on-chip debugger, and PM+ IDE. Flash programming is performed via PG-FP5 programmer or QB-MINI2's built-in programming function. All tools and associated manuals (e.g., U17199E, U18371E) are documented in the UPD78F0551MA-FAA-AX hardware manual Rev.4.00.
UPD78F0551MA-FAA-AX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 16-SSOP (0.173", 4.40mm Width)
- Series:
- 78K0/Kx2-L
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- 78K/0
- Core Size:
- 8-Bit
- Speed:
- 10MHz
- Connectivity:
- I2C, LINbus, UART/USART
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 9
- Program Memory Size:
- 8KB (8K 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 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
UPD78F0551MA-FAA-AX FAQ
1.How can I place an order for UPD78F0551MA-FAA-AX through Aetrix?
Please submit a Request for Quotation (RFQ) for UPD78F0551MA-FAA-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 UPD78F0551MA-FAA-AX reliable?
The price and inventory of UPD78F0551MA-FAA-AX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD78F0551MA-FAA-AX is usually 5 days.
3.What payment methods are accepted for UPD78F0551MA-FAA-AX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD78F0551MA-FAA-AX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UPD78F0551MA-FAA-AX?
UPD78F0551MA-FAA-AX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UPD78F0551MA-FAA-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 UPD78F0551MA-FAA-AX?
For technical support, including UPD78F0551MA-FAA-AX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD78F0551MA-FAA-AX requirements.
6.How does Aetrix verify that UPD78F0551MA-FAA-AX is sourced from the original manufacturer or authorized distributors?
All UPD78F0551MA-FAA-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 UPD78F0551MA-FAA-AX meets industry standards.
7.What is the process for return or replacement of UPD78F0551MA-FAA-AX?
All UPD78F0551MA-FAA-AX units undergo pre-shipment inspection (PSI). If there is an issue with UPD78F0551MA-FAA-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 UPD78F0551MA-FAA-AX part is unused and in its original packaging.
Return procedure for UPD78F0551MA-FAA-AX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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