Renesas UPD78F0531AGB-GAH-AX

Overview

UPD78F0531AGB-GAH-AX from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/KE2 family, featuring 64 KB on-chip Flash memory, 4 KB RAM, and a maximum CPU clock of 20 MHz. It integrates a 10-bit A/D converter with 16 channels, UART, I²C, and timer modules, and targets embedded control in industrial sensors and motor drive interfaces.

For engineers reviewing the UPD78F0531AGB-GAH-AX datasheet, UPD78F0531AGB-GAH-AX pinout, UPD78F0531AGB-GAH-AX application, or UPD78F0531AGB-GAH-AX equivalent, key selection criteria include Flash endurance (100,000 erase/write cycles), operating voltage range (2.7–5.5 V), and support for on-chip debug via single-wire interface.

Technical Context

The UPD78F0531AGB-GAH-AX implements the 78K0 CPU core with 16-bit address space and supports instruction cycle times down to 50 ns at 20 MHz. Its peripheral set includes three 16-bit timer arrays (TAU), one watchdog timer (WDT), and a serial array unit (SAU) configurable as UART, CSI, or I²C.

It uses a single-supply architecture with internal voltage regulator (REGC pin), supports low-power modes (HALT, STOP), and features flash self-programming capability with library support for in-application firmware updates without external programming hardware.

Key Specifications

Pinout & Package

UPD78F0531AGB-GAH-AX 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 Renesas Hardware User's Manual Rev.4.01, Section 2.1.4 (78K0/KE2).

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F0531AGB-GAH-AX, R5F100LEAFB#30 offers lower active and standby current but lacks native UART/I²C multiplexing flexibility, while UPD78F0532AGB-GAH-AX provides seamless scalability within the same footprint and toolchain.

Availability

UPD78F0531AGB-GAH-AX is available at Aetrix Electronics and suitable for industrial sensor nodes, motor drive interfaces, and smart meter front-ends requiring stable component supply and long-term lifecycle assurance.

Supply support for UPD78F0531AGB-GAH-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/KE2 product line delivers cost-optimized 8-bit MCUs targeting resource-constrained embedded control applications where deterministic real-time response and Flash endurance are critical.

FAQ

What is the maximum operating frequency of the UPD78F0531AGB-GAH-AX?

The UPD78F0531AGB-GAH-AX supports a maximum system clock frequency of 20 MHz, achievable using either an external crystal (X1) up to 20 MHz or the internal high-speed oscillator calibrated to ±1% accuracy. At this frequency, the CPU executes instructions with a minimum cycle time of 50 ns, enabling deterministic real-time control loops in motor and sensor applications. The UPD78F0531AGB-GAH-AX maintains full peripheral functionality-including ADC sampling and UART transmission-at the rated maximum clock.

Does the UPD78F0531AGB-GAH-AX support in-system programming (ISP)?

Yes, the UPD78F0531AGB-GAH-AX supports in-system programming via its on-chip flash self-programming capability. Using Renesas' official Self Programming Library (SPL), firmware updates can be performed from within the running application without external programmers. This feature requires no special voltage or timing sequences beyond standard VDD and RESET handling, and the UPD78F0531AGB-GAH-AX retains full I/O and peripheral operation during programming - critical for field-upgradable industrial controllers.

What debug interface does the UPD78F0531AGB-GAH-AX use?

The UPD78F0531AGB-GAH-AX implements a single-wire debug (SWD) interface compliant with Renesas' standard on-chip debugging protocol. It requires only one dedicated pin (typically P120) plus VDD and GND for full visibility into CPU registers, memory, and real-time execution flow. Unlike JTAG, SWD minimizes pin count overhead and is supported natively by Renesas' E1/E20 emulators and QB-MINI2 tools - no additional debug bridge hardware is needed to use the UPD78F0531AGB-GAH-AX in development.

Is the UPD78F0531AGB-GAH-AX RoHS compliant and lead-free?

Yes, the UPD78F0531AGB-GAH-AX is RoHS compliant and lead-free, meeting EU Directive 2011/65/EU requirements. The "G" suffix in the part number denotes green (halogen-free) packaging, and the LQFP-100 package uses matte tin lead finish. Renesas confirms compliance through material declarations and third-party testing; full documentation is available in the UPD78F0531AGB-GAH-AX product change notification (PCN) and environmental compliance reports on the Renesas website.

How many A/D converter channels does the UPD78F0531AGB-GAH-AX support?

The UPD78F0531AGB-GAH-AX integrates a 10-bit successive-approximation A/D converter with 16 selectable input channels. These channels map to dedicated analog pins (AN0–AN15) distributed across multiple I/O ports and support simultaneous sampling control via software trigger or timer synchronization. Conversion time is guaranteed ≤1.2 μs per channel, and the UPD78F0531AGB-GAH-AX allows flexible reference selection between AVREF and internal 2.5 V bandgap - essential for precision sensor signal conditioning.