Renesas UPD78F0536AGB-GAH-AX

Overview

UPD78F0536AGB-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 16-bit timer array unit (TAU) with PWM output capability. It operates at up to 20 MHz using an internal high-speed oscillator or external crystal, supports 10-bit A/D conversion across 16 channels, and targets embedded control applications requiring deterministic real-time response and low-power operation.

For engineers reviewing the UPD78F0536AGB-GAH-AX datasheet, UPD78F0536AGB-GAH-AX pinout, UPD78F0536AGB-GAH-AX application, or UPD78F0536AGB-GAH-AX equivalent, key selection criteria include its 100-pin LQFP package, integrated voltage regulator (REGC pin), dual watchdog timers (WDT and IWDT), and support for on-chip debug via QB-MINI2 interface - all critical for industrial motor control, sensor-based automation, and appliance subsystem design.

Technical Context

The UPD78F0536AGB-GAH-AX implements the 78K0 CPU core with 16-bit addressing and 119 basic instructions, executing most instructions in 1–2 clock cycles. Its peripheral set includes a serial array unit (SAU) supporting UART, CSI, and I²C modes; a 16-bit interval timer; and a 10-bit A/D converter with sample-and-hold and automatic channel scanning.

It integrates a programmable low-voltage detection (LVD) circuit, power-on reset (POR), and dual watchdog timers - one standard WDT and one independent IWDT - enabling robust fault recovery in safety-critical embedded systems without external supervision circuitry.

Key Specifications

Pinout & Package

This device is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad, rated for industrial temperature range (−40°C to +85°C) and RoHS-compliant finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F0536AGB-GAH-AX, R5F104PJAFP#30 offers newer architecture and LIN support but sacrifices dual-WDT reliability and REGC-based power simplicity, while UPD78F0537AGB-GAH-AX delivers direct feature extension within the same footprint and toolchain - making it the preferred choice for incremental functional scaling.

Availability

UPD78F0536AGB-GAH-AX is available at Aetrix Electronics and suitable for industrial motor control, home appliance subsystems, and building automation sensor nodes requiring stable component supply over extended production lifecycles.

Supply support for UPD78F0536AGB-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, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The 78K0/KE2 product line was designed for cost-sensitive, high-reliability embedded control applications demanding deterministic real-time performance, low-power operation, and long-term supply stability - particularly in white goods, factory I/O, and HVAC systems.

FAQ

What is the maximum operating frequency of the UPD78F0536AGB-GAH-AX?

The UPD78F0536AGB-GAH-AX supports a maximum operating frequency of 20 MHz. This can be achieved using either the internal high-speed oscillator (with ±1% accuracy after calibration) or an external crystal connected to the X1/X2 pins. The actual achievable frequency depends on supply voltage and ambient temperature, with full 20 MHz operation guaranteed across the industrial temperature range (−40°C to +85°C) at VDD ≥ 4.5 V.

Does the UPD78F0536AGB-GAH-AX include an internal voltage regulator?

Yes, the UPD78F0536AGB-GAH-AX includes an internal voltage regulator controlled by the REGC pin. When a 1.0 μF capacitor is connected between REGC and EVSS, the regulator generates a stable 3.3 V supply for the CPU core and internal peripherals. This eliminates the need for an external LDO in many designs and simplifies power sequencing - a key feature distinguishing it from earlier 78K0 variants without REGC support.

How many A/D input channels does the UPD78F0536AGB-GAH-AX support?

The UPD78F0536AGB-GAH-AX supports 16 analog input channels for its 10-bit successive-approximation A/D converter. These channels are mapped across ports P0 through P7 and include dedicated pins such as P05–P06, P10–P17, and P20–P23. The A/D unit features sample-and-hold, hardware averaging (up to 4 samples), and automatic channel scanning - all accessible without CPU intervention via the on-chip peripheral event controller.

Is the UPD78F0536AGB-GAH-AX pin-compatible with other 78K0/KE2 devices?

Yes, the UPD78F0536AGB-GAH-AX is pin-compatible with other 100-pin LQFP variants in the 78K0/KE2 family, including UPD78F0531AGB-GAH-AX through UPD78F0537AGB-GAH-AX. All share identical pin functions, electrical characteristics, and package dimensions. This allows hardware reuse across different memory sizes and peripheral configurations - for example, upgrading to UPD78F0537AGB-GAH-AX adds one A/D channel and one SAU channel without PCB changes.

What debug interface does the UPD78F0536AGB-GAH-AX support?

The UPD78F0536AGB-GAH-AX supports single-wire on-chip debug (SWOCD) via the RES# pin, fully compatible with Renesas QB-MINI2 and QB-78K0KX2 emulators. This interface enables non-intrusive real-time debugging, including breakpoints, watchpoints, and memory inspection, without consuming dedicated debug pins or affecting normal I/O functionality - a critical advantage for space-constrained industrial designs relying on all 100 pins for system interfacing.