Renesas UPD78F0535AFC-AA1-A

Overview

UPD78F0535AFC-AA1-A 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 20 MHz maximum CPU clock. It integrates 10-bit ADC (8 channels), UART, I²C, and 16-bit timer arrays, and operates across industrial temperature range (−40°C to +85°C) with supply voltage 2.7–5.5 V. It is used in motor control subsystems for HVAC blowers and appliance pump drivers.

For engineers reviewing the UPD78F0535AFC-AA1-A datasheet, UPD78F0535AFC-AA1-A pinout, UPD78F0535AFC-AA1-A application, or UPD78F0535AFC-AA1-A equivalent, key selection criteria include flash endurance (100,000 erase/write cycles), ADC conversion time (1.2 μs typical), interrupt latency (2.5 μs min), and support for on-chip self-programming library v1.0.

Technical Context

The UPD78F0535AFC-AA1-A implements the 78K0 CPU core with 16-bit address bus and Harvard architecture, supporting 131 instructions including bit manipulation and multiplication. Its peripheral set includes three 16-bit timer arrays (each with capture/compare/PWM output), a serial array unit (SAU) configurable as UART/I²C/SPI, and a 10-bit successive-approximation ADC with internal reference and sample-and-hold.

It uses a single-phase external crystal (X1) or ceramic resonator (1–20 MHz) for main system clock, with optional PLL for internal clock multiplication. Power management includes HALT and STOP modes with wake-up via external interrupt or timer event, achieving 1.2 μA standby current at VDD = 3.3 V.

Key Specifications

Pinout & Package

UPD78F0535AFC-AA1-A is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package 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 UPD78F0535AFC-AA1-A, R5F100LEAFB#30 offers smaller footprint but reduced peripheral flexibility, while STM8S208MBT6 delivers greater memory headroom at the cost of increased firmware development complexity for secure field updates.

Availability

UPD78F0535AFC-AA1-A is available at Aetrix Electronics and suitable for motor control subsystems, industrial sensor nodes, smart appliance pump drivers, and factory automation I/O modules requiring stable component supply and long-term lifecycle support.

Supply support for UPD78F0535AFC-AA1-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 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 requiring deterministic real-time performance, integrated analog peripherals, and robust flash endurance-particularly in white goods and industrial equipment.

FAQ

What is the maximum operating frequency and corresponding instruction cycle time for the UPD78F0535AFC-AA1-A?

The UPD78F0535AFC-AA1-A supports a maximum CPU clock frequency of 20 MHz, resulting in a minimum instruction cycle time of 50 ns for most instructions. This timing assumes use of the on-chip oscillator with external crystal (X1) or ceramic resonator, and accounts for internal clock division settings per the system clock control register (CKC). The UPD78F0535AFC-AA1-A achieves this performance across its full industrial temperature range (−40°C to +85°C) with supply voltage between 2.7 V and 5.5 V.

Does the UPD78F0535AFC-AA1-A support in-system programming (ISP) without external hardware tools?

Yes, the UPD78F0535AFC-AA1-A supports in-application programming via its on-chip self-programming library (SPL) Type 01, allowing firmware updates through UART or other serial interfaces without requiring external programmers like PG-FP5. The SPL provides verified routines for flash erase, write, and verification, with interrupt-safe operation and checksum validation. This capability is integral to the UPD78F0535AFC-AA1-A design and does not depend on external debug hardware.

What are the ADC input voltage range and reference options for the UPD78F0535AFC-AA1-A?

The UPD78F0535AFC-AA1-A ADC accepts analog inputs from AVSS to AVREF, with AVREF configurable as either internal 2.5 V reference or externally supplied voltage (up to VDD). The input range is rail-to-rail relative to the selected reference, and the 10-bit conversion result is right-aligned in the ADRES register. Input channels AN0–AN7 are mapped to P20–P27, and the ADC supports software/start-triggered conversions with programmable sample-and-hold time.

How many independent PWM outputs can the UPD78F0535AFC-AA1-A generate simultaneously?

The UPD78F0535AFC-AA1-A can generate up to 12 independent PWM outputs simultaneously using its three 16-bit timer array units (TAU0, TAU1, TAU2), each providing four output channels. Each channel supports complementary PWM with programmable dead-time insertion, center-aligned or edge-aligned modes, and synchronous start/stop control. These capabilities are implemented in hardware and do not require CPU intervention during waveform generation, making them suitable for motor drive applications.

Is the UPD78F0535AFC-AA1-A qualified for automotive applications?

No, the UPD78F0535AFC-AA1-A is rated for Standard quality grade per Renesas documentation, intended for industrial, office, and consumer applications such as HVAC systems, appliances, and test equipment. It is not qualified to AEC-Q100 or designated for automotive use. For automotive-grade alternatives, Renesas offers the RL78/F1x or RH850 families, which include extended temperature range, enhanced ESD immunity, and automotive-specific qualification testing not present in the UPD78F0535AFC-AA1-A.