Renesas UPD78F0535AGK-GAJ-AX

Overview

UPD78F0535AGK-GAJ-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 (1–20 MHz), supports 10-bit A/D conversion across 16 channels, and includes UART, CSI, and I²C serial interfaces. It targets embedded control in industrial sensors and motor-driven appliances.

For engineers reviewing the UPD78F0535AGK-GAJ-AX datasheet, UPD78F0535AGK-GAJ-AX pinout, UPD78F0535AGK-GAJ-AX application, or UPD78F0535AGK-GAJ-AX equivalent, key selection criteria include Flash endurance (100,000 write/erase cycles), A/D sampling time (1.2 μs min), TAU PWM resolution (16-bit), operating voltage range (2.7–5.5 V), and QFP-100 package compatibility with industrial temperature grade (−40°C to +85°C).

Technical Context

The UPD78F0535AGK-GAJ-AX implements the 78K0 CPU core with 16-bit addressing and 8-bit ALU, executing instructions in 1–4 clock cycles. Its on-chip peripheral set includes a 16-channel 10-bit successive-approximation A/D converter with programmable sample-and-hold timing, dual UART modules supporting asynchronous communication at up to 2 Mbps, and a 3-channel TAU capable of complementary PWM generation with dead-time insertion.

It integrates a 32-bit watchdog timer with independent clock source, power-on reset circuitry with adjustable delay, and low-voltage detection (LVD) with three selectable threshold levels (4.2 V, 3.8 V, 3.3 V). The device uses Renesas' SuperFlash® technology for Flash memory, enabling single-cycle erase and byte-level programming with guaranteed data retention for 20 years.

Key Specifications

Pinout & Package

UPD78F0535AGK-GAJ-AX is housed in a 100-pin plastic quad flat package (QFP) with 0.5 mm lead pitch, compliant with JEDEC MS-026. The package supports surface-mount reflow assembly and provides full I/O access including dedicated A/D input pins, serial interface signals, and TAU PWM outputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F0535AGK-GAJ-AX, R5F100PLGSP#30 offers superior energy efficiency but sacrifices hardware PWM safety features, while UPD78F0537AGK-GAJ-AX delivers seamless scalability within the same pinout and toolchain - making it the only drop-in-capable alternative.

Availability

UPD78F0535AGK-GAJ-AX is available at Aetrix Electronics and suitable for industrial sensor nodes, appliance motor controllers, building automation panels, and POS peripheral interfaces requiring stable component supply and long-term production continuity.

Supply support for UPD78F0535AGK-GAJ-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 was designed for cost-sensitive, high-reliability embedded control applications demanding integrated analog peripherals, deterministic real-time response, and long-lifecycle support - particularly in factory automation and white goods.

FAQ

What is the maximum operating frequency of the UPD78F0535AGK-GAJ-AX?

The UPD78F0535AGK-GAJ-AX supports a maximum system clock frequency of 20 MHz, achievable using either the internal high-speed oscillator (with ±1% accuracy at 25°C) or an external crystal connected to X1/X2 pins. At this speed, instruction execution ranges from 1 to 4 clock cycles per instruction, delivering up to 20 MIPS throughput. The device maintains full functionality across its specified voltage range (2.7–5.5 V) and temperature range (−40°C to +85°C).

Does the UPD78F0535AGK-GAJ-AX support in-system programming (ISP)?

Yes, the UPD78F0535AGK-GAJ-AX supports in-system programming via its on-chip self-programming library (SPL), which allows Flash memory updates using standard UART or CSI interfaces without removing the device from the target board. The SPL implements error-checking routines and supports sector-wise erase and byte-wise write operations, enabling secure field firmware upgrades while preserving critical configuration data in protected memory regions.

How many A/D input channels does the UPD78F0535AGK-GAJ-AX have, and what is their resolution?

The UPD78F0535AGK-GAJ-AX integrates a 10-bit successive-approximation A/D converter with 16 configurable input channels (AN0–AN15), each mapped to dedicated port pins or shared with digital I/O functions. Conversion time is as fast as 1.2 μs under optimal conditions (VDD = 5.0 V, f_CLK = 20 MHz), and the module supports software-triggered, timer-triggered, or external-edge-triggered conversions with programmable sample-and-hold timing.

What serial communication interfaces are built into the UPD78F0535AGK-GAJ-AX?

The UPD78F0535AGK-GAJ-AX includes two UART modules (UART0 and UART1), one CSI (Clock Synchronous Interface), and one I²C interface. UART0 and UART1 support asynchronous communication up to 2 Mbps with independent baud rate generators, automatic direction control for RS-485, and FIFO buffers. CSI operates in master/slave mode for SPI-like protocols, while the I²C interface complies with standard and fast-mode specifications (up to 400 kbps).

Is the UPD78F0535AGK-GAJ-AX pin-compatible with other members of the 78K0/KE2 family?

Yes, the UPD78F0535AGK-GAJ-AX shares the same 100-pin QFP package and pin assignment with other 78K0/KE2 devices including UPD78F0531AGK-GAJ-AX through UPD78F0537AGK-GAJ-AX. This enables hardware reuse across variants differing in Flash size (32–96 KB), RAM capacity (2–4 KB), and peripheral channel count - allowing design scalability without PCB redesign. Pin mapping for power, reset, clocks, and core peripherals remains identical across the family.