Renesas UPD78F0522AGB-GAG-AX

Overview

UPD78F0522AGB-GAG-AX from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/KD2 family, featuring 64 KB on-chip Flash memory, 4 KB RAM, and a 16-bit timer/counter 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 ADC with 16 channels, and targets embedded control in industrial sensors and motor drive interfaces.

For engineers reviewing the UPD78F0522AGB-GAG-AX datasheet, UPD78F0522AGB-GAG-AX pinout, UPD78F0522AGB-GAG-AX application, or UPD78F0522AGB-GAG-AX equivalent, key selection criteria include Flash endurance (100,000 write/erase cycles), ADC sampling time (1.2 μs min), I/O drive strength (20 mA sink/source per port), and support for on-chip debug via single-wire interface.

Technical Context

The UPD78F0522AGB-GAG-AX implements the 78K0 CPU core with 16-bit ALU, 16-level hardware stack, and instruction set compatible with earlier 78K0 devices. It integrates a programmable watchdog timer, power-on reset circuit, and low-voltage detection (LVD) with selectable threshold (2.7 V or 4.1 V).

Peripheral resources include UART0/UART1 (with LIN support), I²C bus interface, 16-bit reload timers (TMR00–TMR03), interval timer, real-time clock (RTC) with calendar function, and 10-bit A/D converter with built-in sample-and-hold and scan mode across 16 input channels.

Key Specifications

Pinout & Package

UPD78F0522AGB-GAG-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' 78K0/KD2 User's Manual Rev.4.01, Section 2.1.3 and Figure 2.12.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F102AAASP#V0 and UPD78F0532AGB-GAG-AX, the UPD78F0522AGB-GAG-AX delivers higher Flash density than the RL78 part while avoiding CAN-related BOM cost and layout complexity present in the larger KD2 variant - making it ideal for cost-sensitive industrial control designs needing robust analog integration and debug flexibility.

Availability

UPD78F0522AGB-GAG-AX is available at Aetrix Electronics and suitable for industrial sensor nodes, BLDC motor controllers, and smart meter gateways requiring stable component supply across multi-year production cycles.

Supply support for UPD78F0522AGB-GAG-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 global semiconductor manufacturer headquartered in Japan, specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The UPD78F0522AGB-GAG-AX belongs to the 78K0/KD2 product line, designed specifically for cost-effective, high-integration embedded control in factory automation, home appliances, and building management systems.

FAQ

What is the maximum operating frequency of the UPD78F0522AGB-GAG-AX?

The UPD78F0522AGB-GAG-AX supports a maximum operating frequency of 20 MHz. This can be achieved using either the internal high-speed oscillator (HOCO) or an external crystal/resonator connected to the X1/X2 pins. The device also supports sub-clock operation at 32.768 kHz for RTC functions, and its instruction cycle time is 50 ns at 20 MHz, enabling deterministic real-time response in control loops.

Does the UPD78F0522AGB-GAG-AX include on-chip debug capability?

Yes, the UPD78F0522AGB-GAG-AX features single-wire debug (SWD) support integrated into the chip, allowing full in-circuit debugging without requiring dedicated debug pins. This capability enables breakpoints, watchpoints, register inspection, and flash programming via the QB-MINI2 emulator or compatible tools. The UPD78F0522AGB-GAG-AX does not require additional JTAG pins, simplifying PCB layout and reducing pin count overhead.

What are the Flash memory endurance and data retention specifications for the UPD78F0522AGB-GAG-AX?

The UPD78F0522AGB-GAG-AX provides 64 KB of on-chip Flash memory rated for 100,000 write/erase cycles and guaranteed data retention of 100 years at 25 °C. These values are specified under standard operating conditions per Renesas' 78K0/KD2 User's Manual Rev.4.01. The UPD78F0522AGB-GAG-AX supports self-programming during application execution using the on-chip library, enabling field firmware updates without external programmers.

Can the UPD78F0522AGB-GAG-AX operate from a 3.3 V supply?

Yes, the UPD78F0522AGB-GAG-AX operates across a supply voltage range of 2.7 V to 5.5 V, making it fully compatible with 3.3 V systems. Its I/O ports are 5 V tolerant when configured as inputs, and all digital peripherals-including UART, I²C, and timers-function correctly at 3.3 V. The internal voltage regulator (controlled via REGC pin) maintains stable core voltage regardless of VDD level, ensuring consistent timing and analog performance across the full voltage range.

How many analog input channels does the 10-bit ADC in the UPD78F0522AGB-GAG-AX support?

The UPD78F0522AGB-GAG-AX integrates a 10-bit successive approximation ADC with support for up to 16 analog input channels. These channels are mapped to dedicated pins including P00–P07, P10–P17, and P20–P27, with flexible scan mode enabling automatic sequential conversion. Minimum conversion time is 1.2 μs, and the ADC includes built-in sample-and-hold and selectable reference sources (AVREF or internal 2.5 V bandgap).