Renesas UPD78F0566MC-CAA-AX

Overview

UPD78F0566MC-CAA-AX from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/KA2-L family, featuring 64 KB on-chip Flash memory, 4 KB RAM, and a 20 MHz max CPU clock. It integrates UART, I²C, 16-bit timer/counters, ADC (8-channel, 10-bit), and operates from 2.7 V to 5.5 V. It targets industrial control panels requiring deterministic real-time response and low-power operation.

For engineers reviewing the UPD78F0566MC-CAA-AX datasheet, UPD78F0566MC-CAA-AX pinout, UPD78F0566MC-CAA-AX application, or UPD78F0566MC-CAA-AX equivalent, key selection criteria include Flash endurance (100k write/erase cycles), ADC sampling rate (up to 100 kSPS), and support for low-power stop modes with wake-up via external interrupt or RTC alarm - critical for battery-backed sensor nodes and programmable logic controllers.

Technical Context

The UPD78F0566MC-CAA-AX implements the 78K0 CPU core with 16-bit address space and 8-bit data path, supporting 131 instructions including bit manipulation and conditional skip. Its clock system supports multiple sources: high-speed X1 oscillator (1–20 MHz), sub-clock (32.768 kHz), and internal RC oscillators (1 MHz, 125 kHz).

Peripheral integration includes three 16-bit timer/counters with capture/compare and PWM output, one watchdog timer with independent clock source, and a 10-bit successive-approximation ADC with built-in sample-and-hold and selectable reference (AVREF or VDD). All peripherals are memory-mapped and controlled via dedicated SFRs with interrupt capability.

Key Specifications

Pinout & Package

UPD78F0566MC-CAA-AX is housed in a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are fully defined per Renesas Hardware User's Manual Rev.4.00 (Section 1.3.2 and 2.1.2).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100LEAFB#30 and STM8L152R8T6, the UPD78F0566MC-CAA-AX offers higher Flash density and native 8×8 multiply/divide - making it optimal for legacy 78K0 codebases and applications demanding deterministic 20-MHz real-time control without voltage scaling constraints.

Availability

UPD78F0566MC-CAA-AX is available at Aetrix Electronics and suitable for industrial HMI panels, smart sensor nodes, and PLC I/O modules requiring stable component supply across multi-year production cycles.

Supply support for UPD78F0566MC-CAA-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/KA2-L product line delivers cost-optimized, high-reliability 8-bit MCUs targeting industrial automation, building controls, and legacy-system upgrades - emphasizing Flash endurance, wide supply range, and long-term availability.

FAQ

What is the maximum operating frequency of the UPD78F0566MC-CAA-AX?

The UPD78F0566MC-CAA-AX supports a maximum CPU clock frequency of 20 MHz when driven by the external X1 oscillator. This corresponds to 20 million instructions per second (MIPS) under typical conditions. The device also supports internal RC oscillators at 1 MHz and 125 kHz for low-power operation, and a 32.768 kHz sub-clock for RTC functionality. All clock sources are configurable via the system clock control registers (CKC).

Does the UPD78F0566MC-CAA-AX include on-chip debug capability?

Yes, the UPD78F0566MC-CAA-AX supports on-chip debugging via the single-wire debug interface compatible with Renesas QB-MINI2 and E2 emulator tools. Debug features include breakpoint setting, step execution, register and memory inspection, and real-time variable monitoring. The debug interface shares pins with the UART0 channel (P00/P01), requiring configuration management during development versus production use.

What ADC performance specifications apply to the UPD78F0566MC-CAA-AX?

UPD78F0566MC-CAA-AX integrates a 10-bit successive-approximation ADC with 8 input channels (AD0–AD7). It achieves a maximum sampling rate of 100 kSPS, integral nonlinearity (INL) of ±1 LSB, and supports both AVREF and VDD as reference voltage sources. Conversion time is fixed at 12 µs per sample, and the ADC includes built-in sample-and-hold circuitry for accurate acquisition of fast-changing analog signals.

Is the UPD78F0566MC-CAA-AX RoHS compliant and halogen-free?

Yes, the UPD78F0566MC-CAA-AX meets EU RoHS Directive 2011/65/EU requirements and is manufactured as a halogen-free product per Renesas standard JESD204B. The LQFP-64 package uses lead-free matte tin plating, and material declarations confirm compliance with REACH SVHC thresholds. Full compliance documentation is available through Renesas' Quality & Reliability portal using the part's traceable lot code.

How many timer/counters does the UPD78F0566MC-CAA-AX provide, and what are their capabilities?

The UPD78F0566MC-CAA-AX includes three independent 16-bit timer/counters (Timer RJ, Timer RK, Timer RL). Each supports input capture, output compare, PWM generation (including complementary mode), and interval timing. Timer RJ and RK can operate in slave mode synchronized to external events, while Timer RL supports asynchronous operation using the sub-clock. All timers generate interrupts and support prescaler division ratios from 1 to 128.