Renesas UPD78F0561MC-CAA-AX

Overview

UPD78F0561MC-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 2.7–5.5 V supply. Used in industrial control panels requiring deterministic real-time response and low-power operation.

For engineers reviewing the UPD78F0561MC-CAA-AX datasheet, UPD78F0561MC-CAA-AX pinout, UPD78F0561MC-CAA-AX application, or UPD78F0561MC-CAA-AX equivalent, key selection criteria include Flash endurance (100k write/erase cycles), built-in voltage regulator (V_REG output), watchdog timer with independent clock source, and support for in-circuit debugging via on-chip debug interface.

Technical Context

The UPD78F0561MC-CAA-AX implements the 78K0S core with 16-bit address space, 8-bit data bus, and Harvard architecture. It supports three power-saving modes: HALT, STOP, and IDLE - each with configurable wake-up sources including external interrupts, timer overflows, and serial receive events.

Its clock system includes internal high-speed oscillator (HSO) at 15.625 MHz, selectable X1 crystal input (1–20 MHz), and sub-clock oscillator (32.768 kHz) for RTC. All peripherals are synchronized to the main system clock, with independent prescalers enabling flexible timing configurations for ADC sampling, PWM generation, and serial baud rate derivation.

Key Specifications

Pinout & Package

UPD78F0561MC-CAA-AX is housed in a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions follow JEDEC MS-026 standard layout and support 3.3 V or 5 V I/O level compatibility depending on V_CC setting.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F0561MC-CAA-AX, R5F100LEAFB#30 offers superior low-power metrics but requires external regulation for analog circuits, while UPD78F0533GC-8EU-A provides pin-compatible footprint reduction at the expense of Flash size and peripheral count - both serve distinct trade-off points in resource-constrained embedded systems.

Availability

UPD78F0561MC-CAA-AX is available at Aetrix Electronics and suitable for industrial automation, building management systems, and medical device monitoring requiring stable component supply across multi-year production cycles.

Supply support for UPD78F0561MC-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, and power devices, with global design centers and manufacturing partnerships.

The 78K0/Kx2-L product line delivers cost-optimized 8-bit MCUs for industrial and consumer applications demanding robustness, long-term availability, and mature development tool support - targeting designs with 5–15 year lifecycle requirements.

FAQ

What is the maximum operating frequency of the UPD78F0561MC-CAA-AX?

The UPD78F0561MC-CAA-AX supports a maximum CPU clock frequency of 20 MHz. This can be achieved using either the internal high-speed oscillator (HSO) running at 15.625 MHz with PLL multiplication or an external crystal up to 20 MHz connected to the X1 pin. The actual achievable frequency depends on supply voltage and ambient temperature per the electrical characteristics table in the hardware manual.

Does the UPD78F0561MC-CAA-AX include an on-chip voltage regulator?

Yes, the UPD78F0561MC-CAA-AX integrates an on-chip voltage regulator (V_REG) that outputs a stable 3.3 V ±5% supply for internal logic. This regulator is enabled by default and eliminates the need for an external LDO in many applications. Its output is accessible on the REGC pin and must be decoupled with a 1 µF ceramic capacitor to ensure stability under dynamic load conditions.

How many analog-to-digital converter channels does the UPD78F0561MC-CAA-AX support?

The UPD78F0561MC-CAA-AX features an 8-channel, 10-bit successive approximation ADC. Channels AD0 through AD7 map to dedicated pins P10–P13 and P20–P23. Each channel supports hardware-triggered conversion via timer overflow or external event, and the ADC includes automatic offset/gain calibration routines accessible via the built-in self-test library.

Is the UPD78F0561MC-CAA-AX pin-compatible with other members of the 78K0/KA2-L family?

Yes, the UPD78F0561MC-CAA-AX shares the same 64-pin LQFP package and pin assignment with other 78K0/KA2-L devices such as UPD78F0560 and UPD78F0562. However, functional differences exist - for example, UPD78F0560 has only 48 KB Flash and no V_REG output, while UPD78F0562 adds CAN interface. Pin compatibility enables PCB reuse but firmware and peripheral initialization must match the specific variant.

What debug interface does the UPD78F0561MC-CAA-AX support?

The UPD78F0561MC-CAA-AX supports Renesas' on-chip debug interface using a single-wire physical layer compatible with the QB-MINI2 emulator and RA78K0 toolchain. This interface provides full read/write access to memory and registers, hardware breakpoints, and flash programming without requiring additional pins beyond RESET and CLKOUT - enabling debugging in space-constrained layouts where JTAG is impractical.