Renesas UPD78F1166AGC(A)-UEU-AX

Overview

UPD78F1166AGC(A)-UEU-AX from Renesas Electronics is a 16-bit single-chip microcontroller in the 78K0R/KG3 family, featuring 128 KB on-chip Flash memory, 8 KB RAM, and integrated peripherals including 12-bit ADC, UART, I²C, and timer modules. It operates at up to 20 MHz with supply voltage range of 2.7–5.5 V and targets embedded control in industrial and consumer equipment.

For engineers reviewing the UPD78F1166AGC(A)-UEU-AX datasheet, UPD78F1166AGC(A)-UEU-AX pinout, UPD78F1166AGC(A)-UEU-AX application, or UPD78F1166AGC(A)-UEU-AX equivalent, key selection criteria include Flash endurance (100,000 write/erase cycles), operating temperature range (−40°C to +85°C), and support for on-chip debug via single-wire interface.

Technical Context

The UPD78F1166AGC(A)-UEU-AX implements the 78K0R CPU core with 16-bit architecture, Harvard memory structure, and instruction set compatible with earlier 78K0 devices. It integrates a 12-bit successive-approximation ADC with 16 input channels and programmable sampling time.

Peripheral subsystems include three 16-bit timer arrays (TAU) with capture/compare, two serial interfaces (UART and I²C), and a watchdog timer with independent clock source. The device supports low-power modes including HALT and STOP, with wake-up capability via external interrupt or peripheral event.

Key Specifications

Pinout & Package

UPD78F1166AGC(A)-UEU-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 User's Manual U17894EJ9V0UD, Chapter 2.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with R5F100PLAFB#30 and MB95560PFR-G-SPE1, the UPD78F1166AGC(A)-UEU-AX offers superior ADC linearity and integrated voltage regulation, making it preferred for cost-sensitive industrial sensors where analog accuracy and supply simplicity are critical.

Availability

UPD78F1166AGC(A)-UEU-AX is available at Aetrix Electronics and suitable for industrial motor control, smart home sensor hubs, and factory floor HMI panels requiring stable component supply across multi-year production cycles.

Supply support for UPD78F1166AGC(A)-UEU-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 leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The 78K0R/KG3 product line delivers cost-optimized 16-bit MCUs targeting resource-constrained embedded applications requiring robust analog integration and long-term supply stability.

FAQ

What is the maximum operating frequency of the UPD78F1166AGC(A)-UEU-AX?

The UPD78F1166AGC(A)-UEU-AX supports a maximum system clock frequency of 20 MHz, derived from an external crystal oscillator or internal high-speed RC oscillator. This allows instruction execution at 50 ns per cycle for time-critical control tasks. The UPD78F1166AGC(A)-UEU-AX maintains full specification compliance-including ADC accuracy and timing margins-across its entire −40°C to +85°C industrial temperature range at this speed.

Does the UPD78F1166AGC(A)-UEU-AX support in-system programming (ISP)?

Yes, the UPD78F1166AGC(A)-UEU-AX supports in-system programming via its on-chip serial interface using the Renesas PG-FP4 or PG-FP5 programmers. Firmware updates can be performed without removing the device from the target board, leveraging the built-in bootloader and Flash memory's 100,000-cycle endurance. The UPD78F1166AGC(A)-UEU-AX requires no external high-voltage supply for programming, simplifying field upgrade infrastructure.

What debug interface does the UPD78F1166AGC(A)-UEU-AX use?

The UPD78F1166AGC(A)-UEU-AX implements a single-wire debug (SWD) interface compliant with Renesas' standard debug protocol, enabling full breakpoint, register read/write, and memory inspection capabilities. Unlike JTAG, SWD uses only one dedicated pin (besides ground), conserving PCB real estate. The UPD78F1166AGC(A)-UEU-AX debug interface is supported by RA78K0R and ID78K0R-QB tools without requiring additional level-shifting circuitry.

Is the UPD78F1166AGC(A)-UEU-AX qualified for automotive applications?

No, the UPD78F1166AGC(A)-UEU-AX is rated for Standard quality grade per Renesas documentation, intended for industrial, consumer, and office equipment-not automotive or safety-critical systems. It lacks AEC-Q100 qualification, extended temperature screening, and fault-tolerant features required for automotive ECUs. For automotive use, Renesas recommends the RL78/F1x or RH850 families instead of the UPD78F1166AGC(A)-UEU-AX.

How many ADC channels does the UPD78F1166AGC(A)-UEU-AX support?

The UPD78F1166AGC(A)-UEU-AX integrates a 12-bit successive-approximation ADC with 16 selectable input channels (AN0–AN15), accessible through ports P40–P47, P50–P57, and P140–P145. Each channel supports programmable sampling time and multiple trigger sources including software, timer overflows, and external pins. The UPD78F1166AGC(A)-UEU-AX ADC achieves ±1 LSB integral nonlinearity across its full operating range.