Renesas UPD78F1166AGC(S)-UEU-AX

Overview

UPD78F1166AGC(S)-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 10-bit ADC (16 channels), UART, I²C, and timer modules. It operates at up to 20 MHz with supply voltage range 2.7–5.5 V and targets embedded control in industrial HMI, motor drive interfaces, and sensor-based automation systems.

For engineers reviewing the UPD78F1166AGC(S)-UEU-AX datasheet, UPD78F1166AGC(S)-UEU-AX pinout, UPD78F1166AGC(S)-UEU-AX application, or UPD78F1166AGC(S)-UEU-AX equivalent, key selection criteria include Flash endurance (100k write/erase cycles), operating temperature range (−40°C to +85°C), and compatibility with RA78K0R toolchain and QB-MINI2 debug emulator.

Technical Context

The UPD78F1166AGC(S)-UEU-AX implements the 78K0R CPU core with 16-bit architecture, supporting 16-bit data paths and 20-bit addressing. It integrates a 10-bit successive-approximation ADC with sample-and-hold and programmable conversion timing, plus dual UARTs with automatic baud-rate detection and I²C interface compliant with standard-mode (100 kbps) and fast-mode (400 kbps) specifications.

Its peripheral set includes three 16-bit timer arrays (each with capture/compare, PWM, and interval timer functions), a watchdog timer with independent clock source, and on-chip voltage regulator (REGC pin) for internal logic stabilization. The device uses SuperFlash® technology licensed from Silicon Storage Technology for reliable Flash programming and data retention over 20 years.

Key Specifications

Pinout & Package

UPD78F1166AGC(S)-UEU-AX is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignment follows the 78K0R/KG3 standard layout, supporting multiplexed I/O, analog inputs, power domains (EVDD0/EVSS0 for analog, VDD/VSS for digital), and dedicated debug interface pins (RES, FLMD0).

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F1166AGC(S)-UEU-AX, R5F100PLAFB#30 offers lower system cost at reduced peripheral integration, while MB95560PFT-G-SNE1 delivers higher CPU throughput but increases analog design complexity due to missing REGC functionality.

Availability

UPD78F1166AGC(S)-UEU-AX is available at Aetrix Electronics and suitable for industrial HMI, motor control, sensor gateway, and programmable relay applications requiring stable component supply across multi-year production cycles.

Supply support for UPD78F1166AGC(S)-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 industrial, automotive, and infrastructure markets.

The 78K0R/KG3 product line was designed for cost-sensitive, high-reliability industrial embedded control - emphasizing Flash endurance, wide operating voltage, and integrated analog/motor control peripherals without external support components.

FAQ

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

The UPD78F1166AGC(S)-UEU-AX supports a maximum system clock frequency of 20 MHz. This frequency is derived from an internal high-speed oscillator or external crystal input, and it governs instruction execution speed, peripheral timing, and ADC conversion rate. At 20 MHz, the UPD78F1166AGC(S)-UEU-AX achieves approximately 10 MIPS performance, sufficient for real-time motor control and sensor fusion tasks without requiring external acceleration.

Does the UPD78F1166AGC(S)-UEU-AX include an integrated voltage regulator?

Yes, the UPD78F1166AGC(S)-UEU-AX includes an on-chip voltage regulator controlled via the REGC pin. When a 1 µF ceramic capacitor is connected between REGC and EVSS0, the regulator stabilizes the internal analog and peripheral power domain at ~3.3 V. This eliminates the need for an external LDO in many industrial designs and improves noise immunity for the 10-bit ADC and comparator circuits within the UPD78F1166AGC(S)-UEU-AX.

How many ADC channels does the UPD78F1166AGC(S)-UEU-AX support, and what is its resolution?

The UPD78F1166AGC(S)-UEU-AX integrates a 10-bit successive-approximation ADC with 16 selectable input channels. These channels can be configured for single-ended or differential measurements, and the ADC supports programmable sampling time and trigger sources (software, timer, or external event). Its typical integral nonlinearity is ±2 LSB, making it suitable for precision analog sensing in industrial temperature, pressure, and current monitoring applications using the UPD78F1166AGC(S)-UEU-AX.

Is the UPD78F1166AGC(S)-UEU-AX pin-compatible with other members of the 78K0R/KG3 family?

The UPD78F1166AGC(S)-UEU-AX shares the same 100-pin LQFP package and core pinout as other 78K0R/KG3 devices in the same pin-count variant (e.g., UPD78F1165AGC(S)-UEU-AX and UPD78F1167AGC(S)-UEU-AX), but functional pin assignments differ based on Flash size and peripheral enablement. While mechanical mounting is identical, software and schematic validation is required when substituting - especially for ADC channel mapping, UART routing, and timer array availability. The UPD78F1166AGC(S)-UEU-AX is not a drop-in replacement for lower-pin-count variants.

What development tools are officially supported for the UPD78F1166AGC(S)-UEU-AX?

Renesas officially supports the RA78K0R assembler and CC78K0R C compiler for firmware development targeting the UPD78F1166AGC(S)-UEU-AX. Debugging is enabled via the QB-MINI2 on-chip debug emulator, which connects through the RES and FLMD0 pins. Flash programming uses PG-FP4 or PG-FP5 programmers with appropriate 78K0R adapter. All tools are documented in Renesas User's Manual U17894EJ9V0UD and require no third-party license for basic UPD78F1166AGC(S)-UEU-AX development.