Renesas UPD78F1168GC-UEU-AX

Overview

UPD78F1168GC-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 (8 channels), UART, I²C, and 16-bit timer arrays. It operates at up to 20 MHz and supports industrial temperature range (−40°C to +85°C) in a 100-pin LQFP package. It is used in motor control subsystems for HVAC blowers and industrial pump drives.

For engineers reviewing the UPD78F1168GC-UEU-AX datasheet, UPD78F1168GC-UEU-AX pinout, UPD78F1168GC-UEU-AX application, or UPD78F1168GC-UEU-AX equivalent, this page delivers verified functional identity, confirmed package mapping (LQFP-100), validated pin roles, real-world use context, and two technically documented alternative parts with explicit differences.

Technical Context

The UPD78F1168GC-UEU-AX implements the 78K0R CPU core with 16-bit architecture, Harvard memory organization, and instruction set compatible with earlier 78K0 series. It integrates a 12-bit successive-approximation ADC with sample-and-hold and programmable conversion timing, plus dual UART modules supporting asynchronous full-duplex communication with selectable baud rates.

Its peripheral set includes three 16-bit timer arrays (each with input capture, output compare, PWM generation, and dead-time insertion), an I²C bus interface compliant with SMBus v2.0, and a watchdog timer with independent clock source. The device uses on-chip voltage regulator (REGC pin) to supply internal logic at 3.3 V from a 5 V external supply.

Key Specifications

Pinout & Package

UPD78F1168GC-UEU-AX is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package 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 UPD78F1168GC-UEU-AX, R5F100PLGFB#50 offers lower cost and newer RL78 architecture but lacks hardware dead-time control critical for motor gate drivers, while UPD78F1158GC-UEU-AX provides identical peripheral functionality with reduced memory-enabling direct substitution where Flash headroom is not required.

Availability

UPD78F1168GC-UEU-AX is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, and factory automation I/O modules requiring stable component supply across multi-year production cycles.

Supply support for UPD78F1168GC-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 formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions.

The UPD78F1168GC-UEU-AX belongs to the 78K0R/KG3 product line, designed specifically for cost-sensitive industrial control applications demanding robust analog integration, deterministic real-time response, and long-term supply stability.

FAQ

What is the maximum operating frequency of the UPD78F1168GC-UEU-AX?

The UPD78F1168GC-UEU-AX operates at a maximum CPU clock frequency of 20 MHz when supplied with EVDD0/EVDD1 at 4.0–5.5 V. This frequency is derived from the on-chip high-speed oscillator (HOCO) or an external crystal (1–20 MHz) via PLL multiplication. The 78K0R core executes most instructions in 1–2 clock cycles, delivering up to 20 MIPS throughput. Frequency scaling beyond 20 MHz is not supported and may cause timing violations or undefined behavior in the UPD78F1168GC-UEU-AX.

Does the UPD78F1168GC-UEU-AX support in-system programming (ISP)?

Yes, the UPD78F1168GC-UEU-AX supports in-system programming via its built-in bootloader, which resides in ROM and is activated using the FLMD0 pin configuration at reset. Programming is performed over UART using Renesas' Flash Development Toolkit (FDT) or custom host firmware. No external programmer is required for field updates, though the UPD78F1168GC-UEU-AX does require a valid reset sequence and correct baud rate negotiation to enter bootloader mode.

What is the function of the REGC pin on the UPD78F1168GC-UEU-AX?

The REGC pin on the UPD78F1168GC-UEU-AX is the output of the on-chip voltage regulator, providing a stable 3.3 V supply to internal logic circuits. It must be decoupled with a minimum 10 µF ceramic capacitor connected between REGC and EVSS0. This eliminates the need for an external 3.3 V LDO in designs powered from 5 V, reducing BOM count and PCB area. The UPD78F1168GC-UEU-AX will not operate correctly if REGC is left floating or improperly bypassed.

How many ADC input channels does the UPD78F1168GC-UEU-AX have, and what is their resolution?

The UPD78F1168GC-UEU-AX integrates a single 12-bit successive-approximation ADC with 8 configurable input channels (CH0–CH7). Conversion time is 1.2 µs per sample at maximum clock rate, supporting up to 1.25 MSPS aggregate throughput. Input channels map to specific port pins (e.g., P10–P13, P20–P23), and the ADC supports both internal and external reference configurations via AVREF0/AVREF1 pins. This ADC capability is fully documented in the UPD78F1168GC-UEU-AX User's Manual U17894EJ9V0UD.

Is the UPD78F1168GC-UEU-AX pin-compatible with other members of the 78K0R/KG3 family?

The UPD78F1168GC-UEU-AX shares the same 100-pin LQFP package and pin assignment with other 78K0R/KG3 devices in the μPD78F116x series, including UPD78F1162 through UPD78F1167 and their 'A' variants. However, peripheral enablement and memory size differ across models - for example, UPD78F1162GC-UEU-AX has only 64 KB Flash and no TAU2 timer. Pin compatibility does not guarantee functional equivalence; register-level initialization and firmware must be validated per part number, especially for UPD78F1168GC-UEU-AX-specific features like full 128 KB Flash access.