Renesas UPD78F1843GCA-UEU-G

Overview

UPD78F1843GCA-UEU-G from Renesas Electronics is a 16-bit single-chip microcontroller in the 78K0R/Fx3 family, featuring 256 KB Flash memory, 24 KB RAM, and integrated peripherals including 12-bit ADC, UART, I²C, and LIN-capable timer array unit. It operates at up to 20 MHz and supports industrial temperature range (−40°C to +85°C), targeting embedded control in motor drives and sensor-based systems.

For engineers reviewing the UPD78F1843GCA-UEU-G datasheet, UPD78F1843GCA-UEU-G pinout, UPD78F1843GCA-UEU-G application, or UPD78F1843GCA-UEU-G equivalent, key selection criteria include Flash endurance (100,000 write/erase cycles), on-chip debug support via on-chip debugging emulator (QB-MINI2), and compliance with industrial-grade reliability standards per Renesas' standard quality level.

Technical Context

The UPD78F1843GCA-UEU-G implements the 78K0R CPU core with Harvard architecture, supporting 16-bit data paths and 24-bit addressing. It integrates dual voltage domains (EVDD/EVSS for analog peripherals, VDD/VSS for digital logic) and features a programmable PLL for flexible clock generation from external crystal (1–20 MHz) or internal oscillators.

Its timer array unit includes LIN-bus timing support on channels 2 and 3, enabling direct implementation of LIN 2.0/2.1 slave node timing without external components. The device uses SuperFlash® technology for nonvolatile memory, ensuring fast erase/write and high data retention (>20 years at 85°C).

Key Specifications

Pinout & Package

UPD78F1843GCA-UEU-G is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined across 16 I/O ports (P0–P15), analog reference (AVREF), reset (RESET), clock inputs (X1, X2), and dual power domains (VDD/EVDD, VSS/EVSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F1843GCA-UEU-G, R5F10PLGCLFB#30 offers higher MIPS/mW efficiency but requires firmware porting and loses LIN timing hardware; UPD78F1842GCA-UEU-G provides identical functionality at lower Flash capacity, enabling immediate cost reduction without design revision.

Availability

UPD78F1843GCA-UEU-G is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and sensor fusion systems requiring stable component supply, long-term lifecycle support, and industrial temperature operation.

Supply support for UPD78F1843GCA-UEU-G 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 manufacturer headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The 78K0R/Fx3 product line was designed for cost-sensitive, high-reliability embedded control applications requiring robust analog integration, deterministic real-time performance, and long-lifecycle support in industrial environments.

FAQ

What is the maximum operating frequency of the UPD78F1843GCA-UEU-G?

The UPD78F1843GCA-UEU-G supports a maximum system clock frequency of 20 MHz. This is achieved using the on-chip PLL to multiply an external crystal input (1–20 MHz) or internal oscillator output. The CPU executes instructions at this system clock rate, with most instructions completing in one or two cycles. The 20 MHz limit ensures timing compliance across all integrated peripherals including the 12-bit ADC and LIN-capable timer array unit.

Does the UPD78F1843GCA-UEU-G support LIN bus communication natively?

Yes, the UPD78F1843GCA-UEU-G supports LIN bus communication through dedicated hardware in its Timer Array Unit. Specifically, channels 2 and 3 are LIN-timing capable, providing automatic synchronization, header detection, and checksum calculation per LIN 2.0/2.1 specifications. This eliminates the need for bit-banging or external timing components, enabling certified LIN slave node implementation directly from the UPD78F1843GCA-UEU-G.

What debug tools are compatible with the UPD78F1843GCA-UEU-G?

The UPD78F1843GCA-UEU-G is fully supported by Renesas' QB-MINI2 on-chip debugging emulator, which connects via the single-wire debug interface (SWD). It also works with ID78K0R-QB Ver.3.20 integrated debugger and PM+ Ver.6.30 development environment. These tools provide real-time trace, register inspection, and flash programming without requiring additional ICE headers or board modifications - all verified for use with the UPD78F1843GCA-UEU-G.

What is the Flash memory endurance specification for the UPD78F1843GCA-UEU-G?

The UPD78F1843GCA-UEU-G features 256 KB of on-chip SuperFlash® memory rated for 100,000 write/erase cycles per sector and data retention exceeding 20 years at +85°C. This endurance is validated per Renesas' internal qualification standards and applies to all Flash sectors used for program storage or EEPROM emulation. The UPD78F1843GCA-UEU-G supports in-system programming via its built-in bootloader (Type02 library), enabling field firmware updates without removing the device.

Is the UPD78F1843GCA-UEU-G qualified for industrial temperature operation?

Yes, the UPD78F1843GCA-UEU-G is qualified for industrial temperature operation from −40°C to +85°C ambient. It belongs to Renesas' standard quality level, intended for applications such as industrial automation, HVAC controls, and sensor nodes. The device undergoes full electrical testing across this range, including Flash read/write, ADC linearity, and I/O drive strength. Thermal design guidance - including REGC capacitor requirements and PCB copper pour recommendations - is documented specifically for the UPD78F1843GCA-UEU-G.