Renesas UPD78F1174AGF-GAT-AX

Overview

UPD78F1174AGF-GAT-AX from Renesas Electronics is a 16-bit single-chip microcontroller in the 78K0R/KE3 family, featuring 128 KB on-chip Flash memory, 8 KB RAM, and integrated peripherals including 10-bit ADC (16 channels), UART, I²C, and 16-bit timer arrays. It operates at up to 20 MHz with supply voltage range of 2.7–5.5 V and targets embedded control in industrial sensors and motor-driven appliances.

For engineers reviewing the UPD78F1174AGF-GAT-AX datasheet, UPD78F1174AGF-GAT-AX pinout, UPD78F1174AGF-GAT-AX application, or UPD78F1174AGF-GAT-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 - all critical for cost-sensitive, long-lifecycle industrial firmware deployments.

Technical Context

The UPD78F1174AGF-GAT-AX implements the 78K0R CPU core with Harvard architecture, supporting 16-bit data paths and 24-bit addressing. It integrates a programmable low-voltage detector (LVD) with 4 selectable thresholds (2.7 V, 3.0 V, 3.3 V, 4.0 V) and a 16-bit watchdog timer with independent clock source.

Peripherals include a 16-channel 10-bit ADC with conversion time as low as 1.2 μs, dual UARTs with LIN support, and a 32-bit real-time counter (RTC) with calendar function. All I/O ports are individually configurable for pull-up, open-drain, or CMOS output modes with Schmitt-trigger input capability.

Key Specifications

Pinout & Package

The UPD78F1174AGF-GAT-AX is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad for enhanced heat dissipation in high-duty-cycle applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100LGSP and UPD78F1154AGF-GAT-AX, the UPD78F1174AGF-GAT-AX delivers higher Flash capacity for complex control algorithms and integrated RTC functionality that eliminates external timekeeping components - making it optimal for applications requiring firmware extensibility and time-aware operations.

Availability

UPD78F1174AGF-GAT-AX is available at Aetrix Electronics and suitable for industrial sensor nodes, motor control interfaces, and smart appliance UIs requiring stable component supply across multi-year production cycles.

Supply support for UPD78F1174AGF-GAT-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/KE3 product line was designed for cost-effective, high-reliability embedded control in industrial equipment and consumer appliances - emphasizing Flash endurance, mixed-signal integration, and robust debug capabilities.

FAQ

What is the maximum operating frequency of the UPD78F1174AGF-GAT-AX?

The UPD78F1174AGF-GAT-AX operates at a maximum system clock frequency of 20 MHz when powered at 2.7–5.5 V. This frequency is achieved using the on-chip high-speed oscillator (HOCO) or an external crystal up to 20 MHz. The CPU executes instructions at 1.25 DMIPS/MHz, delivering 25 DMIPS peak performance. Frequency scaling is supported via prescalers in the clock control unit to reduce power in non-critical tasks.

Does the UPD78F1174AGF-GAT-AX support in-system programming via UART?

Yes, the UPD78F1174AGF-GAT-AX supports in-system programming (ISP) via UART using the built-in bootloader. The bootloader occupies fixed 4 KB of Flash and is activated by holding FLMD0 high and asserting RESET while powering up. It accepts Intel HEX files and supports checksum verification, erase-before-write, and secure boot options. No external programmer is needed for field firmware updates.

What is the ADC resolution and channel count of the UPD78F1174AGF-GAT-AX?

The UPD78F1174AGF-GAT-AX features a 10-bit successive approximation ADC with 16 input channels. Conversion time is as fast as 1.2 μs per sample under optimal conditions (VDD ≥ 4.5 V, ADC clock = 16 MHz). The ADC supports hardware-triggered auto-scan across selected channels, internal reference (2.5 V bandgap), and external reference (2.0–5.5 V), enabling flexible sensor interfacing without external signal conditioning.

Is the UPD78F1174AGF-GAT-AX pin-compatible with other 78K0R/KE3 devices?

The UPD78F1174AGF-GAT-AX is pin-compatible with other 100-pin LQFP variants in the 78K0R/KE3 family, including UPD78F1154AGF-GAT-AX and UPD78F1164AGF-GAT-AX. All share identical pin functions, electrical characteristics, and mechanical footprint. Differences are limited to Flash size (96 KB, 128 KB, 192 KB) and minor peripheral enablement - allowing shared PCB designs across product tiers.

What debug interface does the UPD78F1174AGF-GAT-AX use?

The UPD78F1174AGF-GAT-AX uses a single-wire on-chip debug (SWD) interface compliant with Renesas' standard debug protocol. It requires only one dedicated pin (besides VDD and VSS) and supports full JTAG-equivalent functionality - including breakpoints, watchpoints, register read/write, and memory access - without occupying additional GPIO. Debug is enabled by default and can be disabled via Flash option byte for production security.