Renesas UPD78F1144AGB-GAH-AX

Overview

UPD78F1144AGB-GAH-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 2.7–5.5 V and targets embedded control in industrial HMI, motor drive interfaces, and sensor-based automation systems.

For engineers reviewing the UPD78F1144AGB-GAH-AX datasheet, UPD78F1144AGB-GAH-AX pinout, UPD78F1144AGB-GAH-AX application, or UPD78F1144AGB-GAH-AX equivalent, key selection considerations include its 100-pin LQFP package, 10-bit ADC resolution with sample-and-hold, dual UART support with LIN capability, and ROM-less boot option via FLMD0 configuration.

Technical Context

The UPD78F1144AGB-GAH-AX implements the 78K0R CPU core with 16-bit architecture, Harvard memory organization, and instruction set compatible with earlier 78K0 devices. It supports real-time interrupt handling with 22 vector sources, priority-controlled nested interrupts, and low-power modes including HALT and STOP with wake-up via external interrupt or peripheral event.

On-chip peripherals include a 16-bit multifunction timer array (TAU) with PWM output, watchdog timer (WDT) with independent clock source, and power-on reset (POR) with built-in voltage detector (VDD = 2.7 V threshold). The device uses SuperFlash® technology for Flash endurance (100,000 write/erase cycles) and data retention (>20 years at 85°C).

Key Specifications

Pinout & Package

The UPD78F1144AGB-GAH-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 U17854EJ9V0UD, Section 2.1–2.2, and include dedicated analog inputs (AN0–AN15), serial interface pins (TXD0/RXD0, TXD1/RXD1, SCL/SDA), and programmable I/O ports P0–P7, P12–P14.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100LEAFB#30 and MB95560PFT-G-SAMPLE, the UPD78F1144AGB-GAH-AX offers superior analog integration (16-channel ADC with hardware scan) and LIN-ready UART in a mature, production-proven 16-bit architecture - ideal for cost-sensitive industrial control where peripheral richness outweighs raw MIPS.

Availability

UPD78F1144AGB-GAH-AX is available at Aetrix Electronics and suitable for industrial motor control interfaces, smart sensor nodes, human-machine interface panels, and programmable logic controller I/O modules requiring stable component supply and long-term lifecycle support.

Supply support for UPD78F1144AGB-GAH-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 UPD78F1144AGB-GAH-AX belongs to the 78K0R/KE3 product line, designed specifically for cost-optimized, high-reliability embedded control in industrial automation, building systems, and appliance applications where deterministic real-time response and analog integration are critical.

FAQ

What is the maximum operating frequency of the UPD78F1144AGB-GAH-AX?

The UPD78F1144AGB-GAH-AX supports a maximum CPU operating frequency of 20 MHz using its on-chip PLL, with base clock options including external crystal (1–20 MHz), ceramic resonator, or internal high-speed oscillator. At 20 MHz, the instruction cycle time is 50 ns, enabling sub-microsecond interrupt latency for time-critical control loops. The UPD78F1144AGB-GAH-AX maintains full peripheral functionality across this range without derating.

Does the UPD78F1144AGB-GAH-AX support in-system programming (ISP)?

Yes, the UPD78F1144AGB-GAH-AX supports in-system programming via its on-chip bootloader, accessible through UART0 using the Renesas Flash Development Toolkit (FDT). Firmware updates can be performed without removing the UPD78F1144AGB-GAH-AX from the target board, provided FLMD0 is held high during reset to enter ROM mode. The bootloader occupies fixed 4 KB of Flash space and validates checksums before committing new code.

What ADC features does the UPD78F1144AGB-GAH-AX provide beyond basic 10-bit resolution?

Beyond 10-bit resolution, the UPD78F1144AGB-GAH-AX ADC includes hardware-triggered scan mode across all 16 channels, sample-and-hold circuitry for simultaneous sampling, selectable reference voltage (internal AVREF or external), and automatic channel sequencing without CPU intervention. These features allow the UPD78F1144AGB-GAH-AX to acquire synchronized multi-sensor data - such as motor phase currents and temperature - within a single conversion window, improving control loop accuracy.

Is the UPD78F1144AGB-GAH-AX qualified for automotive applications?

No, the UPD78F1144AGB-GAH-AX is rated for industrial temperature range (−40°C to +85°C) and classified as "Standard" quality grade per Renesas documentation, intended for computers, office equipment, industrial robots, and home appliances. It is not AEC-Q100 qualified and lacks automotive-specific features like extended temperature range (−40°C to +125°C), enhanced ESD immunity, or fault-tolerant CAN/LIN transceivers required for automotive use.

How does the UPD78F1144AGB-GAH-AX handle power failure during Flash write operations?

The UPD78F1144AGB-GAH-AX incorporates a built-in voltage detector (VDD monitor) that halts Flash write/erase operations if supply voltage drops below 2.7 V, preventing corruption. During active programming, the UPD78F1144AGB-GAH-AX disables interrupts and asserts BUSY flag until completion. Combined with SuperFlash®'s inherent block-wise erase architecture, this ensures that partial writes do not invalidate adjacent sectors - preserving firmware integrity even during unexpected power loss.