Renesas UPD78F1144AGK-GAJ-AX

Overview

UPD78F1144AGK-GAJ-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 timer modules. 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 UPD78F1144AGK-GAJ-AX datasheet, UPD78F1144AGK-GAJ-AX pinout, UPD78F1144AGK-GAJ-AX application, or UPD78F1144AGK-GAJ-AX equivalent, key selection criteria include Flash endurance (100,000 write/erase cycles), operating temperature range (−40°C to +85°C), and QFP-100 package compatibility with legacy 78K0R designs.

Technical Context

The UPD78F1144AGK-GAJ-AX implements the 78K0R CPU core with 16-bit architecture, supporting 111 instructions and 16-bit data paths. It integrates a 10-bit successive-approximation ADC with sample-and-hold and programmable conversion start triggers via timer or external signal.

Peripheral configuration includes three 16-bit timer arrays (TAU) with PWM output capability, one serial interface (UART) with LIN support, and one I²C-compatible interface operating in master/slave mode with 7-bit addressing. The device uses on-chip voltage regulator (REGC pin) for internal logic supply stabilization.

Key Specifications

Pinout & Package

This device is housed in a 100-pin LQFP (Low-Profile Quad Flat Package) with 0.5 mm pitch, JEDEC MS-026 compliant, and thermal pad exposed on underside for enhanced heat dissipation in continuous operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F1144AGK-GAJ-AX, R5F100PLAFB#30 offers modern debug infrastructure but fewer analog resources, while UPD78F1142AGK-GAJ-AX provides guaranteed pin compatibility with reduced memory - enabling incremental design reuse without layout changes.

Availability

UPD78F1144AGK-GAJ-AX is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance control, and motor drive interface modules requiring stable component supply across extended production lifecycles.

Supply support for UPD78F1144AGK-GAJ-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 devices for industrial and automotive markets.

The 78K0R/KE3 product line delivers cost-optimized 16-bit MCUs targeting industrial automation, home appliances, and sensor systems where Flash density, analog integration, and long-term supply stability are critical.

FAQ

What is the maximum operating frequency supported by the UPD78F1144AGK-GAJ-AX?

The UPD78F1144AGK-GAJ-AX supports a maximum system clock frequency of 20 MHz. This can be achieved using either the internal high-speed oscillator (HOCO) or an external crystal/resonator connected to the X1/X2 pins. At 20 MHz, the instruction execution speed reaches 10 MIPS, enabling real-time response in motor control and sensor acquisition tasks. The UPD78F1144AGK-GAJ-AX maintains full peripheral functionality-including ADC sampling and UART transmission-at this frequency.

Does the UPD78F1144AGK-GAJ-AX include an integrated voltage regulator?

Yes, the UPD78F1144AGK-GAJ-AX incorporates an on-chip voltage regulator controlled via the REGC pin. A 1.0 μF ceramic capacitor must be connected between REGC and EVSS to stabilize the internal 3.3 V supply for the CPU core and digital peripherals. This regulator eliminates the need for an external LDO in many designs, simplifying power architecture while maintaining noise immunity for sensitive analog functions like the 10-bit ADC.

How many analog input channels does the UPD78F1144AGK-GAJ-AX ADC support?

The UPD78F1144AGK-GAJ-AX features a 10-bit successive-approximation ADC with 16 configurable analog input channels. These channels are distributed across multiple ports (P14–P17, P20–P27, P40–P43, P50–P55) and share a common sample-and-hold circuit. Channel selection is software-controlled via the ADCH register, and conversions can be triggered automatically by timers or external events - ensuring deterministic timing without CPU intervention.

Is the UPD78F1144AGK-GAJ-AX pin-compatible with other members of the 78K0R/KE3 family?

The UPD78F1144AGK-GAJ-AX is pin-compatible with other 100-pin QFP variants in the 78K0R/KE3 family, including UPD78F1142AGK-GAJ-AX and UPD78F1143AGK-GAJ-AX. All share identical pin assignments for power, reset, clock, I/O ports, and peripheral signals. However, differences in Flash size and peripheral enablement require firmware validation - the UPD78F1144AGK-GAJ-AX's 128 KB Flash enables larger application code than the 96 KB UPD78F1142AGK-GAJ-AX.

What development tools are officially supported for the UPD78F1144AGK-GAJ-AX?

Renesas officially supports the QB-MINI2 on-chip debug emulator and the CC78K0R C compiler (Ver. 2.00) for the UPD78F1144AGK-GAJ-AX. The RA78K0R assembler package and SM+ system simulator are also validated for this device. Flash programming is performed via PG-FP4 or PG-FP5 programmers using the standard 78K0R serial interface protocol. All tools are documented in User's Manual U17854EJ9V0UD and require no hardware modification to target the UPD78F1144AGK-GAJ-AX specifically.