Renesas UPD78F1503AGC-UEU-AX

Overview

UPD78F1503AGC-UEU-AX from Renesas Electronics is a 16-bit single-chip microcontroller in the 78K0R/LG3 family, featuring 128 KB on-chip Flash memory, 8 KB RAM, and integrated 10-bit ADC with 24 channels. It operates at up to 20 MHz, supports 5V operation, and includes UART, CSI, I²C, and timer peripherals. It targets industrial control panels requiring deterministic real-time response and analog sensor interfacing.

For engineers reviewing the UPD78F1503AGC-UEU-AX datasheet, UPD78F1503AGC-UEU-AX pinout, UPD78F1503AGC-UEU-AX application, or UPD78F1503AGC-UEU-AX equivalent, key selection criteria include Flash endurance (100,000 write/erase cycles), operating temperature range (−40°C to +85°C), and compatibility with RA78K0R toolchain and QB-MINI2 debugger.

Technical Context

The UPD78F1503AGC-UEU-AX implements the 78K0R CPU core with 16-bit architecture, supporting 16-bit data paths and 20-bit addressing. It integrates a 10-bit successive-approximation ADC with sample-and-hold and programmable conversion start triggers via timer or external signal.

Its peripheral set includes three 16-bit timer/counters (with PWM output), two UARTs with LIN support, one CSI interface for synchronous serial communication, and one I²C-compatible interface. The device uses on-chip voltage regulator (REGC pin) for internal logic supply and supports low-power modes including HALT and STOP.

Key Specifications

Pinout & Package

UPD78F1503AGC-UEU-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 Hardware User's Manual Rev.5.01 (Jun 2011), Section 1.3.2 and 2.1.2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F1503AGC-UEU-AX, R5F10PLGCLFB#30 trades Flash capacity and 5 V tolerance for lower active current and modern toolchain support, while UPD78F1504AGC-UEU-AX offers seamless scalability within the same footprint and qualification baseline.

Availability

UPD78F1503AGC-UEU-AX is available at Aetrix Electronics and suitable for industrial HMI panels, building automation controllers, and programmable logic relays requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for UPD78F1503AGC-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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.

The 78K0R/LG3 product line delivers cost-optimized 16-bit MCUs targeting legacy industrial equipment upgrades and applications requiring 5 V robustness, Flash endurance, and mature toolchain stability.

FAQ

What is the maximum operating frequency of the UPD78F1503AGC-UEU-AX?

The UPD78F1503AGC-UEU-AX supports a maximum system clock frequency of 20 MHz. This is achievable using either the on-chip high-speed oscillator (with external crystal or ceramic resonator) or an external clock source. The CPU executes instructions at this frequency, enabling sub-microsecond interrupt latency and precise timing control for real-time tasks. All peripherals-including ADC, UART, and timers-are fully functional at 20 MHz.

Does the UPD78F1503AGC-UEU-AX include an on-chip voltage regulator?

Yes, the UPD78F1503AGC-UEU-AX integrates an on-chip voltage regulator controlled via the REGC pin. When configured with a 10 µF capacitor on REGC, it generates a stable 3.3 V supply for the internal logic core. This allows single-supply 5 V operation while maintaining noise-immune core voltage, eliminating the need for an external LDO in most industrial designs. The regulator is not intended to power external circuitry.

How many ADC input channels does the UPD78F1503AGC-UEU-AX support?

The UPD78F1503AGC-UEU-AX features a 10-bit successive-approximation ADC with 24 selectable analog input channels. These are mapped across Port 5 (AN0–AN7), Port 6 (AN8–AN15), and Port 7 (AN16–AN23), plus dedicated internal references (VREFOUT, AVREFP). Channel selection is software-controlled via the ADPC register, and conversions can be triggered by timer, external signal, or CPU command.

Is the UPD78F1503AGC-UEU-AX pin-compatible with other 78K0R/LG3 devices?

Yes, the UPD78F1503AGC-UEU-AX shares identical pinout and package (100-pin LQFP) with all members of the 78K0R/LG3 group, including UPD78F1504AGC-UEU-AX and UPD78F1505AGC-UEU-AX. This enables direct PCB reuse across variants differing only in Flash size (128 KB vs. 256 KB vs. 384 KB) and RAM allocation. Peripheral pin assignments, power/ground locations, and reset configuration remain consistent.

What development tools are officially supported for the UPD78F1503AGC-UEU-AX?

Renesas officially supports the UPD78F1503AGC-UEU-AX with the RA78K0R C compiler (v2.x), CC78K0R Ver. 2.00, and the QB-MINI2 on-chip debug emulator with programming function. The QB-78K0RLX3 in-circuit emulator is also compatible for advanced trace and timing analysis. All tools target the 78K0R/LG3-specific SFR map and memory layout defined in the Hardware User's Manual Rev.5.01.