Renesas UPD78F1003GB(R)-GAF-AX

Overview

UPD78F1003GB(R)-GAF-AX from Renesas Electronics is a 16-bit single-chip microcontroller in the 78K0R/KC3-L family, featuring 128 KB on-chip Flash memory, 8 KB RAM, and a maximum operating frequency of 20 MHz. It integrates a 10-bit ADC (16 channels), UART, CSI, I²C, and 16-bit timer arrays, and targets industrial control and sensor interface applications requiring deterministic real-time response.

For engineers reviewing the UPD78F1003GB(R)-GAF-AX datasheet, UPD78F1003GB(R)-GAF-AX pinout, UPD78F1003GB(R)-GAF-AX application, or UPD78F1003GB(R)-GAF-AX equivalent, key selection criteria include Flash endurance (100,000 write/erase cycles), operating voltage range (2.7–5.5 V), and support for low-power STOP mode with wake-up via external interrupt or RTC alarm.

Technical Context

The UPD78F1003GB(R)-GAF-AX implements the 78K0R CPU core with 16-bit architecture, Harvard memory organization, and instruction set compatible with earlier 78K/III devices. It supports three power-saving modes - HALT, STOP, and SNOOZE - with sub-μA current draw in STOP mode when RTC and LVD remain active.

On-chip peripherals include a 16-bit multifunction timer array unit (TAU) with capture/compare/PWM functions, a watchdog timer (WDT) with independent clock source, and a low-voltage detection (LVD) circuit configurable at 2.4 V or 4.2 V thresholds. All I/O ports are CMOS-compatible with programmable pull-up resistors and noise filter capability.

Key Specifications

Pinout & Package

The UPD78F1003GB(R)-GAF-AX is housed in a 64-pin LQFP package (JEDEC MS-026BAC) with 0.5 mm lead pitch and exposed thermal pad for enhanced thermal dissipation in continuous industrial operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F1003GB(R)-GAF-AX, R5F100PLDFB#30 offers higher clock speed and better active power efficiency but requires software emulation of CRC; UPD78F1002GB(R)-GAF-AX provides identical functionality at lower memory density and cost, with guaranteed pin compatibility.

Availability

UPD78F1003GB(R)-GAF-AX is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and home appliance control panels requiring stable component supply and long-term lifecycle assurance.

Supply support for UPD78F1003GB(R)-GAF-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/KC3-L product line delivers cost-optimized 16-bit MCUs for deterministic real-time control in industrial equipment, building automation, and white goods - emphasizing reliability, low-power operation, and seamless legacy software migration.

FAQ

What is the maximum operating frequency of the UPD78F1003GB(R)-GAF-AX?

The UPD78F1003GB(R)-GAF-AX operates at up to 20 MHz using its internal high-speed oscillator, or up to 20 MHz with PLL multiplication from an external crystal. Its 78K0R CPU core achieves 16.7 MIPS at 20 MHz, enabling fast interrupt response and real-time control loops. The device maintains full specification compliance across its −40°C to +85°C industrial temperature range at this frequency.

Does the UPD78F1003GB(R)-GAF-AX support in-system programming (ISP)?

Yes, the UPD78F1003GB(R)-GAF-AX supports in-system programming via its on-chip debug interface using Renesas' standard flash programming protocol. Firmware updates can be performed through UART or dedicated SWD pins without removing the device from the PCB. The UPD78F1003GB(R)-GAF-AX includes sector lock bits and boot-mode configuration (via FLMD0) to secure critical bootloader regions during field updates.

What power supply configurations does the UPD78F1003GB(R)-GAF-AX require?

The UPD78F1003GB(R)-GAF-AX requires two independent power domains: VDD (digital core and I/O) and EVDD (analog and peripheral circuits), each rated 2.7–5.5 V. Separate ground connections - VSS (digital) and EVSS (analog) - must be routed with low-impedance paths and joined at a single point near the regulator. This dual-supply architecture isolates noise-sensitive ADC and timer circuits from digital switching transients.

How many analog input channels does the UPD78F1003GB(R)-GAF-AX ADC support?

The UPD78F1003GB(R)-GAF-AX integrates a 10-bit successive approximation ADC with 16 selectable analog input channels. These channels map to dedicated pins including P00–P07, P10–P13, and P150–P153, and support simultaneous sampling via internal multiplexer control. The ADC features built-in offset calibration, programmable conversion time (1.5–16 μs), and automatic result transfer to RAM via DMA.

Is the UPD78F1003GB(R)-GAF-AX pin-compatible with other members of the 78K0R/KC3-L family?

Yes, the UPD78F1003GB(R)-GAF-AX shares identical 64-pin LQFP packaging and pin assignment with other 78K0R/KC3-L devices including UPD78F1000, UPD78F1001, and UPD78F1002. All share the same peripheral register map, interrupt vector table, and I/O port structure - enabling hardware reuse across variants. Differences are limited to Flash/RAM capacity and minor feature enablement flags, verified in the Renesas 78K0R/Kx3-L Hardware User's Manual Rev.4.00.