Renesas UPD78F0512AMC-GAA-AX

Overview

UPD78F0512AMC-GAA-AX from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/KC2 family, featuring 64 KB on-chip flash memory, 4 KB RAM, and a 16-bit timer/counter with PWM output capability. It operates at up to 20 MHz using an external crystal (1–20 MHz) or internal high-speed oscillator (8 MHz), supports 5V operation, and integrates UART, I²C, and 10-bit ADC with 8 input channels. It is used in industrial control panels requiring deterministic real-time response and firmware-upgradable logic.

For engineers reviewing the UPD78F0512AMC-GAA-AX datasheet, UPD78F0512AMC-GAA-AX pinout, UPD78F0512AMC-GAA-AX application, or UPD78F0512AMC-GAA-AX equivalent, key selection criteria include flash endurance (100,000 write/erase cycles), A/D conversion time (1.2 μs typical), reset source options (power-on, watchdog, external), and support for self-programming via on-chip library.

Technical Context

The UPD78F0512AMC-GAA-AX implements the 78K0 CPU core with 16-bit address space, supporting 131 instructions including bit manipulation and conditional skip. Its peripheral set includes three 16-bit timers (one with input capture/output compare), one serial interface (UART or clock-synchronous), one I²C-compatible interface, and an 8-channel 10-bit successive-approximation ADC with programmable sampling time.

It uses a dual-power-supply architecture: EVDD/EVSS for analog circuitry (ADC reference) and VDD/VSS for digital logic, enabling noise-isolated mixed-signal operation. The device supports two low-power modes - HALT and STOP - with wake-up via external interrupt, timer match, or serial receive event.

Key Specifications

Pinout & Package

UPD78F0512AMC-GAA-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 across 15 I/O ports (P0–P7, P12–P14), power/ground terminals, reset, oscillator inputs (X1/X2), and dedicated peripheral pins (TXD/RXD, SCL/SDA, AD0–AD7).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with UPD78F0512AMC-GAA-AX, R5F100LEAFB#30 offers superior active power efficiency but sacrifices analog noise immunity, while UPD78F0513AMC-GAA-AX extends functionality with CAN at no pinout or footprint penalty-making it a direct upgrade path where bus communication is required.

Availability

UPD78F0512AMC-GAA-AX is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, and home appliance control boards requiring stable component supply and long-term production continuity.

Supply support for UPD78F0512AMC-GAA-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 78K0/KC2 product line delivers cost-optimized 8-bit MCUs with balanced performance, integrated peripherals, and robust industrial-grade reliability for resource-constrained embedded systems.

FAQ

What is the maximum operating frequency of the UPD78F0512AMC-GAA-AX?

The UPD78F0512AMC-GAA-AX supports a maximum system clock frequency of 20 MHz when driven by an external crystal oscillator (1–20 MHz range). It also includes an internal high-speed oscillator rated at 8 MHz, usable without external components. Both clock sources feed the same CPU core, and instruction execution time scales linearly with clock frequency-enabling precise timing-critical tasks such as motor commutation and ADC sampling synchronization.

Does the UPD78F0512AMC-GAA-AX support in-system programming (ISP)?

Yes, the UPD78F0512AMC-GAA-AX supports full in-system programming via its on-chip self-programming library. This feature allows firmware updates directly in the target application without removing the chip or using an external programmer. The UPD78F0512AMC-GAA-AX implements flash write/erase operations under software control with built-in error checking, and the library occupies minimal code space while preserving RAM and interrupt latency requirements.

What are the power supply requirements for analog and digital sections of the UPD78F0512AMC-GAA-AX?

The UPD78F0512AMC-GAA-AX requires two independent 4.0 V to 5.5 V supplies: VDD/VSS for digital logic and EVDD/EVSS for analog circuitry including the ADC reference. This dual-domain design isolates sensitive analog measurements from digital switching noise. Decoupling capacitors (0.1 μF ceramic + 10 μF tantalum) must be placed near each supply pair, and EVDD should be routed separately from VDD on the PCB to maintain ADC accuracy within ±1 LSB over temperature.

How many ADC input channels does the UPD78F0512AMC-GAA-AX provide, and what is its conversion speed?

The UPD78F0512AMC-GAA-AX integrates an 8-channel, 10-bit successive-approximation ADC with a typical conversion time of 1.2 μs per sample. All eight channels (AD0–AD7) map directly to port P20–P27, and the ADC supports both single-shot and continuous scan modes. Conversion results are stored in dedicated 16-bit result registers, and the module includes programmable sampling time control to optimize accuracy for varying source impedances.

Is the UPD78F0512AMC-GAA-AX pin-compatible with other members of the 78K0/KC2 family?

Yes, the UPD78F0512AMC-GAA-AX is pin-compatible with other 100-pin LQFP variants in the 78K0/KC2 family, including UPD78F0511AMC-GAA-AX, UPD78F0513AMC-GAA-AX, and UPD78F0514AMC-GAA-AX. Identical pin assignments for power, reset, oscillator, and I/O ports allow drop-in replacement in most cases-though functional differences (e.g., presence of CAN in UPD78F0513AMC-GAA-AX) require corresponding firmware and external circuit validation before substitution.