Renesas UPD78F0502AMCA2-CAB-G

Overview

UPD78F0502AMCA2-CAB-G from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/Kx2 family, featuring 32 KB on-chip Flash memory, 2 KB RAM, and a 16-bit timer/counter with PWM output capability. It operates at up to 20 MHz using an external crystal (X1) or internal high-speed oscillator, supports 8-channel 10-bit A/D conversion, and targets embedded control in industrial and consumer equipment requiring deterministic real-time response.

For engineers reviewing the UPD78F0502AMCA2-CAB-G datasheet, UPD78F0502AMCA2-CAB-G pinout, UPD78F0502AMCA2-CAB-G application, or UPD78F0502AMCA2-CAB-G equivalent, key selection criteria include its 48-pin LQFP package, 32 KB flash rewrite endurance (10,000 cycles), 10-year data retention, and support for self-programming via on-chip library - critical for field firmware updates in maintenance-sensitive deployments.

Technical Context

The UPD78F0502AMCA2-CAB-G implements the 78K0 CPU core with 16-bit addressing, 128-byte register bank, and instruction cycle time of 0.2 μs at 20 MHz. It integrates a 16-bit multifunction timer (TM00–TM02), serial interface (UART/CSI), and watchdog timer with independent clock source.

Its analog subsystem includes an 8-channel 10-bit successive-approximation A/D converter with conversion time of 10.5 μs (conventional-specification mode), and voltage reference inputs (AVREF/AVSS) supporting ratiometric measurement. The device uses SuperFlash® technology licensed from SST for reliable flash programming.

Key Specifications

Pinout & Package

UPD78F0502AMCA2-CAB-G is housed in a 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch) package compliant with JEDEC MO-220. All pins are CMOS-compatible with VDD = 2.7–5.5 V operation and Schmitt-trigger inputs on key control signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100BGASP#30, UPD78F0502AMCA2-CAB-G delivers superior analog integrity via dedicated EVDD/EVSS but consumes more active power; versus UPD78F0501AMCA2-CAB-G, it doubles Flash and RAM capacity while maintaining identical footprint and peripheral timing - enabling feature-rich firmware without layout change.

Availability

UPD78F0502AMCA2-CAB-G is available at Aetrix Electronics and suitable for industrial motor control, smart home sensor hubs, and office equipment power management requiring stable component supply across extended production lifecycles.

Supply support for UPD78F0502AMCA2-CAB-G 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/Kx2 product line was designed for cost-sensitive, real-time embedded control applications demanding high reliability, integrated analog peripherals, and long-term supply stability in industrial and consumer equipment.

FAQ

What is the maximum operating frequency of the UPD78F0502AMCA2-CAB-G?

The UPD78F0502AMCA2-CAB-G supports a maximum system clock frequency of 20 MHz, achievable using either an external crystal (X1/X2) or the internal high-speed oscillator. At this frequency, the instruction cycle time is 0.2 μs, enabling deterministic real-time response for time-critical control tasks such as motor commutation or sensor sampling.

Does the UPD78F0502AMCA2-CAB-G support in-system programming?

Yes, the UPD78F0502AMCA2-CAB-G supports in-system programming via its on-chip self-programming library, accessible through UART or CSI interfaces. This allows firmware updates without removing the device from the board, provided the application reserves protected flash sectors and implements the required command sequence per Renesas Application Note U17516E.

What are the analog power supply requirements for the UPD78F0502AMCA2-CAB-G?

The UPD78F0502AMCA2-CAB-G requires two independent power domains: VDD/EVDD (2.7–5.5 V) and VSS/EVSS. EVDD and EVSS must be routed separately from digital supplies to minimize noise coupling into the 10-bit A/D converter and internal voltage reference - failure to isolate these nets degrades A/D accuracy beyond ±2 LSB.

How many I/O pins does the UPD78F0502AMCA2-CAB-G provide?

The UPD78F0502AMCA2-CAB-G provides 41 programmable CMOS I/O pins across ports P0–P7 and P12–P14. Each pin supports multiple functions including general-purpose I/O, UART, CSI, timer I/O, and A/D input - with configurable pull-up/pull-down resistors and Schmitt-trigger inputs for noise immunity in industrial environments.

Is the UPD78F0502AMCA2-CAB-G pin-compatible with other 78K0/Kx2 devices?

Yes, the UPD78F0502AMCA2-CAB-G shares the same 48-pin LQFP package and pin assignment with other members of the 78K0/KB2 subgroup, including UPD78F0500AMCA2-CAB-G, UPD78F0501AMCA2-CAB-G, and UPD78F0503AMCA2-CAB-G. Peripheral register maps and interrupt vectors are consistent across this subgroup, enabling hardware reuse across firmware variants.