R5F21124FP#U0 - 16-bit 16MHz 16KB Flash MCU | Renesas Electronics
料号： R5F21124FP#U0 ✓ 量产中R5F21124FP#U0 概述
A microcontroller is a semiconductor device that integrates a CPU core, program memory, data memory, peripheral functions, and I/O into one integrated circuit. The R5F21124FP#U0 belongs to the R8C/12 group of Renesas 16-bit microcontrollers, a family positioned between simple 8-bit controllers and more resource-intensive 32-bit application processors. This device is intended for embedded control, where an application program must handle sensor inputs, actuator outputs, communications, timing, and user-interface functions in one compact component.
The main engineering characteristics visible for this exact MPN are the 16-bit CPU architecture, 16 MHz maximum clock information identified in the product listing, 16KB flash storage, 3 V or 5 V operation, and 32-LQFP packaging. The R5F21124FP#U0 is marked as Pb-Free. Detailed electrical limits, RAM capacity, peripheral channel assignments, clock-tree options, timer resources, communication interfaces, and absolute maximum ratings must be confirmed in the Renesas datasheet before a design is released.
Renesas states that the R8C/12 group is supported for customers that have already adopted these products and recommends the RL78/G14 group for new designs. This lifecycle distinction is important: the R5F21124FP#U0 remains useful for maintenance, continuity, and previously qualified industrial or consumer programs, but engineers should verify roadmap and sourcing conditions before starting a new platform. Existing software, peripheral mapping, and board layouts can make continuity preferable to redesign, provided the product remains suitable for the target application.
Typical uses include compact industrial controllers, sensor-conditioning and monitoring equipment, small appliance controls, communication modules, and legacy embedded systems that require a 16-bit core with embedded flash. The 32-LQFP package provides a conventional quad flat-pack footprint suitable for automated PCB assembly and prototype fabrication. Because the exact pin map and peripheral multiplexing are not reproduced in the product-page search result, board designers should use the manufacturer pin-assignment table when assigning ports, power pins, reset, clock, and programming signals.
This page summarizes the exact R5F21124FP#U0 identity and technical attributes, compares it with verified catalog information, and provides procurement-oriented guidance without presenting unverified competitor substitutions. For current commercial terms, use the Request a Quote form on this page. For a new design, evaluate the recommended RL78/G14 path; for an existing R8C/12 platform, confirm pin compatibility, software support, lifecycle status, and supply continuity through the manufacturer's product documentation.
直接替换替代料： R5F21124FP#U0 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料R5F21124FP#U0 最大额定值与电气特性
| Product Type | 16-bit single-chip microcontroller |
| Series | R8C/1x/12, R8C Tiny Series |
| CPU Architecture | 16-bit R8C CISC core |
| 最大时钟频率 | 16 MHz |
| Flash Program Memory | 16 KB (16K x 8) |
| 工作电源电压 | 3 V or 5 V |
| 封装 | 32-LQFP (7 mm x 7 mm) |
| 引脚数量 | 32 pins |
| 安装类型 | Surface mount |
| Process Technology | High-performance silicon gate CMOS process |
| Lead-Free Status | Pb-Free |
R5F21124FP#U0 32-lqfp (7 mm x 7 mm) 引脚配置指南
R5F21124FP#U0（32-lqfp (7 mm x 7 mm) 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： R5F21124FP#U0.
请参阅 数据手册 以查看完整引脚配置。
典型应用
R5F21124FP#U0 适用于 6 应用s: Industrial Embedded Control, Sensor Monitoring and Signal Conditioning, Small Appliance Controller, Communication Module, Programmable Control and Automation, Legacy Product Maintenance.
Industrial Embedded Control
The R5F21124FP#U0 fits compact industrial control modules where a 16-bit R8C CPU, 16 MHz operating frequency, 16KB flash memory, and 3 V or 5 V operation align with an established control platform. It can consolidate sequencing, digital I/O, timing, and communication functions without adding a separate processor package. The 32-LQFP footprint also supports conventional surface-mount assembly. Because the R8C/12 group is intended for customers that already adopted it, this application is strongest where legacy software, qualification, or board continuity provides more value than moving to a new architecture.
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Sensor Monitoring and Signal Conditioning
The R5F21124FP#U0 can serve as the supervisory controller in a sensor-monitoring design that combines digital sensors, status indicators, and local data processing. Its 16-bit architecture is suitable for control loops and protocol handling that require more computational headroom than a basic 8-bit MCU, while 16KB flash provides room for a focused application program. A 3 V or 5 V design can use the MCU to manage sensor enables, sample timing, and status reporting. Verify the exact timer and serial peripheral assignments in the manufacturer pin and peripheral tables before defining the interface.
推荐
Small Appliance Controller
For a compact appliance or equipment controller, the R5F21124FP#U0 provides a 16-bit R8C core operating at 16 MHz with 16KB of embedded flash in a 32-LQFP package. These resources fit a focused controller responsible for user inputs, relays, indicators, timing, and safety-state sequencing. Operating from 3 V or 5 V supports conventional embedded rails. A new appliance platform should compare the R8C/12 MCU against Renesas's recommended RL78/G14 family; an existing platform with validated firmware and mechanics can gain more from retaining the proven controller.
推荐
Communication Module
The R5F21124FP#U0 can act as the host controller in a small communications module when the design depends on established R8C firmware and a modest embedded-code footprint. The 16 MHz R8C core can coordinate framing, device addressing, status handling, and configuration commands, while the 16KB flash stores application and protocol code. The 32-LQFP package provides a practical pin density for a module with power, clock, programming, and communications connections. Confirm the exact serial-interface channels, alternate functions, and electrical levels in the manufacturer documentation before selecting connectors or transceiver components.
推荐
Programmable Control and Automation
The R5F21124FP#U0 is appropriate for programmable automation blocks that require deterministic embedded logic, digital control, and field-updateable flash memory. Its 16-bit architecture and 16 MHz clock are suitable for a dedicated control endpoint, while 16KB flash allows a self-contained firmware image without an external program-memory device. The 32-LQFP package accommodates a practical number of control and communications connections. For a newly designed automation system, perform a complete peripheral and software comparison with the recommended RL78/G14 path; for an established system, compatibility verification can protect schedule and validation effort.
推荐
Legacy Product Maintenance
The R5F21124FP#U0 is especially relevant to maintenance and continuity programs for products already built around the R8C/12 family. Renesas states that the group is supported for customers that have adopted these products, while recommending RL78/G14 for new designs. This makes the MCU a practical choice when field equipment must retain its firmware image, pin layout, and behavior. A maintenance team should verify exact ordering-code continuity, available package form, programming compatibility, and change-control documentation before using the part for repair or production continuation.
推荐
工程参考数据： R5F21124FP#U0 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 |
|---|---|
| Brand | Renesas Electronics |
| Package | 32-LQFP (7 mm x 7 mm) |
| CPU Architecture | 16-bit R8C CISC |
| Maximum Clock Frequency | 16 MHz |
| Flash Program Memory | 16 KB (16K x 8) |
| Operating Supply Voltage | 3 V or 5 V |
| Lead-Free Status | Pb-Free |
| Process Technology | High-performance silicon gate CMOS process |
| New-Design Recommendation | RL78/G14 recommended by Renesas; R8C/12 supported for existing adopters |
关键差异点
- Established 16-bit R8C control platform （对比 RL78/G14 recommended for new designs)
- Compact 32-LQFP integration （对比 A larger-footprint redesign candidate)
- Dual conventional supply options （对比 A fixed-voltage-only MCU option)
设计说明
Assign the PCB footprint from the Renesas 32-LQFP package drawing rather than from a generic 32-pin LQFP symbol. Confirm body size, lead span, pin pitch, exposed-pad status, courtyard, and orientation against the exact R5F21124FP#U0 package. Route programming and reset signals for reliable service access, provide all required supply pins, and follow the manufacturer's recommended decoupling network. A generic footprint can appear mechanically plausible while producing soldering or probe-access problems.
Do not treat R5F21124FP and R5F21124FP#U0 as interchangeable without checking the complete ordering code, grade, packing, and qualification details. The shorter family name omits suffix information that can affect procurement or documentation. For new projects, also follow Renesas's recommendation to evaluate RL78/G14 because R8C/12 support is directed toward customers that already adopted the group. A software migration may require changes even when the new MCU uses a comparable pin count.
Design the 3 V or 5 V supply rail from the electrical-characteristics table, including allowable input range, I/O levels, startup behavior, and current consumption for the selected clock and peripheral configuration. Place input and bypass capacitors close to the supply pins using the values and placement guidance in the manufacturer datasheet. Confirm the reset and clock arrangements before power-up testing; an apparently unstable firmware image can result from supply sequencing or grounding rather than application code.
合规信息
The Mouser catalog listing identifies the exact MPN as Pb-Free. Formal RoHS, REACH, halogen-free, conflict-minerals, and automotive-qualification statements were not present in the retrieved product summaries and require confirmation from current Renesas compliance documentation.