R5F21124FP#U0 - 16-bit 16MHz 16KB Flash MCU | Renesas Electronics
MPN： R5F21124FP#U0 ✓ 啟用中R5F21124FP#U0 概覽
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.
直接替換替代品，適用於 R5F21124FP#U0 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此產品無可直接替換的替代品。
申請替代品R5F21124FP#U0 最大額定值與電氣特性
| Product Type | 16-bit single-chip microcontroller |
| Series | R8C/1x/12, R8C Tiny Series |
| CPU Architecture | 16-bit R8C CISC core |
| 最大時脈頻率 | 16 MHz |
| Flash Program Memory | 16 KB (16K x 8) |
| 工作電源電壓 | 3 V or 5 V |
| 封裝 | 32-LQFP (7 mm x 7 mm) |
| 腳位數 | 32 pins |
| 安裝類型 | Surface mount |
| Process Technology | High-performance silicon gate CMOS process |
| Lead-Free Status | Pb-Free |
R5F21124FP#U0 32-lqfp (7 mm x 7 mm) 腳位配置指南
R5F21124FP#U0（32-lqfp (7 mm x 7 mm) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： R5F21124FP#U0.
請參閱 資料表 以查看完整腳位配置。
典型應用
R5F21124FP#U0 適用於 6 應用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.
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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.
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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.
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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.
推薦
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.
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工程參考資料，適用於 R5F21124FP#U0 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| 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 |
主要差異化特點
- Established 16-bit R8C control platform (對比RL78/G14 recommended for new designs)
- Compact 32-LQFP integration (對比A larger-footprint redesign candidate)
- Dual conventional supply options (對比A fixed-voltage-only MCU option)
設計說明
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.
合規資訊
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.