R5F21122FP#U0 - 16-Bit 16MHz R8C MCU | Renesas Electronics
N.º de pieza: R5F21122FP#U0 ✓ ActivoR5F21122FP#U0 Descripción general
An R8C microcontroller is a 16-bit CISC-based control device within the broader embedded-microcontroller and semiconductor hierarchy. The R8C Tiny Series core combines compact instruction encoding with a 1 Mb address space, allowing embedded designers to balance processing performance, memory capacity, and board area. The R5F21122FP#U0 is positioned for cost-sensitive industrial, appliance, instrumentation, and general embedded-control applications.
Key characteristics include 16-bit processing, an operating clock of 16 MHz, 8 KB of Flash memory, 4 KB of data Flash, and 3/5 V operation. Its R8C/1x/12 group designation identifies the core and device family, while the 32-pin LQFP exposes the required peripheral and power connections in a standard surface-mount footprint. The silicon-gate CMOS process supports integration of the CPU core, program memory, data Flash, timers, serial interfaces, and control peripherals.
The manufacturer's product page describes a device built around the R8C Tiny Series CPU core with sophisticated instructions designed for high instruction efficiency. A 1 Mb address space provides substantially more architectural range than the 8 KB physical Flash allocation alone suggests. This addressability supports organized firmware structures and expansion of peripheral or memory mapping within the R8C architecture, although the complete map should be confirmed in the manufacturer datasheet.
Typical uses include industrial equipment, consumer appliances, sensor controllers, building controls, motor-control peripherals, and compact embedded instruments. The 32-LQFP package is particularly useful where a smaller footprint than a high-pin-count MCU is desirable while retaining enough I/O for standard control functions. The 3/5 V supply requirement also suits systems built around legacy-compatible embedded-control architectures.
Designers should verify the complete peripheral set, interrupt behavior, electrical limits, and exact pin assignments in the manufacturer datasheet before schematic capture. PCB layout must preserve adequate clearance around all 32 leads and route sensitive oscillator and supply connections appropriately. Firmware selection should account for the 8 KB program-memory ceiling, while any use of data Flash requires the appropriate endurance and write-cycle handling from the device documentation.
This product page combines manufacturer and distributor technical information, package details, engineering-oriented application guidance, and an honest drop-in replacement assessment. It is intended to help engineers evaluate memory constraints, pin compatibility, supply requirements, and design tradeoffs before committing the R5F21122FP#U0 to an embedded-control design.
Alternativas directas para R5F21122FP#U0 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
R5F21112DFP#U0
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
R5F21122FP#U0 Valores máximos y características eléctricas
| Product Type | 16-bit embedded microcontroller |
| CPU Core | R8C Tiny Series |
| Device Group | R8C/1x/12 |
| Instruction Set | CISC |
| CPU Clock | 16 MHz |
| Program Memory Type | Flash |
| Program Memory Size | 8 KB (8K x 8) |
| Data Flash Size | 4 KB |
| Address Space | 1 Mb |
| Tensión de alimentación de funcionamiento | 3 V to 5 V |
| Package Type | 32-pin plastic-molded LQFP |
| Package Dimensions | 7 x 7 mm |
| Tipo de montaje | Surface Mount |
| Process Technology | High-performance silicon gate CMOS |
| Packaging Form | Tray |
| Lead-Free Status | Pb-Free |
Guía de configuración de pines de R5F21122FP#U0 7 x 7 mm
Configuración de pines para R5F21122FP#U0 (encapsulado 7 x 7 mm). Este CI digital incluye GPIO, interfaces de comunicación (UART, SPI, I2C) y pines de alimentación. Consulte la hoja de datos del fabricante para conocer las funciones alternativas de los pines y las opciones de configuración. Esencial para el diseño de sistemas embebidos y el diseño de PCB.
No hay datos detallados de patillaje disponibles para R5F21122FP#U0.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
R5F21122FP#U0 es adecuado para 6 aplicacións: Industrial Equipment Controller, Appliance Control Module, Sensor Signal Conditioning, Motor and Relay Control, Building and Environmental Control, Compact Embedded Instrument.
Industrial Equipment Controller
The R5F21122FP#U0 fits compact industrial equipment controllers that coordinate digital inputs, timers, and serial control functions without requiring a large memory footprint. Its 16-bit R8C Tiny Series core operates at up to 16 MHz, while 8 KB of Flash supports a focused control program and 4 KB of data Flash provides nonvolatile parameter storage. The 3/5 V operating range aligns with common industrial control boards. Keep firmware modular because the 8 KB program limit is restrictive, and verify the exact timer and serial-interface allocations in the manufacturer pin description before finalizing the schematic.
Recomendado
Appliance Control Module
R5F21122FP#U0 is appropriate for appliance control modules that manage switches, relays, indicators, and a defined sequence of user-interface or sensor events. The 16 MHz R8C processor provides efficient execution for real-time control tasks, and the 32-pin LQFP limits board area compared with higher-pin-count microcontrollers. Its 8 KB Flash capacity suits compact, focused firmware rather than feature-heavy connectivity stacks. Use the 3 V to 5 V supply capability to simplify shared rails, while checking timing, port width, and peripheral sharing against the package pins.
Recomendado
Sensor Signal Conditioning
The R5F21122FP#U0 can serve as the supervisory controller in a sensor-conditioning assembly when the required interface consists mainly of digital sensing, switching, and low-speed acquisition. Its 16-bit R8C architecture supports efficient control-flow and arithmetic compared with an 8-bit general-purpose MCU, while the 1 Mb architectural address space provides a well-defined memory map for the R8C platform. The device's actual ADC resources and peripheral allocation must be confirmed before selecting it for analog measurement. If those resources are insufficient, choose a higher-performance MCU rather than expanding the design around firmware workarounds.
Recomendado
Motor and Relay Control
R5F21122FP#U0 is suitable for small motor, relay, and actuator control boards where a deterministic 16-bit control loop, compact package, and modest firmware footprint are desired. The 16 MHz R8C core can coordinate pulse timing, interlocks, state-machine logic, and safety-oriented sequencing within the limits of the 8 KB Flash program area. The 32-LQFP package provides a practical surface-mount footprint for multilayer control boards. Validate timer channels, output drive capability, and pin multiplexing in the manufacturer datasheet, and place protection and driver circuitry separately from the microcontroller pins.
Recomendado
Building and Environmental Control
The R5F21122FP#U0 can support compact HVAC, lighting-control, or environmental-monitoring modules that need local logic, timers, and communication to a higher-level controller. Its 3/5 V operation supports common control-system rails, and the 16-bit architecture is appropriate for multichannel sequencing and debounce logic. The 32-LQFP package helps reduce controller footprint, although external interface transistors may be required for loads. Structure the firmware around the 8 KB Flash ceiling and use the 4 KB data Flash only when nonvolatile settings and appropriate write management are required.
Recomendado
Compact Embedded Instrument
R5F21122FP#U0 fits compact measurement and test instruments that use the MCU for front-panel logic, status indication, data preparation, and communications control. Its 16 MHz clock supports timely handling of routine measurements, while the 1 Mb address space provides a broad architectural framework even though physical Flash is limited to 8 KB. A 32-pin LQFP permits a compact board and conventional surface-mount assembly. Confirm whether the instrument requires an on-chip ADC, enough timers, or a high-speed serial interface; select a larger MCU when those requirements exceed the available resources.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para R5F21122FP#U0 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | R5F21112DFP#U0 |
|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics |
| Package | 32-LQFP (7x7) | 32-LQFP tray |
| CPU Architecture | 16-bit R8C CISC | 16-bit R8C CISC |
| Program Memory | 8 KB Flash | 8 KB Flash |
| Operating Voltage | 3 V to 5 V | 3.3 V/5 V class |
| Packaging Form | Tray | Tray |
Diferenciadores clave
- Compact 16-bit control in a 32-lead package (frente a R5F21112DFP#U0)
- Defined program-memory and data-storage allocation (frente a R5F21112DFP#U0)
- 16 MHz control performance in a compact footprint (frente a R5F21112DFP#U0)
Notas de diseño
Design the power rails for both logic and attached peripherals before placing the R5F21122FP#U0. The device operates in the 3/5 V class, but its exact input-voltage and I/O-level limits must be taken from the manufacturer electrical-characteristics table. Place the required bypass capacitors close to the supply and ground pins, provide a clean return path, and isolate noisy loads such as relays or motors through separate driver circuitry. Avoid relying on the microcontroller's general-purpose I/O for loads that exceed its specified output-current limits.
Use the manufacturer pin-description table and package drawing to assign all 32 LQFP leads before routing. Keep the crystal or external-clock network close to the clock pins, maintain a compact ground reference, and avoid routing high-current switching signals beneath sensitive clock or reset traces. Confirm the pin-1 orientation mechanically against the PCB footprint. Because pin-level alternatives exist, preserve the land pattern and verify every peripheral multiplexing option before reusing the design with a related device.
Treat the 8 KB Flash limit as the dominant firmware-planning constraint. Reserve space for vectors, the startup routine, application code, calibration constants, and upgrade logic, and use the 4 KB data Flash only with the documented programming and endurance procedure. Do not infer an ADC, UART, timer count, or GPIO width from family naming alone; each listed function and its alternate-pin relationship must be confirmed in the exact device documentation before PCB and firmware design begins.
Información de cumplimiento
The Mouser listing identifies the exact device as Pb-Free. No explicit RoHS, REACH, halogen-free, conflict-minerals, or AEC-Q100 qualification statement appears in the product information, so those statuses remain unknown rather than assumed.
