R5F21113FP#W4 - 16-Bit 20MHz 12KB Flash MCU | Renesas
MPN： R5F21113FP#W4 ✗ 停產R5F21113FP#W4 概覽
An R8C microcontroller is a 16-bit embedded-control component within the broader MCU and microprocessor hierarchy. It combines flash-resident firmware, internal data RAM, timers, serial interfaces, and general-purpose I/O in one device. This integration allows compact control systems to replace separate processor, memory, and peripheral components while keeping firmware, board area, and assembly requirements consolidated.
Key features include 12 KB of flash memory organized as 12K by 8 bytes, 768 bytes of RAM, 22 general-purpose I/O lines, and a maximum listed operating frequency of 20 MHz. The internal oscillator reduces the number of external timing components required in many designs. Tray packaging supports volume production and automated PCB assembly when the board geometry and component orientation match the 32-pin LQFP footprint.
The R8C/1x/11 architecture is intended for compact embedded controllers that benefit from 16-bit instruction handling and efficient peripheral integration. The manufacturer describes the R8C/11 family as supported primarily for customers that previously adopted these products and recommends the RL78/G14 family for new designs. Legacy-product support status should therefore be considered when planning a long-lived design.
Typical uses include industrial control modules, compact instrumentation, appliance controllers, embedded interface products, and small automation equipment. The 22 available I/O pins provide connectivity for sensors, indicators, switches, communications links, and discrete actuators, while the 20 MHz operating rate supports time-sensitive control tasks.
PCB planning should follow the manufacturer package drawing and pin-assignment table. Confirm oscillator requirements, supply voltage limits, programming connections, and all peripheral multiplexing before releasing a layout. Because firmware, toolchain, and peripheral behavior are architecture-specific, treat software migration as part of replacement planning rather than assuming electrical similarity alone guarantees interchangeability.
This product page consolidates the device identity, memory organization, package characteristics, sourcing information, and replacement constraints into a design-focused reference. It also distinguishes true drop-in interchangeability from merely similar microcontrollers by requiring the same footprint, pin compatibility, suitable electrical parameters, and compatible firmware behavior.
直接替換替代品，適用於 R5F21113FP#W4 — 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。
此系列的變體
與下列產品可直接替換的同系列型號： R5F21113FP#W4 （相同外形與佔位） — 差異在於 Product Type.
此產品無可直接替換的替代品。
申請替代品R5F21113FP#W4 最大額定值與電氣特性
| Product Type | 16-bit R8C/1x/11 microcontroller |
| CPU Core | R8C/Tiny Series |
| CPU Architecture | 16-bit |
| Maximum Operating Frequency | 20 MHz |
| Program Memory Size | 12 KB (12K x 8) |
| Program Memory Type | Flash |
| RAM Size | 768 x 8 bits (768 bytes) |
| Number of I/O Pins | 22 |
| Oscillator Type | Internal |
| Package Type | 32-pin LQFP |
| Package Dimensions | 7 mm x 7 mm |
| 安裝類型 | Surface mount |
| Packaging | Tray |
| Manufacturing Technology | High-performance silicon gate CMOS |
R5F21113FP#W4 7 mm x 7 mm 腳位配置指南
R5F21113FP#W4（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： R5F21113FP#W4.
請參閱 資料表 以查看完整腳位配置。
典型應用
R5F21113FP#W4 適用於 6 應用s: Compact Industrial Control Module, Appliance Controller, Embedded Instrumentation, Small Automation Controller, Legacy Equipment Upgrade, Sensor and Switch Interface Hub.
Compact Industrial Control Module
The R5F21113FP#W4 fits compact industrial control modules that coordinate sensors, indicators, switches, and actuators within a limited board area. Its 16-bit R8C/Tiny Series core operates up to 20 MHz, providing useful timing headroom for responsive control tasks, while 22 I/O lines support multiple external signals. The 12 KB flash budget suits a focused control program, and 768 bytes of RAM provides a defined working area. Engineers should confirm operating-temperature limits, supply range, and peripheral requirements before release.
Appliance Controller
The R5F21113FP#W4 is suitable for appliance controllers that manage buttons, displays, relays, sensors, and sequencing logic in one embedded platform. Its 20 MHz maximum operating rate supports time-sensitive control, while the 22 I/O pins can reduce the need for external interface logic. The 12 KB flash capacity is suitable when firmware is limited to a focused appliance function, and the internal oscillator can simplify designs that do not require a high-accuracy external time base. Validate motor, mains, and safety isolation separately.
Embedded Instrumentation
The R5F21113FP#W4 can serve as the controller in small measurement instruments where a display, keypad, sensor interface, and communications function must share one microcontroller. The 16-bit architecture and 20 MHz operating speed support responsive sampling and control, while 22 I/O pins expand board-level connectivity. Its 768 bytes of RAM may be sufficient for compact data buffers but requires careful firmware planning. Confirm the required serial interfaces, timers, analog functions, and timing accuracy against the manufacturer datasheet.
Small Automation Controller
The R5F21113FP#W4 is appropriate for small automation controllers that execute deterministic sequences and interface with external sensors and actuators. Its 16-bit CPU handles the broader address and data operations associated with embedded automation logic, and the 20 MHz rate provides margin for multiple interrupt-driven tasks. Twenty-two I/O lines can connect status inputs and discrete outputs. Because the family is positioned for existing-product support, use lifecycle planning and production-change monitoring when deploying it in new automation equipment.
Legacy Equipment Upgrade
The R5F21113FP#W4 is particularly relevant when maintaining or cloning an existing R8C/11-based controller because its 12 KB flash, 768-byte RAM, 22 I/O pins, 20 MHz speed, and 32-LQFP package establish the baseline for board-level compatibility. An upgrade must still be checked at the pin, peripheral, and software levels rather than relying on memory size alone. Preserve the original clock configuration, programming method, interrupt structure, and package drawing to reduce integration risk.
Sensor and Switch Interface Hub
The R5F21113FP#W4 can coordinate discrete sensors, switches, indicators, and small actuators in a distributed interface hub. Its 22 I/O lines provide the principal connection count, and the 20 MHz operating rate allows interrupt-driven input handling and output timing. The internal oscillator can reduce external component requirements in non-precision systems. Firmware must account for the limited 768-byte RAM and the 12 KB program-memory ceiling, particularly when adding protocol stacks, diagnostics, or field-upgrade functions.
工程參考資料，適用於 R5F21113FP#W4 — 比較、設計指引及合規資訊。
選型指南
設計說明
Use the manufacturer 32-pin LQFP package drawing as the authority for land pattern, pin-one orientation, courtyard limits, and solder-mask clearance. The package is identified as 7 mm by 7 mm and surface mount. Route programming signals, reset, clock, supply, and ground directly from their assigned pins, and preserve a direct ground path beneath or beside the device where the package drawing permits it.
Determine the regulator from the final operating voltage, clock configuration, and peripheral-load budget rather than from the 20 MHz headline frequency alone. Decoupling must follow the manufacturer datasheet's recommended capacitance, voltage rating, and ESR limits. Check startup current and I/O injection limits before enabling external circuitry, because an undersized supply can cause brownout behavior during reset or peripheral activity.
Do not treat a similar R8C device as a direct replacement without checking every pin function and peripheral mapping. Memory capacity, CPU speed, package size, and I/O count are not enough to establish interchangeability. For an existing design, verify the interrupt vector layout, timer channels, serial interfaces, oscillator pins, programming mode, and active operating grade before approving a substitution or reusing the PCB.
The operating frequency influences dynamic power consumption, but a meaningful thermal estimate requires the actual supply voltage, active duty cycle, enabled peripherals, and package thermal data. Record those operating values before calculating junction rise. Use the manufacturer's recommended PCB land pattern and copper area, and compare the calculated worst-case junction temperature with the device's specified operating-temperature range.
合規資訊
The product information identifies the R5F21113FP family as an R8C/11 microcontroller but does not state compliance or environmental-certification details for the exact ordering code. AEC-Q100 is not applicable because this is a general-purpose microcontroller rather than an automotive-qualified device.
