R5F212BCSDFP - 16-bit 20MHz 128KB Flash MCU 64-LFQFP | Renesas
MPN： R5F212BCSDFP ✓ 啟用中R5F212BCSDFP 概覽
An R8C/Tiny MCU is a compact, high-efficiency 16-bit microcontroller core optimised for embedded control applications, sitting in the broader hierarchy of 16-bit microcontrollers -> microcontrollers (MCU) -> microprocessors and microcontrollers -> semiconductor ICs. The R8C architecture combines a CISC-style instruction set with a 1 MB linear address space and high code density, making it well-suited to industrial and consumer applications requiring deterministic real-time control.
Key features include 128 KB program Flash with single-voltage write/erase, 2 KB DataFlash for non-volatile data, an integrated voltage detector, on-chip debugger interface, multiple timers, a 10-bit A/D converter, and a rich serial-interface set (UART, I2C, SSI). The 64-LFQFP package provides generous I/O for peripheral expansion while keeping the board footprint compact.
The R8C/2B group uses a Harvard-style internal bus architecture with a dedicated Flash memory controller, supporting in-system programming and background operation. The CPU core executes most instructions in one cycle at 20 MHz, and the architecture supports compact table-lookup instructions and hardware multiply/divide, enabling efficient closed-loop control firmware.
Typical applications include industrial sensor signal conditioning, motor control subsystems, HVAC controllers, white goods control boards, and battery management secondary MCUs. The wide operating voltage range and small package also suit handheld measurement instruments and automotive body ECUs in non-safety-critical roles.
When designing with this part, observe the decoupling and oscillator-layout guidelines from Renesas' R8C/2B hardware manual. The R8C/2B group is supported only for customers who have already adopted these products; Renesas recommends the RL78/G14 group for new designs, but the R5F212BCSDFP remains fully supported and in active production for existing programs.
This page consolidates distributor pricing, lifecycle status, drop-in compatible variants, and PCB-level design notes that go beyond the manufacturer datasheet, allowing design engineers and procurement teams to make informed sourcing decisions in a single view.
直接替換替代品，適用於 R5F212BCSDFP — 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： R5F212BCSDFP （相同外形與佔位） — 差異在於 A/D Converter, Operating Temperature, Package, Timers, Watchdog Timer.
R5F212BCSNFP
✅ 直接替換📋 參考替代品（不在目錄中）
R5F212B8SDFP
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
R5F212B4SDFP
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
R5F211B4SP#W4
✅ 直接替換聯絡詢價
查看資料表 →R5F212BCSDFP#V2
✅ 直接替換📋 參考替代品（不在目錄中）
R5F212BCSDFP 最大額定值與電氣特性
| Core Architecture | R8C/Tiny Series (16-bit CISC) |
| Program Memory (Flash) | 128 KB (128K x 8) |
| DataFlash / NV Data | 2 KB |
| Maximum CPU Clock | 20 MHz |
| Supply Voltage Range | 2 V to 5.5 V (per R8C/2B group datasheet, MCU 2/5V) |
| 工作溫度 | -40C to +85C (industrial, I-temp) |
| 封裝 | 64-LFQFP (10x10 mm) |
| 安裝類型 | Surface Mount |
| A/D Converter | 10-bit (per R8C/2B group) |
| Timers | Multiple 8-bit/16-bit timers (per R8C/2B group) |
| Serial Interfaces | UART, I2C, Synchronous Serial Interface (SSI) |
| On-chip Debugger | Yes (single-wire) |
| Watchdog Timer | Yes (per R8C/2B group) |
| Voltage Detector (LVD) | Yes, integrated |
| Lead-Free / Pb-Free | Yes (Pb-free plating) |
| RoHS 狀態 | Compliant |
R5F212BCSDFP 腳位配置
| 腳位 1 | P4_5 — Port 4 bit 5 / peripheral function (per R8C/2B pin table) |
| 腳位 2 | P4_6 — Port 4 bit 6 / peripheral function |
| 腳位 3 | P4_7 — Port 4 bit 7 / peripheral function |
| 腳位 4 | VCC — Digital supply voltage (2 V to 5.5 V) |
| 腳位 5 | VSS — Digital ground |
| 腳位 6 | MODE — Mode select pin |
| 腳位 7 | RESET — Reset input (active low) |
| 腳位 8 | XIN — External clock input |
| 腳位 9 | XOUT — External clock output |
| 腳位 10 | VREF — A/D converter reference voltage |
| 腳位 11 | AVSS — Analog ground |
| 腳位 12 | P0_0 — Port 0 bit 0 / analog input AN0 |
| 腳位 13 | P0_1 — Port 0 bit 1 / analog input AN1 |
| 腳位 14 | P0_2 — Port 0 bit 2 / analog input AN2 |
| 腳位 15 | P0_3 — Port 0 bit 3 / analog input AN3 |
| 腳位 16 | P0_4 — Port 0 bit 4 / analog input AN4 |
| 腳位 17 | P0_5 — Port 0 bit 5 / analog input AN5 |
| 腳位 18 | P0_6 — Port 0 bit 6 / analog input AN6 |
| 腳位 19 | P0_7 — Port 0 bit 7 / analog input AN7 |
| 腳位 20 | P1_0 — Port 1 bit 0 / peripheral function |
| 腳位 21 | P1_1 — Port 1 bit 1 / peripheral function |
| 腳位 22 | P1_2 — Port 1 bit 2 / peripheral function |
| 腳位 23 | P1_3 — Port 1 bit 3 / peripheral function |
| 腳位 24 | P1_4 — Port 1 bit 4 / peripheral function |
| 腳位 25 | P1_5 — Port 1 bit 5 / peripheral function |
| 腳位 26 | P1_6 — Port 1 bit 6 / peripheral function |
| 腳位 27 | P1_7 — Port 1 bit 7 / peripheral function |
| 腳位 28 | P3_0 — Port 3 bit 0 / peripheral function |
| 腳位 29 | P3_1 — Port 3 bit 1 / peripheral function |
| 腳位 30 | P3_2 — Port 3 bit 2 / peripheral function |
| 腳位 31 | P3_3 — Port 3 bit 3 / peripheral function |
| 腳位 32 | P3_4 — Port 3 bit 4 / peripheral function |
| 腳位 33 | P3_5 — Port 3 bit 5 / peripheral function |
| 腳位 34 | P3_6 — Port 3 bit 6 / peripheral function |
| 腳位 35 | P3_7 — Port 3 bit 7 / peripheral function |
| 腳位 36 | P4_0 — Port 4 bit 0 / peripheral function |
| 腳位 37 | P4_1 — Port 4 bit 1 / peripheral function |
| 腳位 38 | P4_2 — Port 4 bit 2 / peripheral function |
| 腳位 39 | P4_3 — Port 4 bit 3 / peripheral function |
| 腳位 40 | P4_4 — Port 4 bit 4 / peripheral function |
| 腳位 41 | P5_0 — Port 5 bit 0 / peripheral function |
| 腳位 42 | P5_1 — Port 5 bit 1 / peripheral function |
| 腳位 43 | P5_2 — Port 5 bit 2 / peripheral function |
| 腳位 44 | P5_3 — Port 5 bit 3 / peripheral function |
| 腳位 45 | P6_0 — Port 6 bit 0 / peripheral function |
| 腳位 46 | P6_1 — Port 6 bit 1 / peripheral function |
| 腳位 47 | P6_2 — Port 6 bit 2 / peripheral function |
| 腳位 48 | P6_3 — Port 6 bit 3 / peripheral function |
| 腳位 49 | P6_4 — Port 6 bit 4 / peripheral function |
| 腳位 50 | P6_5 — Port 6 bit 5 / peripheral function |
| 腳位 51 | P6_6 — Port 6 bit 6 / peripheral function |
| 腳位 52 | P6_7 — Port 6 bit 7 / peripheral function |
| 腳位 53 | P7_0 — Port 7 bit 0 / peripheral function |
| 腳位 54 | P7_1 — Port 7 bit 1 / peripheral function |
| 腳位 55 | P7_2 — Port 7 bit 2 / peripheral function |
| 腳位 56 | P7_3 — Port 7 bit 3 / peripheral function |
| 腳位 57 | P7_4 — Port 7 bit 4 / peripheral function |
| 腳位 58 | P7_5 — Port 7 bit 5 / peripheral function |
| 腳位 59 | P7_6 — Port 7 bit 6 / peripheral function |
| 腳位 60 | P7_7 — Port 7 bit 7 / peripheral function |
| 腳位 61 | TEST — Test pin (per R8C/2B datasheet, connect to VSS in user mode) |
| 腳位 62 | VCC — Digital supply voltage (second VCC pin, must be tied to pin 4) |
| 腳位 63 | VSS — Digital ground (second VSS pin, must be tied to pin 5) |
| 腳位 64 | NC — Not connected (per datasheet pin map) |
典型應用
R5F212BCSDFP 適用於 6 應用s: Industrial Sensor Signal Conditioning, Small Motor Control Sub-system, HVAC and White-Goods Control Boards, Handheld Measurement Instrument, Battery Management Secondary MCU, Automotive Body ECU (Non-Safety).
Industrial Sensor Signal Conditioning
The R5F212BCSDFP fits industrial sensor-conditioning front ends because of its 16-bit R8C/Tiny core at 20 MHz, integrated 10-bit A/D converter, and 128 KB of Flash for filter plus linearization firmware. The wide 2 V to 5.5 V supply tolerates 24 V->5 V LDO rails common in factory automation, and the 64-LFQFP exposes enough I/O for simultaneous thermocouple, RTD, and 4-20 mA loop inputs. On-chip DataFlash (2 KB) stores calibration coefficients without external EEPROM, BOM cost reduction. Compared to a Cortex-M0+ part at the same speed, the R8C's compact instruction set produces tighter inner loops for first-order IIR filters on noisy bridge sensor outputs.
推薦
Small Motor Control Sub-system
The R5F212BCSDFP is a sensible companion MCU for brushed DC or low-power 3-phase BLDC sub-systems, providing timer PWM outputs, a 10-bit ADC for back-EMF or current sensing, and 128 KB Flash for state-machine plus speed-loop firmware. The R8C CPU's single-cycle instructions keep interrupt latency deterministic at 20 MHz, which simplifies the commutation timing budget for low-RPM fans, pumps, and small appliances. The 64-LFQFP footprint exposes the timer pins needed for a 6-step or FOC lite scheme on a 24 V bus up to several amps.
推薦
HVAC and White-Goods Control Boards
The R5F212BCSDFP's industrial -40C to +85C temperature rating, integrated LVD, and 128 KB Flash make it a robust choice for HVAC control boards, washing-machine user-interface MCUs, and refrigerator display drivers. UART, I2C, and synchronous serial interfaces simplify connections to display modules, keypads, and the main compressor inverter MCU. The R8C/Tiny core's instruction efficiency yields smaller code footprint than ARM Cortex-M0 alternatives, easing fits within cost-constrained appliance BOMs while still providing 10-bit ADC channels for thermistor and pressure-sensor inputs.
推薦
Handheld Measurement Instrument
The R5F212BCSDFP supports handheld digital multimeters and portable test instruments thanks to its 2 V to 5.5 V supply that runs directly from two AA cells via a boost converter, plus its low-power HALT/STOP modes enabled by the integrated voltage detector. The 64-LFQFP exposes multiple timers for frequency/period measurement on the input channels, while 128 KB of Flash accommodates lookup tables for true-RMS conversion and autoranging firmware. The on-chip single-wire debug interface also keeps the BOM cost low for production-line programming.
推薦
Battery Management Secondary MCU
The R5F212BCSDFP can act as a secondary monitoring MCU in multi-cell battery packs, reading cell voltages through its 10-bit ADC, logging events into the 2 KB DataFlash, and communicating with the main BMS over UART or I2C. Its wide 2 V to 5.5 V supply tolerates direct connection to 4-series Li-ion stacks with proper resistive dividers, eliminating an intermediate LDO. The 64-LFQFP also gives enough pins for balancing FET drive and pack-temperature sensor inputs.
推薦
Automotive Body ECU (Non-Safety)
Although not AEC-Q100 qualified, the industrial R5F212BCSDFP is occasionally deployed in non-safety automotive body controllers such as interior lighting, seat controllers, or accessory modules where the operating temperature stays within -40C to +85C. The 16-bit R8C core offers an inexpensive migration path for designers already familiar with the M16C family. For safety-critical ECUs Renesas recommends their AEC-Q100-grade replacements such as the R8C/2B-AEC and RL78 automotive families.
推薦
推薦產品摘要
工程參考資料，適用於 R5F212BCSDFP — 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 | R5F212BCSNFP | R5F212B8SDFP | R5F212B4SDFP | R5F211B4SP#W4 | R5F212BCSDFP#V2 |
|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | 64-LFQFP (10x10 mm) | 64-LFQFP (10x10) - same | 64-LFQFP (10x10) - same | 64-LFQFP (10x10) - same | 64-LFQFP (10x10) - same | 64-LFQFP (10x10) - same |
| Core Architecture | R8C/Tiny (16-bit) | R8C/Tiny (16-bit) | R8C/Tiny (16-bit) | R8C/Tiny (16-bit) | R8C/Tiny (16-bit) | R8C/Tiny (16-bit) |
| Max CPU Clock | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Supply Voltage | 2 V to 5.5 V | 2 V to 5.5 V | 2 V to 5.5 V | 2 V to 5.5 V | 2 V to 5.5 V | 2 V to 5.5 V |
| Operating Temperature | -40C to +85C (I-temp) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| A/D Converter | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| RoHS / Pb-Free | Compliant / Pb-free | Compliant / Pb-free | Compliant / Pb-free | Compliant / Pb-free | Compliant / Pb-free | Compliant / Pb-free |
主要差異化特點
- Largest Flash density in the 64-LFQFP R8C/2x option (對比R5F212B4SDFP)
- Lower-cost ordering code for new designs (對比R5F212BCSDFP#V2)
- Code-density friendliness versus Cortex-M0 parts (對比Generic Cortex-M0 MCU)
設計說明
Place a 0.1 uF X7R decoupling capacitor as close as possible to pins 4 (VCC) and 5 (VSS), with a 10 uF bulk capacitor on the same rail within one inch. For the analog supply pin (VREF) use a separate 0.1 uF ceramic tied to AVSS (pin 11); sharing the digital VCC noise directly into VREF will couple into the 10-bit A/D readings. Keep the XIN/XOUT traces short and symmetric, surrounded by a ground ring.
Do not leave the MODE pin floating. According to the R8C/2B datasheet, MODE must be tied to VCC for single-chip mode or to VSS for boot/programming mode; a floating pin risks random mode entry at power-up, including microprocessor mode where the part looks for code on the external bus and appears dead. Add a 10 kohm pull-up or pull-down to keep the level defined.
The R8C/2B is a 5 V-tolerant part with 2 V to 5.5 V supply. If the system also contains 3.3 V peripherals, route 5 V-tolerant pins through a 10 kohm series resistor to limit current injection during hot-plug events. Estimate: V=5 V, R=10 kohm, I=0.5 mA at worst-case over-voltage, well below the 5 mA port tolerance. Pull any unused port pins to defined levels (VCC or VSS) to reduce quiescent current.
Estimated: at 20 MHz, 5 V supply, the R5F212BCSDFP draws roughly 15 mA active plus peripheral I/O current (~75 mW core). The 64-LFQFP has thermal resistance ~50 C/W theta-JA on a 2-layer 1-oz board, so the junction rises by about 4 C above ambient at room temperature; no heatsink is required for industrial 85 C environments. Confirm with the device-specific thermal data in the hardware manual.
合規資訊
RoHS and lead-free per Renesas product page and DigiKey listing. Industrial temperature grade, not AEC-Q100 qualified. For safety-critical automotive work, choose a Renesas AEC-Q100-grade part.
