EFM8BB51F16G-C-QFN20R Xinke | QFN20 package microcontroller drone chip

Silicon Labs EFM8 Busy Bee series, high-performance 8-bit CIP-51 (pipelined 8051) MCU, QFN20 small package, tape version R=Tape&Reel, mass production

 ✅ Model disassembly

EFM8BB51: Busy Bee BB51 sub-series

F16G：16KB Flash

C: Temperature version -40~+85℃

QFN20: Package 3mm × 3mm QFN20, with exposed solder pads

Suffix R: Tape packaging, SMT mass production

 ✅ Core performance parameters

1. Core: CIP-51 pipeline 8051, with a maximum frequency of 50MHz, 70% of instructions are executed in 1~2 clock cycles, which is much faster than traditional 8051 storage

 Flash：16KB

 RAM：1.25KB（1.28KB）

3. Power Supply: Wide voltage range of 1.8V ~ 5.5V, with I/O supporting a 5V voltage tolerance, making it highly suitable for 5V analog peripherals (such as INA139)

4. Analog peripherals

 1×12bit SAR ADC, with up to 16 channels and a maximum speed of 612ksps

 2-channel analog comparator

 Built-in on-chip temperature sensor

5. Timer and PWM

 4 16-bit timers, 2 8-bit timers

 3-channel PCA PWM + independent 3-channel PWM engine, supporting complementary output + dead time DTI (suitable for BLDC / small motor control)

 4 configurable logic units (CLUs)

6. Communication interface

 2×UART (up to 3M baud rate)

 SPI (up to 12Mbps, with 4-byte FIFO)

 SMBus/I2C (up to 400kHz)

7. System peripherals: POR (Power-on Reset), BOR (Brown-out Reset), independent watchdog WDT, multiple sets of on-chip high-speed/low-speed oscillators, capable of operating without an external crystal oscillator

8. IO: 16-channel multi-function GPIO, supporting pin crossbar switch (peripherals can be arbitrarily mapped to pins, providing very flexible wiring)

9. Temperature range: -40℃ ~ +85℃

 ✅ Typical application scenarios

Positioning: A low-cost, small-sized 8-bit auxiliary MCU that can serve as a coprocessor for your previous STM32H7/H5, specifically for analog sampling, PWM driving, and IO expansion.

LED lighting, RGB lighting control

 Small household appliances, power tools, personal care products

Simple drive for low-power BLDC/DC motors (fans, water pumps)

Battery management, battery pack monitoring (paired with INA139 current sampling)

Industrial sensors, IO acquisition modules

Consumer electronics buttons, touch, signal acquisition, auxiliary control

 Power board auxiliary control, secondary power management

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For technical and business inquiries, please contact Mr. Zhang at 13430464310