EFM8BB21F16i-C-QFN20R | Silicon Labs | 8-bit microcontroller | Single chip microcontroller

EFM8BB21F16i-C-QFN20R is an 8-bit microcontroller produced by Silicon Labs, belonging to the Busy Bee series, and packaged in a 20 pin QFN.. ‌‌‌

Core architecture: Based on CIP-51 8051 core, 8-bit processor.

Operating speed: maximum frequency of 50MHz.

Storage capacity: 16KB Flash program memory, 2.25KB RAM data memory.

Packaging form: 20-QFN (3x3mm), surface mount type.

Working voltage: 2.2V to 3.6V.

Working temperature: -40 ° C to 125 ° C.

I/O resource: Provides 16 I/O pins

Simulation module: 12 bit ADC, 15 external channels; 2-channel analog comparator; Built in on-chip temperature sensor

Timer/PWM: 5 16 bit universal timers; 3-channel PCA (capable of PWM, with hardware safety shutdown)

Communication interface: 2 × UART; 1×SPI； SMBus/I2C (master-slave)+independent I2C slave

Power supply: Operating voltage 2.2V~3.6V, built-in LDO

Scope of Application

Consumer Electronics: LED Lighting, Small Appliance Controllers, Handheld Devices, Battery Management Boards

Sensor modules: various sensing acquisition boards, temperature/pressure/current transmitters

Industrial control: small actuators, valve control, IO acquisition modules, industrial small drives

Motor: Small DC motor, fan control

Medical equipment: portable medical testing module

Other: USB peripheral auxiliary MCU, power monitoring board, simple human-machine button panel

function and role

1. Analog signal acquisition: 12 bit ADC collects sensor voltage signals (temperature sensing, pressure, current sampling), and the built-in temperature sensor can monitor the temperature of the chip itself

2. PWM output control: 3-channel hardware PWM, can drive LED dimming, small motor, buzzer; Hardware kill security mechanism, automatically shuts down PWM in case of failure

3. Multi protocol serial communication: UART/SPI/I2C/SMBus, communicates with sensors, display screens, power chips, and main MCU

4. Universal IO control: relay, button, indicator light, external device switch control; Flexible pin mapping for I/O (crossbar switch)

5. System security: Watchdogs prevent programs from running away; Power off reset; Hardware CRC checks Flash firmware to ensure program reliability

6. Low power mode: sleep/pause mode, can be awakened through serial port and external IO, suitable for battery powered products

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