SILICON LABS EFM8BB21F16G-C-QFN20R

The EFM8BB2, part of the Busy Bee family of MCUs, is a multipurpose line of 8-bit microcontrollers with a comprehensive feature set in small packages. These devices offer high-value by integrating advanced analog and enhanced highspeed communication peripherals into small packages, making them ideal for space-constrained applications. With an efficient 8051 core, enhanced pulse-width modulation, and precision analog, the EFM8BB2 family is also optimal for embedded applications.

• Pipelined 8-bit C8051 core with 50 MHz maximum operating frequency
• Up to 22 multifunction, 5 V tolerant I/O pins
• One 12-bit Analog to Digital converter (ADC)
• Two Low-current analog comparators with build-in DAC as reference input
• Integrated temperature sensor
• 3-channel PWM / PCA with special hardware kill/safe state capability
• Five 16-bit timers
• Two UARTs, SPI, SMBus/I2C master/slave and I2C slave
• Priority crossbar for flexible pin mapping
• Pipelined CIP-51 Core
• Fully compatible with standard 8051 instruction set
• 70% of instructions execute in 1-2 clock cycles
• 50 MHz maximum operating frequency
• Up to 16 KB flash memory, in-system re-programmable from firmware, including 1 KB of 64-byte sectors and 15 KB of 512-byte sectors
• Up to 2304 bytes RAM (including 256 bytes standard 8051 RAM and 2048 bytes on-chip XRAM)
• 5 V-input LDO regulator
• Internal LDO regulator for CPU core voltage
• Power-on reset circuit and brownout detectors
• All pins 5 V tolerant under bias
• Flexible peripheral crossbar for peripheral routing
• 5 mA source, 12.5 mA sink allows direct drive of LEDs
• Internal 49 MHz oscillator with accuracy of ±1.5%
• Internal 24.5 MHz oscillator with ±2% accuracy
• Internal 80 kHz low-frequency oscillator
• External CMOS clock option
• 3-channel Programmable Counter Array (PCA) supporting PWM, capture/compare, and frequency output modes
• 5×16-bit general-purpose timers
• Independent watchdog timer, clocked from the low frequency oscillator
• 2× UART, up to 3 Mbaud
• SPI Master / Slave, up to 12 Mbps
• SMBus/I2C Master / Slave, up to 400 kbps
• I2C High-Speed Slave, up to 3.4 Mbps
• 16-bit CRC unit, supporting automatic CRC of flash at 256-byte boundaries
• 12-Bit Analog-to-Digital Converter (ADC)
• 2× Low-current analog comparators with adjustable reference
• On-Chip, Non-Intrusive Debugging
• Full memory and register inspection
• Four hardware breakpoints, single-stepping
• Pre-loaded UART bootloader
• Temperature range -40 to 85 °C or -40 to 125 °C
• Single power supply of 2.2 to 3.6 V or 3.0 to 5.25 V
• QFN28, QSOP24, and QFN20 packages

• Motor control
• Consumer electronics
• Sensor controllers
• Medical equipment
• Lighting systems
• High-speed communication hub