SILICON LABS EFM8BB31F32I-B-5QFN32

The EFM8BB3, part of the Busy Bee family of MCUs, is a performance line of 8-bit microcontrollers with a comprehensive analog and digital feature set in small packages. These devices offer state-of-the-art performance by integrating 12-bit ADC, internal temperature sensor, and up to four 12-bit DACs into small packages, making them ideal for general purpose applications. With an efficient, pipelined 8051 core with maximum operating frequency at 50 MHz, various communication interfaces, and four channels of configurable logic, the EFM8BB3 family is optimal for many embedded applications.

• Pipelined 8-bit 8051 MCU Core with 50 MHz operating frequency
• Up to 29 multifunction I/O pins
• One 12-bit/10-bit ADC
• Four 12-bit DACs with synchronization and PWM capabilities
• Two low-current analog comparators with built-in reference DACs
• Internal temperature sensor
• Internal 49 MHz and 24.5 MHz oscillators accurate to ±2%
• Four channels of Configurable Logic
• 6-channel PWM / PCA
• Six 16-bit general-purpose timers
• 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 64 kB flash memory [63 kB user-accessible], in-system re-programmable from firmware in 512-byte sectors
• Up to 4352 bytes RAM (including 256 bytes standard 8051 RAM and 4096 bytes on-chip XRAM)
• Internal LDO regulator for CPU core voltage
• Power-on reset circuit and brownout detectors
• Up to 25 pins 5V tolerant under bias
• Selectable state retention through reset events
• 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 ±2%
• Internal 24.5 MHz oscillator with ±2% accuracy
• Internal 80 kHz low-frequency oscillator
• External CMOS clock option (up to 50 MHz)
• External RC Oscillator (up to 3.2 MHz)
• 2 x 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
• 4 Configurable Logic Units
• 6-channel programmable counter array (PCA) supporting PWM, capture/compare, and frequency output modes
• 6 x 16-bit general-purpose timers
• Independent watchdog timer, clocked from the low frequency oscillator
• On-Chip, Non-Intrusive Debugging
• Full memory and register inspection
• Four hardware breakpoints, single-stepping
• Pre-programmed UART bootloader
• Temperature range -40 to 85 ℃ or -40 to 125 ℃
• Available in commercial, industrial, and automotive variants
• CIP-51 Core running up to 49 MHz
• Three Internal Oscillators (49 MHz, 24.5 MHz and 80 kHz)
• SMBus
• I2C Slave
• SPI
• 2 UARTs
• 6-Channel Programmable Counter Array (PWM, Clock Generation, Capture/Compare)
• Six 16-bit Timers
• Four Configurable Logic Units
• 12-bit Analog-to-Digital Converter with integrated multiplexer, voltage reference, temperature sensor, channel sequencer, and directto-XRAM data transfer
• Two Analog Comparators
• 16-bit CRC Unit
• AEC-Q100 qualified
• Pre-loaded UART bootloader

• Consumer electronics
• Industrial control and automation
• Precision instrumentation
• Smart sensors
• Power management and control
• Automotive control