SILICON LABS EFM8UB20F32G-B-QFN32

The EFM8UB2, part of the Universal Bee family of MCUs, is a multi-purpose line of 8-bit microcontrollers with USB feature set. These devices offer high value by integrating a USB peripheral interface with a high precision oscillator, clock recovery circuit, and integrated transceiver, making them ideal for any full speed USB applications with no external components required. With an efficient 8051 core and precision analog, the EFM8UB2 family is also optimal for embedded applications.

• Pipelined 8-bit 8051 MCU Core with 48 MHz maximum operating frequency
• Up to 40 multifunction I/O pins
• Crystal-less full speed/low speed USB 2.0 compliant controller with 1 KB buffer memory
• One differential 10-bit ADC and two analog comparators
• Internal 48 MHz oscillator with ±0.25% accuracy with USB clock recovery supports crystal-free USB and UART operation
• 2 UARTs, SPI, 2 SMBus/I2C serial communications
• Core: Pipelined CIP-51 Core, Fully compatible with standard 8051 instruction set, 70% of instructions execute in 1 - 2 clock cycles, 48 MHz maximum operating frequency
• Memory: Up to 64 KB flash memory, in-system re-programmable from firmware; Up to 4352 bytes RAM (including 256 bytes standard 8051 RAM and 4096 bytes on-chip XRAM)
• Power: Internal LDO regulator for CPU core voltage, Internal 5-to-3.3 V LDO allows direct connection to USB supply net, Power-on reset circuit and brownout detectors
• I/O: Up to 40 total multifunction I/O pins, Flexible peripheral crossbar for peripheral routing, 10 mA source, 25 mA sink allows direct drive of LEDs
• Clock Sources: Internal 48 MHz precision oscillator (±1.5% accuracy without USB clock recovery, ±0.25% accuracy with USB clock recovery), Internal 80 kHz low-frequency oscillator, External crystal, RC, C, and CMOS clock options
• Timers/Counters and PWM: 5-channel Programmable Counter Array (PCA) supporting PWM, capture/compare, and frequency output modes with watchdog timer function, 6 x 16-bit general-purpose timers
• Communications and Digital Peripherals: Universal Serial Bus (USB) Function Controller with eight flexible endpoint pipes, integrated transceiver, and 1 KB FIFO RAM, 2 x UART, SPI Master / Slave, 2 x SMBus/I2C Master / Slave, External Memory Interface (EMIF)
• Analog: 10-Bit Analog-to-Digital Converter (ADC0), 2 x Low-current analog comparators
• On-Chip, Non-Intrusive Debugging: Full memory and register inspection, Four hardware breakpoints, single-stepping
• Pre-loaded USB bootloader
• Temperature range -40 to 85 ℃
• Single power supply 2.65 to 3.6 V
• QFP48, QFP32, and QFN32 packages

• USB I/O controls, dongles
• Consumer electronics
• High-speed communication bridge
• Medical equipment