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Part Name(s) : EFM8UB2 EFM8UB20F32G EFM8UB20F64G EFM8UB20F32G-A-QFN32 EFM8UB20F32G-A-QFN32R EFM8UB20F32G-A-QFP32 EFM8UB20F32G-A-QFP32R EFM8UB20F32G-A-QFP48 EFM8UB20F32G-A-QFP48R EFM8UB20F64G-A-QFN32 EFM8UB20F64G-A-QFN32R EFM8UB20F64G-A-QFP32 EFM8UB20F64G-A-QFP32R EFM8UB20F64G-A-QFP48 EFM8UB20F64G-A-QFP48R Silabs
Silicon Laboratories
Description : The EFM8UB2, part of the Universal Bee family of MCUs, is a multi-purpose line of 8-bit microcontrollers with USB feature set. View

EFM8 Universal Bee Family
EFM8UB2 Data Sheet

Feature List
The EFM8UB2 highlighted features are listed below.
• 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 ºC
• Single power supply 2.65 to 3.6 V
QFP48, QFP32, and QFN32 packages

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