EFM8UB2 Datasheet, PDF (1/50 Pages) Silicon Laboratories – The EFM8UB2 highlighted features are listed below

EFM8 Universal Bee Family
EFM8UB2 Data Sheet
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 pre-
cision 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 ap-
plications.
EFM8UB2 applications include the following:
• USB I/O controls, dongles
• High-speed communication bridge
• Consumer electronics
• Medical equipment
KEY FEATURES
• 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 / Memory
CIP-51 8051 Core
(48 MHz)
Flash Program
Memory
(up to 64 KB)
RAM Memory
(up to 4352 bytes)
Debug Interface
with C2
Serial Interfaces
2 x UART
SPI
2 x I²C /
SMBus
USB
I/O Ports
External
Interrupts
Pin Reset
General Purpose I/O
Lowest power mode with peripheral operational:
Normal
Idle
Suspend
Shutdown
Clock Management
External
Oscillator
High Frequency
48 MHz RC
Oscillator
Energy Management
Internal LDO
Regulator
Power-On Reset
Low Frequency
RC Oscillator
Brown-Out
Detector
5 V-to 3.3 V LDO
Regulator
8-bit SFR bus
Timers and Triggers
6 x Timers PCA/PWM
Watchdog Timer
Analog Interfaces
ADC
Comparator 0
Comparator 1
Internal
Voltage
Reference
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Rev. 1.2