EFM8UB1 Datasheet, PDF (1/59 Pages) Silicon Laboratories – The EFM8UB1 highlighted features are listed below

EFM8 Universal Bee Family
EFM8UB1 Data Sheet
The EFM8UB1, part of the Universal Bee family of MCUs, is a
multi-purpose line of 8-bit microcontrollers with USB feature set in
small packages.
These devices offer high value by integrating an innovative energy-smart USB peripheral
interface, charger detect circuit, 8 kV ESD protection, and enhanced high speed commu-
nication interfaces into small packages, making them ideal for space-constrained USB
applications. With an efficient 8051 core and precision analog, the EFM8UB1 family is
also optimal for embedded applications.
EFM8UB1 applications include the following:
• USB I/O controls, dongles
• High-speed communication bridge
• Consumer electronics
• Medical equipment
KEY FEATURES
• Pipelined 8-bit C8051 core with 50 MHz
maximum operating frequency
• Up to 22 multifunction, 5 V tolerant I/O pins
• Low Energy USB with full- and low-speed
support saves up to 90% of the USB
energy
• USB charger detect circuit (USB-BCS 1.2
compliant)
• One 12-bit ADC and two analog
comparators with internal voltage DAC as
reference input
• Five 16-bit timers
• Two UARTs, SPI, SMBus/I2C master/slave
and I2C slave
• Priority crossbar for flexible pin mapping
Core / Memory
CIP-51 8051 Core
(50 MHz)
Clock Management
External CMOS
Oscillator
High Frequency
48 MHz RC
Oscillator
Energy Management
Internal LDO
Regulator
Power-On Reset
Flash Program
Memory
(up to 16 KB)
RAM Memory
(2304 bytes)
Debug Interface
with C2
Low Frequency
RC Oscillator
High Frequency
24.5 MHz RC
Oscillator
Brown-Out
Detector
5 V-to 3.3 V LDO
Regulator
Serial Interfaces
2 x UART
SPI
I²C / SMBus
USB
High-Speed I2C Slave
I/O Ports
External
Interrupts
Pin Reset
General
Purpose I/O
Pin Wakeup
8-bit SFR bus
Timers and Triggers
Timer
0/1/2
PCA/PWM
Watchdog
Timer
Timer 3/4
Lowest power mode with peripheral operational:
Normal
Idle
Suspend
Snooze
Shutdown
Analog Interfaces
ADC
Comparator 0
Comparator 1
Internal
Voltage
Reference
Security
16-bit CRC
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