Microcontrollers. EFM8UB3 Datasheet

EFM8UB3 Microcontrollers. Datasheet pdf. Equivalent

Part EFM8UB3
Description Microcontrollers
Feature EFM8 Universal Bee Family EFM8UB3 Data Sheet The EFM8UB3, part of the Universal Bee family of MCUs,.
Manufacture Silicon Laboratories
Download EFM8UB3 Datasheet

EFM8 Universal Bee Family
EFM8UB3 Data Sheet
The EFM8UB3, 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 EFM8UB3 family is
also optimal for embedded applications.
EFM8UB3 applications include the following:
• USB I/O controls
• Docking stations/USB hubs
• Dongles
• Consumer electronics
• USB Type-C converters
• USB Type-C billboard/alternate mode
• Pipelined 8-bit C8051 core with 48 MHz
maximum operating frequency
• Up to 17 multifunction I/O pins
• Low Energy USB with full- and low-speed
support saves up to 90% of the USB
• USB charger detect circuit (USB-BCS 1.2
• One 12-bit ADC and two analog
comparators with internal voltage DAC as
reference input
• Six 16-bit timers
• UART and SMBus master/slave
• Priority crossbar for flexible pin mapping
Core / Memory
CIP-51 8051 Core
(48 MHz)
Flash Memory
40 KB
RAM Memory
3328 bytes
Debug Interface
with C2
Clock Management
External CMOS
High Frequency
48 MHz RC
Low Frequency
RC Oscillator
High Frequency
24.5 MHz RC
Energy Management
Internal LDO
Power-On Reset
5 V-to 3.3 V LDO
Serial Interfaces
I/O Ports
Pin Reset
Purpose I/O
Pin Wakeup
8-bit SFR bus
Timers and Triggers
Timer 3/4/5
4 x Configurable Logic Units
Analog Interfaces
Charger Det
Internal Voltage
Comparator 1
Comparator 0
16-bit CRC
Lowest power mode with peripheral operational:
silabs.com | Building a more connected world.
Rev. 1.1

EFM8UB3 Data Sheet
Feature List
1. Feature List
The EFM8UB3 highlighted features are listed below.
High-speed CIP-51 MCU Core
• Pipelined instruction architecture; executes 70% of instruc-
tion set in 1 or 2 system clocks
• Up to 48 MIPS throughput with 48 MHz clock
• Uses standard 8051 instruction set
• Expanded interrupt handler
• 40 KB Flash
• Flash is in-system programmable in 512-byte sectors
• 3328 bytes RAM, including:
• 256 bytes standard 8051 RAM
• 2048 bytes on-chip XRAM
• 1024 bytes of USB buffer
On-chip Debug
• On-chip debug circuitry facilitates full speed, non-intrusive
in-system debug (no emulator required)
• Provides 4 hardware breakpoints, single stepping, inspect/
modify memory and registers
12-bit Analog-to-Digital Converter
• Multiple selectable inputs
• Up to 800 ksps 10-bit mode
• Precise Internal VREF 1.65 V or external VREF supported
Clock Sources
• 48 MHz ± 1.5% precision internal oscillator and ±0.25% us-
ing USB clock recovery
• 24.5 MHz low power internal oscillator with ±2% accuracy
• 80 kHz low-frequency, low power internal oscillator (LFO)
• External CMOS clock option
• Flexible clock divider: Reduce frequency by up to 128x from
any clock source
2 x Analog Comparators
• Multiplexed selectable inputs
• Integrated 6-bit programmable reference voltage selectable
as comparator input channel
• Programmable hysteresis and response time
• 400 nA current consumption in low power mode
Power Management
• 5 V-input LDO regulator for direct connection to USB supply
• External LDO is needed for USB-C VBUS powered ap-
plications that require more than 5 V.
• Internal low dropout (LDO) regulator for CPU core voltage
• Power-on reset and brownout detect circuit
• Multiple power modes supported to minimize power con-
sumption while maintaining performance
General-Purpose I/O
• Up to 17 pins
• VIO + 2.5 V tolerant; push-pull or open-drain
• Priority crossbar to support flexible digital peripheral pin as-
• 6 general purpose 16-bit counters/timers
• 16-bit Programmable Counter Array (PCA) with 3 channels
of PWM, capture/compare, or frequency output capability,
and hardware kill/safe state capability
• Independent watchdog timer, clocked from the low frequen-
cy oscillator
Communication Interfaces and Digital Peripherals
• UART, up to 3 Mbaud
• SMBus (1 Mbps)
• USB 2.0-compliant full speed with integrated low-power
transceiver, 4 bidirectional endpoints and dedicated 1024-
byte buffer
• 16-bit CRC unit, supporting automatic CRC of flash at 256-
byte boundaries
Single Voltage Supply
• (VREGIN shorted to VDD): 2.3 to 3.6 V
• (VREGIN not shorted to VDD): 2.7 to 5.25 V
Pre-loaded USB Bootloader
Package Options: QFN20, QFN24, QSOP24
Temperature Range: -40 to +85 °C
With on-chip power-on reset, voltage supply monitor, watchdog timer, and clock oscillator, the EFM8UB3 devices are truly standalone
system-on-a-chip solutions. The flash memory is reprogrammable in-circuit, providing nonvolatile data storage and allowing field up-
grades of the firmware. The on-chip debugging interface (C2) allows non-intrusive (uses no on-chip resources), full speed, in-circuit
debugging using the production MCU installed in the final application. This debug logic supports inspection and modification of memory
and registers, setting breakpoints, single stepping, and run and halt commands. All analog and digital peripherals are fully functional
while debugging. Devices are available in 20-pin QFN, 24-pin QFN, or 24-pin QSOP packages. All package options are lead-free and
RoHS compliant.
silabs.com | Building a more connected world.
Rev. 1.1 | 2

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