EFM8 Busy Bee Family EFM8BB3 Data Sheet The EFM8BB3, part of the Busy Bee family of MCUs, is a per- KEY FEATURES formance line of 8-bit microcontrollers with a comprehensive ana- log and digital feature set in small packages. Pipelined 8-bit 8051 MCU Core with 50 MHz operating frequency These devices offer state-of-the-art performance by integrating 12-bit ADC, internal Up to 29 multifunction I/O pins temperature sensor, and up to four 12-bit DACs into small packages, making them ide- One 12-bit/10-bit ADC al for general purpose applications. With an efficient, pipelined 8051 core with maxi- mum operating frequency at 50 MHz, various communication interfaces, and four chan- Four 12-bit DACs with synchronization and PWM capabilities nels of configurable logic, the EFM8BB3 family is optimal for many embedded applica- tions. Two low-current analog comparators with built-in reference DACs Internal temperature sensor EFM8BB3 applications include the following: Internal 49 MHz and 24.5 MHz oscillators accurate to 2% Consumer electronics Industrial control and automation Four channels of Configurable Logic Precision instrumentation Smart sensors 6-channel PWM / PCA Power management and control Six 16-bit general-purpose timers Core / Memory Clock Management Energy Management High Frequency CIP-51 8051 Core External Internal LDO 49 MHz RC Power-On Reset Oscillator Regulator (50 MHz) Oscillator Flash Program High Frequency RAM Memory Debug Interface Low Frequency Memory 24.5 MHz RC Brown-Out Detector (up to 4352 bytes) with C2 RC Oscillator (up to 64 KB) Oscillator 8-bit SFR bus Serial Interfaces I/O Ports Timers and Triggers Analog Interfaces Security Timers PCA/PWM 16-bit CRC External 2 x 0/1/2/5 2 x UART SPI Pin Reset ADC Comparators Interrupts Watchdog Timer 3/4 Timer Internal High-Speed General Up to 4 x 2 I C / SMBus Pin Wakeup Voltage Purpose I/O Voltage DAC I2C Slave 4 x Configurable Logic Units Reference Lowest power mode with peripheral operational: Normal Idle Suspend Snooze Shutdown silabs.com Building a more connected world. Rev. 1.1Table of Contents 1. Feature List................................1 2. Ordering Information ............................2 3. System Overview..............................4 3.1 Introduction...............................4 3.2 Power ................................5 3.3 I/O..................................5 3.4 Clocking................................6 3.5 Counters/Timers and PWM .........................6 3.6 Communications and Other Digital Peripherals...................7 3.7 Analog ................................10 3.8 Reset Sources .............................11 3.9 Debugging...............................11 3.10 Bootloader ..............................12 4. Electrical Specifications .......................... 14 4.1 Electrical Characteristics ..........................14 4.1.1 Recommended Operating Conditions .....................14 4.1.2 Power Consumption...........................15 4.1.3 Reset and Supply Monitor .........................17 4.1.4 Flash Memory .............................18 4.1.5 Power Management Timing ........................18 4.1.6 Internal Oscillators............................19 4.1.7 External Clock Input...........................19 4.1.8 Crystal Oscillator ............................20 4.1.9 ADC ................................21 4.1.10 Voltage Reference ...........................24 4.1.11 Temperature Sensor ..........................25 4.1.12 1.8 V Internal LDO Voltage Regulator.....................25 4.1.13 DACs ...............................26 4.1.14 Comparators .............................27 4.1.15 Configurable Logic ...........................28 4.1.16 Port I/O...............................29 4.1.17 SMBus ...............................30 4.2 Thermal Conditions............................32 4.3 Absolute Maximum Ratings .........................32 5. Typical Connection Diagrams ........................ 33 5.1 Power ................................33 5.2 Debug ................................34 5.3 Other Connections ............................34 6. Pin Definitions.............................. 35 silabs.com Building a more connected world. Rev. 1.1