EFM8 Sleepy Bee Family EFM8SB1 Data Sheet The EFM8SB1, part of the Sleepy Bee family of MCUs, is the ENERGY FRIENDLY FEATURES worlds most energy friendly 8-bit microcontrollers with a compre- hensive feature set in small packages. Lowest MCU sleep current with supply brownout (50 nA) These devices offer lowest power consumption by combining innovative low energy tech- Lowest MCU active current (150 A / MHz niques and short wakeup times from energy saving modes into small packages, making at 24.5 MHz) them well-suited for any battery operated applications. With an efficient 8051 core, 14 Lowest MCU wake on touch average high-quality capacitive sense channels, and precision analog, the EFM8SB1 family is al- current (< 1 A) so optimal for embedded applications. Lowest sleep current using internal RTC and supply brownout (< 300 nA) EFM8SB1 applications include the following: Ultra-fast wake up for digital and analog Instrumentation panels Touch pads / key pads peripherals (< 2 s) Battery-operated consumer electronics Wearables Integrated LDO to maintain ultra-low active current at all voltages Core / Memory Clock Management Energy Management External Low Power 20 MHz CIP-51 8051 Core Internal LDO RC Oscillator Oscillator Power-On Reset Regulator (25 MHz) High Frequency Low Frequency 24.5 MHz RC RC Oscillator Oscillator Flash Program RAM Memory Debug Interface Memory Brown-Out Detector (up to 512 bytes) with C2 External 32 kHz RTC Oscillator (up to 8 KB) 8-bit SFR bus Serial Interfaces I/O Ports Timers and Triggers Analog Interfaces Security ADC Comparator 0 16-bit CRC External Timers UART SPI Pin Reset PCA/PWM Interrupts 0/1/2/3 Internal Current Internal Voltage Reference Reference General Watchdog Real Time 2 I C / SMBus Pin Wakeup Purpose I/O Timer Clock Capacitive Sense Lowest power mode with peripheral operational: Normal Idle Suspend Sleep silabs.com Building a more connected world. Rev. 1.4EFM8SB1 Data Sheet Feature List 1. Feature List The EFM8SB1 highlighted features are listed below. Core: Timers/Counters and PWM: Pipelined CIP-51 Core 32-bit Real Time Clock (RTC) Fully compatible with standard 8051 instruction set 3-channel Programmable Counter Array (PCA) supporting 70% of instructions execute in 1-2 clock cycles PWM, capture/compare, and frequency output modes with watchdog timer function 25 MHz maximum operating frequency 4 x 16-bit general-purpose timers Memory: Communications and Digital Peripherals: Up to 8 kB flash memory, in-system re-programmable from firmware. UART Up to 512 bytes RAM (including 256 bytes standard 8051 SPI Master / Slave RAM and 256 bytes on-chip XRAM) SMBus / I2C Master / Slave Power: 16-bit CRC unit, supporting automatic CRC of flash at 256- Internal LDO regulator for CPU core voltage byte boundaries Power-on reset circuit and brownout detectors Analog: I/O: Up to 17 total multifunction I/O pins: Capacitive Sense (CS0) Flexible peripheral crossbar for peripheral routing Programmable current reference (IREF0) 5 mA source, 12.5 mA sink allows direct drive of LEDs 12-Bit Analog-to-Digital Converter (ADC0) Clock Sources: 1 x Low-current analog comparator Internal 20 MHz low power oscillator with 10% accuracy On-Chip, Non-Intrusive Debugging Internal 24.5 MHz precision oscillator with 2% accuracy Full memory and register inspection Internal 16.4 kHz low-frequency oscillator or RTC 32 kHz Four hardware breakpoints, single-stepping crystal (RTC crystal not available on CSP16 packages) Pre-loaded UART bootloader External crystal, RC, C, and CMOS clock options Temperature range -40 to 85 C Single power supply 1.8 to 3.6 V QSOP24, QFN24, QFN20, and CSP16 packages With on-chip power-on reset, voltage supply monitor, watchdog timer, and clock oscillator, the EFM8SB1 devices are truly standalone system-on-a-chip solutions. The flash memory is reprogrammable in-circuit, providing non-volatile 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. Each device is specified for 1.8 to 3.6 V operation. Devices are AEC-Q100 qualified (Grade 3) and are available in 16- pin CSP, 20-pin QFN, 24-pin QFN, or 24-pin QSOP packages. All package options are lead-free and RoHS compliant. Note: CSP devices can be handled and soldered using industry standard surface mount assembly techniques. However, because CSP devices are essentially a piece of silicon and are not encapsulated in plastic, they are susceptible to mechanical damage and may be sensitive to light. When CSP packages must be used in an environment exposed to light, it may be necessary to cover the top and sides with an opaque material. silabs.com Building a more connected world. Rev. 1.4 1