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EFM8BB31F16G-D-QFN24

SiLEFM8BB31F16G-D-QFN24

Silicon Labs
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
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Overview

The EFM8BB31F16G-D-QFN24 is a high-performance 8-bit microcontroller from Silicon Labs based on the CIP-51 8051 core, operating at up to 50MHz. This 'Busy Bee' series MCU integrates 16KB of Flash and 2.25KB of RAM within a compact 3x3 mm QFN24 package. It is designed for versatile general-purpose applications, featuring 5V tolerant I/Os and a sophisticated peripheral set including Configurable Logic Units (CLU) and a DMA controller.

Why Choose This Part

This MCU offers a high clock-to-performance ratio with its 50MHz 8051 core and includes advanced digital features like a DMA controller and CRC engine rarely found in small 8-bit devices. Its 5V tolerant I/Os and high output drive current of 12.5mA simplify interfacing with various logic levels and driving LEDs or small transistors directly.

Applications

Sensor Interface
Utilizing the internal temperature sensor and high-speed I/O for processing analog and digital sensor data.
Motor Control Logic
Leveraging the 50MHz core speed and PWM peripherals for brushless or brushed DC motor commutation logic.
Communication Bridges
Acting as a protocol converter between I2C, SPI, and UART interfaces in complex embedded systems.
System Supervisors
Monitoring power rails and system health using the integrated brown-out detector and power-on reset circuits.

Key Specifications

Speed 50MHz
RAM Size 2.25K x 8
Core Size 8-Bit
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Connectivity I2C, SMBus, SPI, UART/USART
Mounting Type Surface Mount
Number of I/O 20
Core Processor CIP-51 8051
Package / Case 24-VFQFN Exposed Pad
Data Converters A/D 12x12b; D/A 2x12b
Oscillator Type Internal
Program Memory Size 16KB (16K x 8)
Program Memory Type FLASH
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 24-QFN (3x3)
Voltage - Supply (Vcc/Vdd) 2.2V ~ 3.6V

Getting Started

To begin development, use the Silicon Labs Simplicity Studio IDE which provides a full toolchain and configuration wizards for the Busy Bee peripherals. Hardware evaluation is best performed using the EFM8BB31 Start Kit (STK), which includes an on-board Segger J-Link debugger and access to all 20 I/O pins.

Categories

Microcontrollers > 8051