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EFM8 Busy Bee Family
EFM8BB1 Reference Manual
The EFM8BB1, part of the Busy Bee family of MCUs, is a multi-
purpose line of 8-bit microcontrollers with a comprehensive feature
set in small packages.
These devices offer high-value by integrating advanced analog and communication pe-
ripherals into small packages, making them ideal for space-constrained applications.
With an efficient 8051 core, enhanced pulse-width modulation, and precision analog, the
EFM8BB1 family is also optimal for embedded applications.
EFM8BB1 applications include the following:
KEY FEATURES
• Pipelined 8-bit C8051 core with 25 MHz
maximum operating frequency
• Up to 18 multifunction, 5 V tolerant I/O pins
• One 12-bit Analog to Digital converter
(ADC)
• Two low-current analog comparators
• Integrated temperature sensor
• 3-channel enhanced PWM / PCA
• Four 16-bit timers
• UART, SPI and SMBus/I2C
• Priority crossbar for flexible pin mapping
• Motor control
• Consumer electronics
• Sensor controllers
• Medical equipment
• Lighting systems
• I/O port expander
SecurityI/O Ports
Core / Memory Clock Management
Low Frequency
RC Oscillator
Energy Management
Brown-Out Detector
8-bit SFR bus
Serial Interfaces Timers and Triggers Analog Interfaces
UART SPI
I
2
C / SMBus
External
Interrupts
General Purpose I/O
Pin Reset
16-bit
Timers
PCA/PWM
Watchdog Timer
ADC
Analog
Comparators
Internal Voltage Reference
16-bit CRC
Flash Program
Memory
(up to 8 KB)
RAM Memory
(up to 512 bytes)
Lowest power mode with peripheral operational:
IdleNormal Shutdown
CIP-51 8051 Core
(25 MHz)
Debug Interface
with C2
External CMOS
Oscillator
High Frequency
RC Oscillator
Internal LDO
Regulator
Power-On Reset
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