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EFM8BB2 데이터시트 PDF




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EFM8BB2 데이터시트, 핀배열, 회로
EFM8 Busy Bee Family
EFM8BB2 Data Sheet
The EFM8BB2, 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 enhanced high-
speed communication peripherals into small packages, making them ideal for space-con-
strained applications. With an efficient 8051 core, enhanced pulse-width modulation, and
precision analog, the EFM8BB2 family is also optimal for embedded applications.
EFM8BB2 applications include the following:
• Motor control
• Consumer electronics
• Sensor controllers
• Medical equipment
• Lighting systems
• High-speed communication hub
KEY FEATURES
• Pipelined 8-bit C8051 core with 50 MHz
maximum operating frequency
• Up to 22 multifunction, 5 V tolerant I/O pins
• One 12-bit Analog to Digital converter
(ADC)
• Two Low-current analog comparators with
build-in DAC as reference input
• Integrated temperature sensor
• 3-channel PWM / PCA with special
hardware kill/safe state capability
• Five 16-bit timers
• Two UARTs, SPI, SMBus/I2C master/slave
and I2C slave
• Priority crossbar for flexible pin mapping
Core / Memory
CIP-51 8051 Core
(50 MHz)
Clock Management
External CMOS
Oscillator
High Frequency
49 MHz RC
Oscillator
Energy Management
Internal LDO
Regulator
Power-On Reset
Flash Program
Memory
(16 KB)
RAM Memory
(2304 bytes)
Debug Interface
with C2
Low Frequency
RC Oscillator
High Frequency
24.5 MHz RC
Oscillator
Brown-Out
Detector
5 V-to 3.3 V LDO
Regulator
Serial Interfaces
2 x UART
SPI
I2C / SMBus
High-Speed
I2C Slave
I/O Ports
External
Interrupts
Pin Reset
General
Purpose I/O
Pin Wakeup
8-bit SFR bus
Timers and Triggers
Timer
0/1/2
PCA/PWM
Watchdog
Timer
Timer 3/4
Lowest power mode with peripheral operational:
Normal
Idle
Suspend
Snooze
Shutdown
Analog Interfaces
ADC
Comparator 0
Comparator 1
Internal
Voltage
Reference
Security
16-bit CRC
silabs.com | Smart. Connected. Energy-friendly.
Rev. 1.1




EFM8BB2 pdf, 반도체, 판매, 대치품
3. System Overview
3.1 Introduction
EFM8BB2 Data Sheet
System Overview
C2CK/RSTb
VDD
VREGIN
GND
C2D
Reset
Power-On
Reset
Supply
Monitor
Power
Net
Voltage
Regulators
Debug / Programming
Hardware
CIP-51 8051 Controller
Core
16 KB ISP Flash
Program Memory
256 Byte SRAM
2048 Byte XRAM
EXTCLK
Independent
Watchdog Timer
SYSCLK SFR
Bus
System Clock
Configuration
49 MHz 1.5%
Oscillator
24.5 MHz 2%
Oscillator
Low-Freq.
Oscillator
CMOS Oscillator
Input
Port I/O Configuration
Digital Peripherals
UART0
UART1
Timers 0,
1, 2, 3, 4
3-ch PCA
I2C Slave
I2C /
SMBus
Priority
Crossbar
Decoder
SPI
CRC
Crossbar Control
Analog Peripherals
Internal
Reference
VDD
VREF
12/10 bit
ADC
VDD
Temp
Sensor
+-+-
2 Comparators
Figure 3.1. Detailed EFM8BB2 Block Diagram
Port 0
Drivers
Port 1
Drivers
Port 2
Drivers
Port 3
Drivers
P0.n
P1.n
P2.n
P3.n
silabs.com | Smart. Connected. Energy-friendly.
Rev. 1.1 | 3

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EFM8BB2 전자부품, 판매, 대치품
EFM8BB2 Data Sheet
System Overview
Timers (Timer 0, Timer 1, Timer 2, Timer 3, and Timer 4)
Several counter/timers are included in the device: two are 16-bit counter/timers compatible with those found in the standard 8051, and
the rest are 16-bit auto-reload timers for timing peripherals or for general purpose use. These timers can be used to measure time inter-
vals, count external events and generate periodic interrupt requests. Timer 0 and Timer 1 are nearly identical and have four primary
modes of operation. The other timers offer both 16-bit and split 8-bit timer functionality with auto-reload and capture capabilities.
Timer 0 and Timer 1 include the following features:
• Standard 8051 timers, supporting backwards-compatibility with firmware and hardware.
• Clock sources include SYSCLK, SYSCLK divided by 12, 4, or 48, the External Clock divided by 8, or an external pin.
• 8-bit auto-reload counter/timer mode
• 13-bit counter/timer mode
• 16-bit counter/timer mode
• Dual 8-bit counter/timer mode (Timer 0)
Timer 2, Timer 3 and Timer 4 are 16-bit timers including the following features:
• Clock sources for all timers include SYSCLK, SYSCLK divided by 12, or the External Clock divided by 8.
• LFOSC0 divided by 8 may be used to clock Timer 3 and Timer 4 in active or suspend/snooze power modes.
• Timer 4 is a low-power wake source, and can be chained together with Timer 3
• 16-bit auto-reload timer mode
• Dual 8-bit auto-reload timer mode
• External pin capture
• LFOSC0 capture
• Comparator 0 capture
Watchdog Timer (WDT0)
The device includes a programmable watchdog timer (WDT) running off the low-frequency oscillator. A WDT overflow forces the MCU
into the reset state. To prevent the reset, the WDT must be restarted by application software before overflow. If the system experiences
a software or hardware malfunction preventing the software from restarting the WDT, the WDT overflows and causes a reset. Following
a reset, the WDT is automatically enabled and running with the default maximum time interval. If needed, the WDT can be disabled by
system software or locked on to prevent accidental disabling. Once locked, the WDT cannot be disabled until the next system reset.
The state of the RST pin is unaffected by this reset.
The Watchdog Timer has the following features:
• Programmable timeout interval
• Runs from the low-frequency oscillator
• Lock-out feature to prevent any modification until a system reset
3.6 Communications and Other Digital Peripherals
Universal Asynchronous Receiver/Transmitter (UART0)
UART0 is an asynchronous, full duplex serial port offering modes 1 and 3 of the standard 8051 UART. Enhanced baud rate support
allows a wide range of clock sources to generate standard baud rates. Received data buffering allows UART0 to start reception of a
second incoming data byte before software has finished reading the previous data byte.
The UART module provides the following features:
• Asynchronous transmissions and receptions
• Baud rates up to SYSCLK/2 (transmit) or SYSCLK/8 (receive)
• 8- or 9-bit data
• Automatic start and stop generation
• Single-byte buffer on transmit and receive
silabs.com | Smart. Connected. Energy-friendly.
Rev. 1.1 | 6

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