EFM8 Busy Bee Family
EFM8BB3 Data Sheet
The EFM8BB3, part of the Busy Bee family of MCUs, is a performance line of 8-bit microcontrollers with a comprehensive analog and digital feature set in small packages.
These devices offer state-of-the-art performance by integrating 12-bit ADC, internal
temperature sensor, and up to two 12-bit DACs into small packages, making them ideal
for general purpose applications. With an efficient, pipelined 8051 core with maximum
operating frequency at 50 MHz, various communication interfaces, and four channels
of configurable logic, the EFM8BB3 family is optimal for many embedded applications.
EFM8BB3 applications include the following:
• Consumer electronics
• Precision instrumentation
• Power management and control
KEY FEATURES
• Pipelined 8-bit 8051 MCU Core with
50 MHz operating frequency
• Up to 29 multifunction I/O pins
• One 12-bit/10-bit ADC
• Two 12-bit DACs with synchronization and
PWM capabilities
• Two low-current analog comparators with
built-in reference DACs
• Internal temperature sensor
• Industrial control and automation
• Smart sensors
• Internal 49 MHz and 24.5 MHz oscillators
accurate to ±2%
• Four channels of Configurable Logic
• 6-channel PWM / PCA
• Six 16-bit general-purpose timers
Core / Memory
Clock Management
CIP-51 8051 Core
(50 MHz)
Flash Program
Memory
RAM Memory
(up to 4352 bytes)
(up to 64 KB)
Debug Interface
with C2
Energy Management
External
Oscillator
High Frequency
49 MHz RC
Oscillator
Low Frequency
RC Oscillator
High Frequency
24.5 MHz RC
Oscillator
Internal LDO
Regulator
Power-On Reset
Brown-Out Detector
8-bit SFR bus
Serial Interfaces
2 x UART
2
I C / SMBus
SPI
High-Speed
I2C Slave
I/O Ports
External
Interrupts
General
Purpose I/O
Pin Reset
Pin Wakeup
Timers and Triggers
Timers
0/1/2/5
PCA/PWM
Watchdog
Timer
Timer 3/4
4 x Configurable Logic Units
Analog Interfaces
ADC
2x
Comparators
Up to 4 x
Voltage DAC
Internal
Voltage
Reference
Security
16-bit CRC
Lowest power mode with peripheral operational:
Normal
Idle
Suspend
Snooze
Shutdown
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This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
Preliminary Rev. 0.2
EFM8BB3 Data Sheet
Feature List
1. Feature List
The EFM8BB3 device family are fully integrated, mixed-signal system-on-a-chip MCUs. Highlighted features are listed below.
• Core:
• Analog:
• Pipelined CIP-51 Core
• 12/10-Bit Analog-to-Digital Converter (ADC)
• Fully compatible with standard 8051 instruction set
• Internal temperature sensor
• 70% of instructions execute in 1-2 clock cycles
• 2 x 12-Bit Digital-to-Analog Converters (DAC)
• 50 MHz maximum operating frequency
• 2 x Low-current analog comparators with adjustable refer• Memory:
ence
• Up to 64 kB flash memory (63 kB user-accessible), in-sys• Communications and Digital Peripherals:
tem re-programmable from firmware in 512-byte sectors
• 2 x UART, up to 3 Mbaud
• Up to 4352 bytes RAM (including 256 bytes standard 8051
• SPI™ Master / Slave, up to 12 Mbps
RAM and 4096 bytes on-chip XRAM)
• SMBus™/I2C™ Master / Slave, up to 400 kbps
• Power:
• I2C High-Speed Slave, up to 3.4 Mbps
• Internal LDO regulator for CPU core voltage
• 16-bit CRC unit, supporting automatic CRC of flash at 256• Power-on reset circuit and brownout detectors
byte boundaries
• I/O: Up to 29 total multifunction I/O pins:
• 4 Configurable Logic Units
• Up to 25 pins 5 V tolerant under bias
• Timers/Counters and PWM:
• Selectable state retention through reset events
• 6-channel programmable counter array (PCA) supporting
• Flexible peripheral crossbar for peripheral routing
PWM, capture/compare, and frequency output modes
• 5 mA source, 12.5 mA sink allows direct drive of LEDs
• 6 x 16-bit general-purpose timers
• Clock Sources:
• Independent watchdog timer, clocked from the low frequency oscillator
• Internal 49 MHz oscillator with accuracy of ±1.5%
• On-Chip, Non-Intrusive Debugging
• Internal 24.5 MHz oscillator with ±2% accuracy
• Full memory and register inspection
• Internal 80 kHz low-frequency oscillator
• Four hardware breakpoints, single-stepping
• External CMOS clock option
• External crystal/RC/C Oscillator (up to 25 MHz)
With on-chip power-on reset, voltage supply monitor, watchdog timer, and clock oscillator, the EFM8BB3 devices are truly standalone
system-on-a-chip solutions. The flash memory is reprogrammable in-circuit, providing nonvolatile data storage and allowing field upgrades 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. Device operation is specified from 2.2 V up to a 3.6 V supply. Devices are AEC-Q100 qualified (pending) and available in 4x4 mm 32-pin QFN, 3x3 mm 24-pin QFN, 32-pin QFP, or 24-pin QSOP packages. All package options are lead-free and RoHS
compliant.
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Preliminary Rev. 0.2 | 1
EFM8BB3 Data Sheet
Ordering Information
2. Ordering Information
EFM8 BB3 1 F 64 G – A – QFN32 R
Tape and Reel (Optional)
Package Type
Revision
Temperature Grade G (-40 to +85)
Flash Memory Size – 64 KB
Memory Type (Flash)
Family Feature Set
Busy Bee 3 Family
Silicon Labs EFM8 Product Line
Figure 2.1. EFM8BB3 Part Numbering
All EFM8BB3 family members have the following features:
• CIP-51 Core running up to 49 MHz
• Three Internal Oscillators (49 MHz, 24.5 MHz and 80 kHz)
• SMBus
• I2C Slave
• SPI
• 2 UARTs
• 6-Channel Programmable Counter Array (PWM, Clock Generation, Capture/Compare)
• Six 16-bit Timers
• Four Configurable Logic Units
• 12-bit Analog-to-Digital Converter with integrated multiplexer, voltage reference, temperature sensor, channel sequencer, and directto-XRAM data transfer
• Two Voltage Digital-to-Analog Converters (DACs)
• Two Analog Comparators
• 16-bit CRC Unit
• AEC-Q100 qualified (pending)
In addition to these features, each part number in the EFM8BB3 family has a set of features that vary across the product line. The
product selection guide shows the features available on each family member.
Ordering Part Number
Flash Memory (kB)
RAM (Bytes)
Digital Port I/Os (Total)
Number of DACs
ADC0 Channels
Comparator 0 Inputs
Comparator 1 Inputs
Pb-free (RoHS Compliant)
Temperature Range
Package
Table 2.1. Product Selection Guide
EFM8BB31F64G-A-QFN32
64
4352
29
4
20
10
9
Yes
-40 to +85 °C
QFN32
EFM8BB31F64G-A-QFP32
64
4352
28
4
20
10
9
Yes
-40 to +85 °C
QFP32
EFM8BB31F64G-A-QFN24
64
4352
20
4
12
6
6
Yes
-40 to +85 °C
QFN24
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Preliminary Rev. 0.2 | 2
EFM8BB3 Data Sheet
Ordering Part Number
Flash Memory (kB)
RAM (Bytes)
Digital Port I/Os (Total)
Number of DACs
ADC0 Channels
Comparator 0 Inputs
Comparator 1 Inputs
Pb-free (RoHS Compliant)
Temperature Range
Package
Ordering Information
EFM8BB31F64G-A-QSOP24
64
4352
21
4
13
6
7
Yes
-40 to +85 °C
QSOP24
EFM8BB31F32G-A-QFN32
32
2304
29
2
20
10
9
Yes
-40 to +85 °C
QFN32
EFM8BB31F32G-A-QFP32
32
2304
28
2
20
10
9
Yes
-40 to +85 °C
QFP32
EFM8BB31F32G-A-QFN24
32
2304
20
2
12
6
6
Yes
-40 to +85 °C
QFN24
EFM8BB31F32G-A-QSOP24
32
2304
21
2
13
6
7
Yes
-40 to +85 °C
QSOP24
EFM8BB31F16G-A-QFN32
16
2304
29
2
20
10
9
Yes
-40 to +85 °C
QFN32
EFM8BB31F16G-A-QFP32
16
2304
28
2
20
10
9
Yes
-40 to +85 °C
QFP32
EFM8BB31F16G-A-QSOP24
16
2304
21
2
13
6
7
Yes
-40 to +85 °C
QSOP24
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EFM8BB3 Data Sheet
System Overview
3. System Overview
3.1 Introduction
Debug /
C2D
Programming
Hardware
C2CK/RSTb
Reset
CIP-51 8051 Controller
Core
Port I/O Configuration
Digital Peripherals
UART0
64 KB ISP Flash
Program Memory
Power-On
Reset
VIO
UART1
Timers 0,
1, 2, 3, 4, 5
256 Byte SRAM
Priority
Crossbar
Decoder
6-ch PCA
VDD
VREGIN
Power
Net
Voltage
Regulator
I2C Slave
4096 Byte XRAM
I2C /
SMBus
SPI
Independent
Watchdog
Timer
GND
SFR
Bus
Config.
Logic
Units (4)
System Clock
Configuration
Low Freq.
Oscillator
EXTCLK
XTAL1
XTAL2
CMOS Clock
Input
External Crystal /
RC Oscillator
49 MHz 1.5%
Oscillator
24.5 MHz 2%
Oscillator
P0.n
Port 1
Drivers
P1.n
Port 2
Drivers
P2.n
Port 3
Drivers
P3.n
CRC
SYSCLK
Crossbar
Control
Analog Peripherals
Internal
Reference
VDD
Up to 4 12bit DACs
VREF
VDD
12/10bit ADC
AMUX
Supply
Monitor
Port 0
Drivers
Temp
Sensor
+
-+
2 Comparators
Figure 3.1. Detailed EFM8BB3 Block Diagram
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EFM8BB3 Data Sheet
System Overview
3.2 Power
All internal circuitry draws power from the VDD supply pin. External I/O pins are powered from the VIO supply voltage (or VDD on devices without a separate VIO connection), while most of the internal circuitry is supplied by an on-chip LDO regulator. Control over the
device power can be achieved by enabling/disabling individual peripherals as needed. Each analog peripheral can be disabled when
not in use and placed in low power mode. Digital peripherals, such as timers and serial buses, have their clocks gated off and draw little
power when they are not in use.
Table 3.1. Power Modes
Power Mode
Normal
Idle
Suspend
Stop
Snooze
Shutdown
Details
Mode Entry
Wake-Up Sources
Set IDLE bit in PCON0
Any interrupt
Core and all peripherals clocked and fully operational
• Core halted
• All peripherals clocked and fully operational
• Code resumes execution on wake event
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Core and peripheral clocks halted
HFOSC0 and HFOSC1 oscillators stopped
Regulator in normal bias mode for fast wake
Timer 3 and 4 may clock from LFOSC0
Code resumes execution on wake event
1. Switch SYSCLK to
HFOSC0
2. Set SUSPEND bit in
PCON1
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•
•
•
•
Timer 4 Event
SPI0 Activity
I2C0 Slave Activity
Port Match Event
Comparator 0 Rising
Edge
• CLUn Interrupt-Enabled
Event
• All internal power nets shut down
• Pins retain state
• Exit on any reset source
1. Clear STOPCF bit in
REG0CN
2. Set STOP bit in
PCON0
Any reset source
• Core and peripheral clocks halted
• HFOSC0 and HFOSC1 oscillators stopped
• Regulator in low bias current mode for energy savings
• Timer 3 and 4 may clock from LFOSC0
• Code resumes execution on wake event
1. Switch SYSCLK to
HFOSC0
2. Set SNOOZE bit in
PCON1
•
•
•
•
•
• All internal power nets shut down
• Pins retain state
• Exit on pin or power-on reset
1. Set STOPCF bit in
REG0CN
2. Set STOP bit in
PCON0
• RSTb pin reset
• Power-on reset
Timer 4 Event
SPI0 Activity
I2C0 Slave Activity
Port Match Event
Comparator 0 Rising
Edge
• CLUn Interrupt-Enabled
Event
3.3 I/O
Digital and analog resources are externally available on the device’s multi-purpose I/O pins. Port pins P0.0-P2.3 can be defined as general-purpose I/O (GPIO), assigned to one of the internal digital resources through the crossbar or dedicated channels, or assigned to an
analog function. Port pins P2.4 to P3.7 can be used as GPIO. Additionally, the C2 Interface Data signal (C2D) is shared with P3.0 or
P3.7, depending on the package option.
The port control block offers the following features:
• Up to 29 multi-functions I/O pins, supporting digital and analog functions.
• Flexible priority crossbar decoder for digital peripheral assignment.
• Two drive strength settings for each port.
• State retention feature allows pins to retain configuration through most reset sources.
• Two direct-pin interrupt sources with dedicated interrupt vectors (INT0 and INT1).
• Up to 24 direct-pin interrupt sources with shared interrupt vector (Port Match).
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EFM8BB3 Data Sheet
System Overview
3.4 Clocking
The CPU core and peripheral subsystem may be clocked by both internal and external oscillator resources. By default, the system
clock comes up running from the 24.5 MHz oscillator divided by 8.
The clock control system offers the following features:
• Provides clock to core and peripherals.
• 24.5 MHz internal oscillator (HFOSC0), accurate to ±2% over supply and temperature corners.
• 49 MHz internal oscillator (HFOSC1), accurate to ±2% over supply and temperature corners.
• 80 kHz low-frequency oscillator (LFOSC0).
• External Crystal / RC / C Oscillator.
• External CMOS clock input (EXTCLK).
• Clock divider with eight settings for flexible clock scaling:
• Divide the selected clock source by 1, 2, 4, 8, 16, 32, 64, or 128.
• HFOSC0 and HFOSC1 include 1.5x pre-scalers for further flexibility.
3.5 Counters/Timers and PWM
Programmable Counter Array (PCA0)
The programmable counter array (PCA) provides multiple channels of enhanced timer and PWM functionality while requiring less CPU
intervention than standard counter/timers. The PCA consists of a dedicated 16-bit counter/timer and one 16-bit capture/compare module for each channel. The counter/timer is driven by a programmable timebase that has flexible external and internal clocking options.
Each capture/compare module may be configured to operate independently in one of five modes: Edge-Triggered Capture, Software
Timer, High-Speed Output, Frequency Output, or Pulse-Width Modulated (PWM) Output. Each capture/compare module has its own
associated I/O line (CEXn) which is routed through the crossbar to port I/O when enabled.
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•
•
•
•
•
•
•
•
•
16-bit time base
Programmable clock divisor and clock source selection
Up to six independently-configurable channels
8, 9, 10, 11 and 16-bit PWM modes (center or edge-aligned operation)
Output polarity control
Frequency output mode
Capture on rising, falling or any edge
Compare function for arbitrary waveform generation
Software timer (internal compare) mode
Can accept hardware “kill” signal from comparator 0 or comparator 1
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EFM8BB3 Data Sheet
System Overview
Timers (Timer 0, Timer 1, Timer 2, Timer 3, Timer 4, and Timer 5)
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 intervals, 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, Timer 4, and Timer 5 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
• Configurable Logic output 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
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EFM8BB3 Data Sheet
System Overview
Universal Asynchronous Receiver/Transmitter (UART1)
UART1 is an asynchronous, full duplex serial port offering a variety of data formatting options. A dedicated baud rate generator with a
16-bit timer and selectable prescaler is included, which can generate a wide range of baud rates. A received data FIFO allows UART1
to receive multiple bytes before data is lost and an overflow occurs.
UART1 provides the following features:
• Asynchronous transmissions and receptions
• Dedicated baud rate generator supports baud rates up to SYSCLK/2 (transmit) or SYSCLK/8 (receive)
• 5, 6, 7, 8, or 9 bit data
• Automatic start and stop generation
• Automatic parity generation and checking
• Single-byte buffer on transmit and receive
• Auto-baud detection
• LIN break and sync field detection
• CTS / RTS hardware flow control
Serial Peripheral Interface (SPI0)
The serial peripheral interface (SPI) module provides access to a flexible, full-duplex synchronous serial bus. The SPI can operate as a
master or slave device in both 3-wire or 4-wire modes, and supports multiple masters and slaves on a single SPI bus. The slave-select
(NSS) signal can be configured as an input to select the SPI in slave mode, or to disable master mode operation in a multi-master
environment, avoiding contention on the SPI bus when more than one master attempts simultaneous data transfers. NSS can also be
configured as a firmware-controlled chip-select output in master mode, or disabled to reduce the number of pins required. Additional
general purpose port I/O pins can be used to select multiple slave devices in master mode.
•
•
•
•
•
•
•
•
Supports 3- or 4-wire master or slave modes
Supports external clock frequencies up to 12 Mbps in master or slave mode
Support for all clock phase and polarity modes
8-bit programmable clock rate (master)
Programmable receive timeout (slave)
Two byte FIFO on transmit and receive
Can operate in suspend or snooze modes and wake the CPU on reception of a byte
Support for multiple masters on the same data lines
System Management Bus / I2C (SMB0)
The SMBus I/O interface is a two-wire, bi-directional serial bus. The SMBus is compliant with the System Management Bus Specification, version 1.1, and compatible with the I2C serial bus.
The SMBus module includes the following features:
• Standard (up to 100 kbps) and Fast (400 kbps) transfer speeds
• Support for master, slave, and multi-master modes
• Hardware synchronization and arbitration for multi-master mode
• Clock low extending (clock stretching) to interface with faster masters
• Hardware support for 7-bit slave and general call address recognition
• Firmware support for 10-bit slave address decoding
• Ability to inhibit all slave states
• Programmable data setup/hold times
• Transmit and receive buffers to help increase throughput in faster applications
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EFM8BB3 Data Sheet
System Overview
I2C Slave (I2CSLAVE0)
The I2C Slave interface is a 2-wire, bidirectional serial bus that is compatible with the I2C Bus Specification 3.0. It is capable of transferring in high-speed mode (HS-mode) at speeds of up to 3.4 Mbps. Firmware can write to the I2C interface, and the I2C interface can
autonomously control the serial transfer of data. The interface also supports clock stretching for cases where the core may be temporarily prohibited from transmitting a byte or processing a received byte during an I2C transaction. This module operates only as an I2C
slave device.
The I2C module includes the following features:
• Standard (up to 100 kbps), Fast (400 kbps), Fast Plus (1 Mbps), and High-speed (3.4 Mbps) transfer speeds
• Support for slave mode only
• Clock low extending (clock stretching) to interface with faster masters
• Hardware support for 7-bit slave address recognition
• Hardware support for multiple slave addresses with the option to save the matching address in the receive FIFO
16-bit CRC (CRC0)
The cyclic redundancy check (CRC) module performs a CRC using a 16-bit polynomial. CRC0 accepts a stream of 8-bit data and posts
the 16-bit result to an internal register. In addition to using the CRC block for data manipulation, hardware can automatically CRC the
flash contents of the device.
The CRC module is designed to provide hardware calculations for flash memory verification and communications protocols. The CRC
module supports the standard CCITT-16 16-bit polynomial (0x1021), and includes the following features:
• Support for CCITT-16 polynomial
• Byte-level bit reversal
• Automatic CRC of flash contents on one or more 256-byte blocks
• Initial seed selection of 0x0000 or 0xFFFF
Configurable Logic Units (CLU0, CLU1, CLU2, and CLU3)
The Configurable Logic block consists of multiple Configurable Logic Units (CLUs). CLUs are flexible logic functions which may be used
for a variety of digital functions, such as replacing system glue logic, aiding in the generation of special waveforms, or synchronizing
system event triggers.
• Four configurable logic units (CLUs), with direct-pin and internal logic connections
• Each unit supports 256 different combinatorial logic functions (AND, OR, XOR, muxing, etc.) and includes a clocked flip-flop for synchronous operations
• Units may be operated synchronously or asynchronously
• May be cascaded together to perform more complicated logic functions
• Can operate in conjunction with serial peripherals such as UART and SPI or timing peripherals such as timers and PCA channels
• Can be used to synchronize and trigger multiple on-chip resources (ADC, DAC, Timers, etc.)
• Asynchronous output may be used to wake from low-power states
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EFM8BB3 Data Sheet
System Overview
3.7 Analog
12/10-Bit Analog-to-Digital Converter (ADC0)
The ADC is a successive-approximation-register (SAR) ADC with 12- and 10-bit modes, integrated track-and hold and a programmable
window detector. The ADC is fully configurable under software control via several registers. The ADC may be configured to measure
different signals using the analog multiplexer. The voltage reference for the ADC is selectable between internal and external reference
sources.
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•
•
•
•
•
•
•
•
•
•
•
Up to 20 external inputs
Single-ended 12-bit and 10-bit modes
Supports an output update rate of up to 400 ksps in 12-bit mode
Channel sequencer logic with direct-to-XDATA output transfers
Operation in a low power mode at lower conversion speeds
Asynchronous hardware conversion trigger, selectable between software, external I/O and internal timer and configurable logic sources
Output data window comparator allows automatic range checking
Support for output data accumulation
Conversion complete and window compare interrupts supported
Flexible output data formatting
Includes a fully-internal fast-settling 1.65 V reference and an on-chip precision 2.4 / 1.2 V reference, with support for using the supply as the reference, an external reference and signal ground
Integrated temperature sensor
12-Bit Digital-to-Analog Converters (DAC0, DAC1, DAC2, DAC3)
The DAC modules are 12-bit Digital-to-Analog Converters with the capability to synchronize multiple outputs together. The DACs are
fully configurable under software control. The voltage reference for the DACs is selectable between internal and external reference
sources.
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•
•
•
•
•
•
•
•
Voltage output with 12-bit performance
Supports an update rate of 200 ksps
Hardware conversion trigger, selectable between software, external I/O and internal timer and configurable logic sources
Outputs may be configured to persist through reset and maintain output state to avoid system disruption
Multiple DAC outputs can be synchronized together
DAC pairs (DAC0 and 1 or DAC2 and 3) support complementary output waveform generation
Outputs may be switched between two levels according to state of configurable logic / PWM input trigger
Flexible input data formatting
Supports references from internal supply, on-chip precision reference, or external VREF pin
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EFM8BB3 Data Sheet
System Overview
Low Current Comparators (CMP0, CMP1)
An analog comparator is used to compare the voltage of two analog inputs, with a digital output indicating which input voltage is higher.
External input connections to device I/O pins and internal connections are available through separate multiplexers on the positive and
negative inputs. Hysteresis, response time, and current consumption may be programmed to suit the specific needs of the application.
The comparator includes the following features:
• Up to 10 (CMP0) or 9 (CMP1) external positive inputs
• Up to 10 (CMP0) or 9 (CMP1) external negative inputs
• Additional input options:
• Internal connection to LDO output
• Direct connection to GND
• Direct connection to VDD
• Dedicated 6-bit reference DAC
• Synchronous and asynchronous outputs can be routed to pins via crossbar
• Programmable hysteresis between 0 and ±20 mV
• Programmable response time
• Interrupts generated on rising, falling, or both edges
• PWM output kill feature
3.8 Reset Sources
Reset circuitry allows the controller to be easily placed in a predefined default condition. On entry to this reset state, the following occur:
• The core halts program execution.
• Module registers are initialized to their defined reset values unless the bits reset only with a power-on reset.
• External port pins are forced to a known state.
• Interrupts and timers are disabled.
All registers are reset to the predefined values noted in the register descriptions unless the bits only reset with a power-on reset. The
contents of RAM are unaffected during a reset; any previously stored data is preserved as long as power is not lost. By default, the Port
I/O latches are reset to 1 in open-drain mode, with weak pullups enabled during and after the reset. Optionally, firmware may configure
the port I/O, DAC outputs, and precision reference to maintain state through system resets other than power-on resets. For Supply
Monitor and power-on resets, the RSTb pin is driven low until the device exits the reset state. On exit from the reset state, the program
counter (PC) is reset, and the system clock defaults to an internal oscillator. The Watchdog Timer is enabled, and program execution
begins at location 0x0000.
Reset sources on the device include the following:
• Power-on reset
• External reset pin
• Comparator reset
• Software-triggered reset
• Supply monitor reset (monitors VDD supply)
• Watchdog timer reset
• Missing clock detector reset
• Flash error reset
3.9 Debugging
The EFM8BB3 devices include an on-chip Silicon Labs 2-Wire (C2) debug interface to allow flash programming and in-system debugging with the production part installed in the end application. The C2 interface uses a clock signal (C2CK) and a bi-directional C2 data
signal (C2D) to transfer information between the device and a host system. See the C2 Interface Specification for details on the C2
protocol.
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Preliminary Rev. 0.2 | 11
EFM8BB3 Data Sheet
System Overview
3.10 Bootloader
All devices come pre-programmed with a UART0 bootloader. This bootloader resides in the code security page, which is the last page
of code flash; it can be erased if it is not needed.
The byte before the Lock Byte is the Bootloader Signature Byte. Setting this byte to a value of 0xA5 indicates the presence of the bootloader in the system. Any other value in this location indicates that the bootloader is not present in flash.
When a bootloader is present, the device will jump to the bootloader vector after any reset, allowing the bootloader to run. The bootloader then determines if the device should stay in bootload mode or jump to the reset vector located at 0x0000. When the bootloader
is not present, the device will jump to the reset vector of 0x0000 after any reset.
0xFFFF
Read-Only
64 Bytes
0xFFC0
0xFFBF
0xFBFF
Lock Byte
0xFBFE
Bootloader Signature Byte
0xFBFD
Code Security Page
0xFA00
0xF9FF
512 Bytes
Bootloader
Reserved
0xFC00
Bootloader Vector
62.5 KB Code
(125 x 512 Byte pages)
0x0000
Reset Vector
Figure 3.2. Flash Memory Map with Bootloader — 62.5 KB Devices
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Preliminary Rev. 0.2 | 12
EFM8BB3 Data Sheet
Electrical Specifications
4. Electrical Specifications
4.1 Electrical Characteristics
All electrical parameters in all tables are specified under the conditions listed in Table 4.1 Recommended Operating Conditions on page
13, unless stated otherwise.
4.1.1 Recommended Operating Conditions
Table 4.1. Recommended Operating Conditions
Parameter
Symbol
Operating Supply Voltage on VDD
VDD
Operating Supply Voltage on VIO2, VIO
Test Condition
Min
Typ
Max
Unit
2.2
—
3.6
V
TBD
—
VDD
V
0
—
50
MHz
-40
—
85
°C
3
System Clock Frequency
fSYSCLK
Operating Ambient Temperature
TA
Note:
1. All voltages with respect to GND
2. In certain package configurations, the VIO and VDD supplies are bonded to the same pin.
3. GPIO levels are undefined whenever VIO is less than 1 V.
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EFM8BB3 Data Sheet
Electrical Specifications
4.1.2 Power Consumption
Table 4.2. Power Consumption
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
FSYSCLK = 49 MHz2
—
TBD
TBD
mA
FSYSCLK = 24.5 MHz2
—
4.5
TBD
mA
FSYSCLK = 1.53 MHz2
—
615
TBD
μA
FSYSCLK = 80 kHz3
—
155
TBD
μA
FSYSCLK = 49 MHz2
—
TBD
TBD
mA
FSYSCLK = 24.5 MHz2
—
2.8
TBD
mA
FSYSCLK = 1.53 MHz2
—
455
TBD
μA
FSYSCLK = 80 kHz3
—
145
TBD
μA
LFO Running
—
125
TBD
μA
LFO Stopped
—
120
TBD
μA
LFO Running
—
26
TBD
μA
LFO Stopped
—
21
TBD
μA
Digital Core Supply Current
Normal Mode-Full speed with code IDD
executing from flash
Idle Mode-Core halted with peripherals running
IDD
Suspend Mode-Core halted and
high frequency clocks stopped,
Supply monitor off.
IDD
Snooze Mode-Core halted and
high frequency clocks stopped.
Regulator in low-power state, Supply monitor off.
IDD
Stop Mode—Core halted and all
clocks stopped,Internal LDO On,
Supply monitor off.
IDD
—
120
TBD
μA
Shutdown Mode—Core halted and
all clocks stopped,Internal LDO
Off, Supply monitor off.
IDD
—
0.2
—
μA
—
55
—
μA
—
TBD
—
μA
—
5
—
μA
Analog Peripheral Supply Currents
High-Frequency Oscillator 0
IHFOSC0
Operating at 24.5 MHz,
TA = 25 °C
High-Frequency Oscillator 1
IHFOSC1
Operating at 49 MHz,
TA = 25 °C
Low-Frequency Oscillator
ILFOSC
Operating at 80 kHz,
TA = 25 °C
ADC04
IADC
TBD
—
TBD
TBD
μA
Internal ADC0 Reference5
IVREFFS
Normal Power Mode
—
680
TBD
μA
Low Power Mode
—
160
TBD
μA
On-chip Precision Reference
IVREFP
—
75
—
µA
Temperature Sensor
ITSENSE
—
75
120
μA
Digital-to-Analog Converters
(DAC0, DAC1)6
IDAC
—
125
—
µA
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Preliminary Rev. 0.2 | 14
EFM8BB3 Data Sheet
Electrical Specifications
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Comparators (CMP0, CMP1)
ICMP
CPMD = 11
—
0.5
—
μA
CPMD = 10
—
3
—
μA
CPMD = 01
—
10
—
μA
CPMD = 00
—
25
—
μA
Comparator Reference
ICPREF
—
TBD
—
μA
Voltage Supply Monitor (VMON0)
IVMON
—
15
20
μA
Note:
1. Currents are additive. For example, where IDD is specified and the mode is not mutually exclusive, enabling the functions increases supply current by the specified amount.
2. Includes supply current from internal LDO regulator, supply monitor, and High Frequency Oscillator.
3. Includes supply current from internal LDO regulator, supply monitor, and Low Frequency Oscillator.
4. ADC0 power excludes internal reference supply current.
5. The internal reference is enabled as-needed when operating the ADC in low power mode. Total ADC + Reference current will
depend on sampling rate.
6. DAC supply current for each enabled DA and not including external load on pin.
4.1.3 Reset and Supply Monitor
Table 4.3. Reset and Supply Monitor
Parameter
Symbol
VDD Supply Monitor Threshold
VVDDM
Power-On Reset (POR) Threshold
VPOR
Test Condition
Min
Typ
Max
Unit
1.85
1.95
2.1
V
Rising Voltage on VDD
—
1.4
—
V
Falling Voltage on VDD
0.75
—
1.36
V
VDD Ramp Time
tRMP
Time to VDD > 2.2 V
10
—
—
μs
Reset Delay from POR
tPOR
Relative to VDD > VPOR
3
10
31
ms
Time between release of reset
source and code execution
—
50
—
μs
15
—
—
μs
—
0.625
1.2
ms
Reset Delay from non-POR source tRST
RST Low Time to Generate Reset
tRSTL
Missing Clock Detector Response
Time (final rising edge to reset)
tMCD
Missing Clock Detector Trigger
Frequency
FMCD
—
7.5
13.5
kHz
VDD Supply Monitor Turn-On Time tMON
—
2
—
μs
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FSYSCLK >1 MHz
Preliminary Rev. 0.2 | 15
EFM8BB3 Data Sheet
Electrical Specifications
4.1.4 Flash Memory
Table 4.4. Flash Memory
Parameter
Symbol
Test Condition
Min
Typ
Max
Units
Write Time1 ,2
tWRITE
One Byte,
19
20
21
μs
5.2
5.35
5.5
ms
VDD Voltage During Programming3 VPROG
2.2
—
3.6
V
Endurance (Write/Erase Cycles)
20k
100k
—
Cycles
FSYSCLK = 24.5 MHz
Erase Time1 ,2
tERASE
One Page,
FSYSCLK = 24.5 MHz
NWE
Note:
1. Does not include sequencing time before and after the write/erase operation, which may be multiple SYSCLK cycles.
2. The internal High-Frequency Oscillator 0 has a programmable output frequency, which is factory programmed to 24.5 MHz. If
user firmware adjusts the oscillator speed, it must be between 22 and 25 MHz during any flash write or erase operation. It is
recommended to write the HFO0CAL register back to its reset value when writing or erasing flash.
3. Flash can be safely programmed at any voltage above the supply monitor threshold (VVDDM).
4. Data Retention Information is published in the Quarterly Quality and Reliability Report.
4.1.5 Power Management Timing
Table 4.5. Power Management Timing
Parameter
Symbol
Idle Mode Wake-up Time
tIDLEWK
Suspend Mode Wake-up Time
Snooze Mode Wake-up Time
Test Condition
tSUS-
SYSCLK = HFOSC0
PENDWK
CLKDIV = 0x00
tSLEEPWK
SYSCLK = HFOSC0
Min
Typ
Max
Units
2
—
3
SYSCLKs
—
170
—
ns
—
12
—
µs
CLKDIV = 0x00
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EFM8BB3 Data Sheet
Electrical Specifications
4.1.6 Internal Oscillators
Table 4.6. Internal Oscillators
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
High Frequency Oscillator 0 (24.5 MHz)
Oscillator Frequency
fHFOSC0
Full Temperature and Supply
Range
24
24.5
25
MHz
Power Supply Sensitivity
PSSHFOS
TA = 25 °C
—
0.5
—
%/V
—
40
—
ppm/°C
48.25
49
49.75
MHz
—
TBD
—
%/V
TSHFOSC1 VDD = 3.0 V
—
TBD
—
ppm/°C
Oscillator Frequency
fLFOSC
75
80
85
kHz
Power Supply Sensitivity
PSSLFOSC TA = 25 °C
—
0.05
—
%/V
Temperature Sensitivity
TSLFOSC
—
65
—
ppm/°C
Min
Typ
Max
Unit
C0
Temperature Sensitivity
TSHFOSC0 VDD = 3.0 V
High Frequency Oscillator 1 (49 MHz)
Oscillator Frequency
fHFOSC1
Full Temperature and Supply
Range
Power Supply Sensitivity
PSSHFOS
TA = 25 °C
C1
Temperature Sensitivity
Low Frequency Oscillator (80 kHz)
Full Temperature and Supply
Range
VDD = 3.0 V
4.1.7 External Clock Input
Table 4.7. External Clock Input
Parameter
Symbol
Test Condition
External Input CMOS Clock
fCMOS
0
—
50
MHz
External Input CMOS Clock High
Time
tCMOSH
9
—
—
ns
External Input CMOS Clock Low
Time
tCMOSL
9
—
—
ns
Frequency (at EXTCLK pin)
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EFM8BB3 Data Sheet
Electrical Specifications
4.1.8 Crystal Oscillator
Table 4.8. Crystal Oscillator
Parameter
Symbol
Crystal Frequency
fXTAL
Crystal Drive Current
IXTAL
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Test Condition
Min
Typ
Max
Unit
0.02
—
25
MHz
XFCN = 0
—
0.5
—
µA
XFCN = 1
—
1.5
—
µA
XFCN = 2
—
4.8
—
µA
XFCN = 3
—
14
—
µA
XFCN = 4
—
40
—
µA
XFCN = 5
—
120
—
µA
XFCN = 6
—
550
—
µA
XFCN = 7
—
2.6
—
mA
Preliminary Rev. 0.2 | 18
EFM8BB3 Data Sheet
Electrical Specifications
4.1.9 ADC
Table 4.9. ADC
Parameter
Symbol
Test Condition
Resolution
Nbits
12 Bit Mode
12
Bits
10 Bit Mode
10
Bits
Throughput Rate
Min
Typ
Max
Unit
fS
10 Bit Mode
—
—
1.125
Msps
fS
12 Bit Mode
—
—
300
ksps
10 Bit Mode
—
—
1.125
Msps
High Speed Mode
230
—
—
ns
Low Power Mode
450
—
—
ns
1.2
—
—
μs
High Speed Mode
—
—
18
MHz
Low Power Mode
—
—
TBD
MHz
(High Speed Mode)
Throughput Rate
(Low Power Mode)
Tracking Time
tTRK
Power-On Time
tPWR
SAR Clock Frequency
fSAR
Conversion Time1
tCNV
12-Bit Conversion,
0.7
μs
0.59
μs
SAR Clock =18 MHz,
System Clock = 49 MHz
10-Bit Conversion,
SAR Clock =18 MHz,
System Clock = 49 MHz
Sample/Hold Capacitor
CSAR
Gain = 1
—
5.2
—
pF
Gain = 0.75
—
3.9
—
pF
Gain = 0.5
—
2.6
—
pF
Gain = 0.25
—
1.3
—
pF
Input Pin Capacitance
CIN
—
20
—
pF
Input Mux Impedance
RMUX
—
550
—
Ω
Voltage Reference Range
VREF
1
—
VIO
V
Input Voltage Range2
VIN
0
—
VREF /
Gain
V
Power Supply Rejection Ratio
PSRRADC
—
TBD
—
dB
12 Bit Mode
-1.4
TBD
+1.4
LSB
10 Bit Mode
—
TBD
—
LSB
12 Bit Mode
—
TBD
0.9
LSB
10 Bit Mode
—
TBD
—
LSB
12 Bit Mode
-2
TBD
2
LSB
10 Bit Mode
—
TBD
—
LSB
Gain = 1
DC Performance
Integral Nonlinearity
INL
Differential Nonlinearity (Guaranteed Monotonic)
DNL
Offset Error
EOFF
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EFM8BB3 Data Sheet
Electrical Specifications
Parameter
Symbol
Offset Temperature Coefficient
TCOFF
Slope Error
EM
Test Condition
Min
Typ
Max
Unit
—
TBD
—
LSB/°C
12 Bit Mode
—
TBD
TBD
%
10 Bit Mode
—
TBD
—
%
Dynamic Performance 10 kHz Sine Wave Input 1 dB below full scale, Max throughput, using AGND pin
Signal-to-Noise
Signal-to-Noise Plus Distortion
SNR
SNDR
Total Harmonic Distortion (Up to
5th Harmonic)
THD
Spurious-Free Dynamic Range
SFDR
12 Bit Mode
—
TBD
—
dB
10 Bit Mode
—
TBD
—
dB
12 Bit Mode
TBD
TBD
—
dB
10 Bit Mode
—
TBD
—
dB
12 Bit Mode
—
TBD
—
dB
10 Bit Mode
—
TBD
—
dB
12 Bit Mode
—
TBD
—
dB
10 Bit Mode
—
TBD
—
dB
Note:
1. Conversion Time does not include Tracking Time. Total Conversion Time is:
Total Conversion Time = RPT × (ADTK + NUMBITS + 1) × T(SARCLK) + (T(ADCCLK) × 4)
where RPT is the number of conversions represented by the ADRPT field and ADCCLK is the clock selected for the ADC.
2. Absolute input pin voltage is limited by the VIO supply.
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EFM8BB3 Data Sheet
Electrical Specifications
4.1.10 Voltage Reference
Table 4.10. Voltage Reference
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
1.62
1.65
1.68
V
Internal Fast Settling Reference
Output Voltage
VREFFS
(Full Temperature and Supply
Range)
Temperature Coefficient
TCREFFS
—
50
—
ppm/°C
Turn-on Time
tREFFS
—
—
1.5
μs
Power Supply Rejection
PSRRREF
—
400
—
ppm/V
1.2 V Output
2.2
—
3.6
V
2.4 V Output
2.7
—
3.6
V
1.2 V Output, T = 25 °C
TBD
1.2
TBD
V
2.4 V Output, T = 25 °C
TBD
2.4
TBD
V
4.7 µF tantalum + 0.1 µF ceramic
bypass on VREF pin
—
3
—
ms
0.1 µF ceramic bypass on VREF
pin
—
100
—
µs
FS
On-chip Precision Reference
Valid Supply Range
Output Voltage
Turn-on Time, settling to 0.5 LSB
VDD
VREFP
tVREFP
Load Regulation
LRVREFP
Load = 0 to 200 µA to GND
—
TBD
—
µV/µA
Load Capacitor
CVREFP
Load = 0 to 200 µA to GND
0.1
—
—
µF
Short-circuit current
ISCVREFP
—
—
8
mA
Power Supply Rejection
PSRRVRE
—
TBD
—
ppm/V
—
5
—
μA
FP
External Reference
Input Current
IEXTREF
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ADC Sample Rate = 800 ksps;
VREF = 3.0 V
Preliminary Rev. 0.2 | 21
EFM8BB3 Data Sheet
Electrical Specifications
4.1.11 Temperature Sensor
Table 4.11. Temperature Sensor
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Offset
VOFF
TA = 0 °C
—
TBD
—
mV
Offset Error1
EOFF
TA = 0 °C
—
TBD
—
mV
Slope
M
—
TBD
—
mV/°C
Slope Error1
EM
—
TBD
—
μV/°C
Linearity
—
TBD
—
°C
Turn-on Time
—
TBD
—
μs
Note:
1. Represents one standard deviation from the mean.
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Preliminary Rev. 0.2 | 22
EFM8BB3 Data Sheet
Electrical Specifications
4.1.12 DACs
Table 4.12. DACs
Parameter
Symbol
Resolution
Nbits
Throughput Rate
fS
Integral Nonlinearity
Test Condition
Min
Typ
Max
12
Unit
Bits
—
—
200
ksps
INL
TBD
±0.5
TBD
LSB
Differential Nonlinearity
DNL
TBD
±5
TBD
LSB
Output Noise
VREF
2.4 V
—
110
—
μVRMS
—
±1
—
V/μs
—
2.6
5
μs
=
fS = 0.1
Hz to 300
kHz
Slew Rate
SLEW
Output Settling Time to 1 LSB
tSETTLE
Power-on Time
tPWR
—
—
10
μs
Voltage Reference Range
VREF
1.15
—
VDD
V
Power Supply Rejection Ratio
PSRR
DC, VOUT = 50% Full Scale
—
110
—
dB
1 kHz, VOUT = 50% Full Scale
—
60
—
dB
60
—
—
dB
TBD
±0.5
TBD
LSB
—
TBD
—
ppm/°C
TBD
±5
TBD
LSB
VOUT change between 25% and
75% Full Scale
Total Harmonic Distortion
THD
VOUT = 10 kHz sine wave, 10% to
90%
Offset Error
EOFF
VREF = 2.4 V
Offset Temperature Coefficient
TCOFF
Full-Scale Error
EFS
Full-Scale Error Tempco
TCFS
—
TBD
—
ppm/°C
External Load Impedance
RLOAD
2
—
—
kΩ
External Load Capacitance
CLOAD
TBD
—
100
pF
—
100
TBD
μV/mA
Load Regulation
VREF = 2.4 V
VOUT = 50% Full Scale
IOUT = -2 to 2 mA
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Preliminary Rev. 0.2 | 23
EFM8BB3 Data Sheet
Electrical Specifications
4.1.13 Comparators
Table 4.13. Comparators
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Response Time, CPMD = 00
(Highest Speed)
tRESP0
+100 mV Differential
—
100
—
ns
-100 mV Differential
—
150
—
ns
Response Time, CPMD = 11 (Low- tRESP3
est Power)
+100 mV Differential
—
1.5
—
μs
-100 mV Differential
—
3.5
—
μs
Positive Hysteresis
CPHYP = 00
—
0.4
—
mV
CPHYP = 01
—
8
—
mV
CPHYP = 10
—
16
—
mV
CPHYP = 11
—
32
—
mV
CPHYN = 00
—
-0.4
—
mV
CPHYN = 01
—
-8
—
mV
CPHYN = 10
—
-16
—
mV
CPHYN = 11
—
-32
—
mV
CPHYP = 00
—
0.5
—
mV
CPHYP = 01
—
6
—
mV
CPHYP = 10
—
12
—
mV
CPHYP = 11
—
24
—
mV
CPHYN = 00
—
-0.5
—
mV
CPHYN = 01
—
-6
—
mV
CPHYN = 10
—
-12
—
mV
CPHYN = 11
—
-24
—
mV
CPHYP = 00
—
0.7
—
mV
CPHYP = 01
—
4.5
—
mV
CPHYP = 10
—
9
—
mV
CPHYP = 11
—
18
—
mV
CPHYN = 00
—
-0.6
—
mV
CPHYN = 01
—
-4.5
—
mV
CPHYN = 10
—
-9
—
mV
CPHYN = 11
—
-18
—
mV
CPHYP = 00
—
1.5
—
mV
CPHYP = 01
—
4
—
mV
CPHYP = 10
—
8
—
mV
CPHYP = 11
—
16
—
mV
HYSCP+
Mode 0 (CPMD = 00)
Negative Hysteresis
HYSCP-
Mode 0 (CPMD = 00)
Positive Hysteresis
HYSCP+
Mode 1 (CPMD = 01)
Negative Hysteresis
HYSCP-
Mode 1 (CPMD = 01)
Positive Hysteresis
HYSCP+
Mode 2 (CPMD = 10)
Negative Hysteresis
HYSCP-
Mode 2 (CPMD = 10)
Positive Hysteresis
HYSCP+
Mode 3 (CPMD = 11)
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EFM8BB3 Data Sheet
Electrical Specifications
Parameter
Symbol
Test Condition
Negative Hysteresis
HYSCP-
Mode 3 (CPMD = 11)
Min
Typ
Max
Unit
CPHYN = 00
—
-1.5
—
mV
CPHYN = 01
—
-4
—
mV
CPHYN = 10
—
-8
—
mV
CPHYN = 11
—
-16
—
mV
Input Range (CP+ or CP-)
VIN
-0.25
—
VIO+0.25
V
Input Pin Capacitance
CCP
—
7.5
—
pF
Internal Reference DAC Resolution Nbits
6
bits
Common-Mode Rejection Ratio
CMRRCP
—
70
—
dB
Power Supply Rejection Ratio
PSRRCP
—
72
—
dB
Input Offset Voltage
VOFF
-10
0
10
mV
Input Offset Tempco
TCOFF
—
3.5
—
μV/°
TA = 25 °C
4.1.14 Configurable Logic
Table 4.14. Configurable Logic
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Propagation Delay
tDLY
Through single CLU
TBD
—
TBD
ns
Clocking Frequency
FCLK
1 or 2 CLUs Cascaded
—
—
73.5
MHz
3 or 4 CLUs Cascaded
—
—
36.75
MHz
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EFM8BB3 Data Sheet
Electrical Specifications
4.1.15 Port I/O
Table 4.15. Port I/O
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Output High Voltage (High Drive)
VOH
IOH = -7 mA, VIO ≥ 3.0 V
VIO - 0.7
—
—
V
IOH = -3.3 mA, 2.2 V ≤ VIO < 3.0 V
VIO x 0.8
—
—
V
IOL = 13.5 mA, VIO ≥ 3.0 V
—
—
0.6
V
IOL = 7 mA, 2.2 V ≤ VIO < 3.0 V
—
—
VIO x 0.2
V
IOH = -4.75 mA, VIO ≥ 3.0 V
VIO - 0.7
—
—
V
IOH = -2.25 mA, 2.2 V ≤ VIO < 3.0 V
VIO x 0.8
—
—
V
IOL = 6.5 mA, VIO ≥ 3.0 V
—
—
0.6
V
IOL = 3.5 mA, 2.2 V ≤ VIO < 3.0 V
—
—
VIO x 0.2
V
0.7 x
—
—
V
—
0.3 x
V
IOH = -1.8 mA, 1.71 V ≤ VIO < 2.2 V
Output Low Voltage (High Drive)
VOL
IOL = 3.6 mA, 1.71 V ≤ VIO < 2.2 V
Output High Voltage (Low Drive)
VOH
IOH = -1.2 mA, 1.71 V ≤ VIO < 2.2 V
Output Low Voltage (Low Drive)
VOL
IOL = 1.8 mA, 1.71 V ≤ VIO < 2.2 V
Input High Voltage
VIH
VIO
Input Low Voltage
VIL
—
VIO
Pin Capacitance
CIO
—
7
—
pF
Weak Pull-Up Current
IPU
VDD = 3.6
-30
-20
-10
μA
Input Leakage (Pullups off or Analog)
ILK
GND < VIN < VIO
TBD
—
TBD
μA
Input Leakage Current with VIN
above VIO
ILK
VIO < VIN < VIO+2.5 V
0
5
150
μA
(VIN = 0 V)
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Preliminary Rev. 0.2 | 26
EFM8BB3 Data Sheet
Electrical Specifications
4.2 Thermal Conditions
Table 4.16. Thermal Conditions
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Thermal Resistance
θJA
QFN24 Packages
—
TBD
—
°C/W
QFN32 Packages
—
TBD
—
°C/W
QFP32 Packages
—
80
—
°C/W
QSOP24 Packages
—
65
—
°C/W
Note:
1. Thermal resistance assumes a multi-layer PCB with any exposed pad soldered to a PCB pad.
4.3 Absolute Maximum Ratings
Stresses above those listed in Table 4.17 Absolute Maximum Ratings on page 27 may cause permanent damage to the device. This
is a stress rating only and functional operation of the devices at those or any other conditions above those indicated in the operation
listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. For
more information on the available quality and reliability data, see the Quality and Reliability Monitor Report at http://www.silabs.com/
support/quality/pages/default.aspx.
Table 4.17. Absolute Maximum Ratings
Parameter
Symbol
Ambient Temperature Under Bias
Min
Max
Unit
TBIAS
-55
125
°C
Storage Temperature
TSTG
-65
150
°C
Voltage on VDD
VDD
GND-0.3
4.2
V
Voltage on VIO2
VIO
GND-0.3
VDD+0.3
V
VIO > TBD V
GND-0.3
TBD
V
VIO < TBD V
GND-0.3
TBD
V
Voltage on I/O pins or RSTb, excluding VIN
P2.0-P2.3 (QFN24 and QSOP24) or
P3.0-P3.3 (QFN32 and QFP32)
Test Condition
Voltage on P2.0-P2.3 (QFN24 and
QSOP24) or P3.0-P3.3 (QFN32 and
QFP32)
VIN
GND-0.3
VDD+0.3
V
Total Current Sunk into Supply Pin
IVDD
—
400
mA
Total Current Sourced out of Ground
Pin
IGND
400
—
mA
Current Sourced or Sunk by any I/O
Pin or RSTb
IIO
-100
100
mA
Note:
1. Exposure to maximum rating conditions for extended periods may affect device reliability.
2. In certain package configurations, the VIO and VDD supplies are bonded to the same pin.
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EFM8BB3 Data Sheet
Typical Connection Diagrams
5. Typical Connection Diagrams
5.1 Power
Figure 5.1 Power Connection Diagram on page 28 shows a typical connection diagram for the power pins of the device.
EFM8BB3 Device
1.8 - VDD V
2.2 - 3.6 V
4.7 µF and 0.1 µF bypass
capacitors required for
each power pin placed as
close to the pins as
possible.
VIO
VDD
GND
Figure 5.1. Power Connection Diagram
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EFM8BB3 Data Sheet
Typical Connection Diagrams
5.2 Debug
The diagram below shows a typical connection diagram for the debug connections pins. The pin sharing resistors are only required if
the functionality on the C2D (a GPIO pin) and the C2CK (RSTb) is routed to external circuitry. For example, if the RSTb pin is connected to an external switch with debouncing filter or if the GPIO sharing with the C2D pin is connected to an external circuit, the pin sharing resistors and connections to the debug adapter must be placed on the hardware. Otherwise, these components and connections
can be omitted.
For more information on debug connections, see the example schematics and information available in AN127: "Pin Sharing Techniques
for the C2 Interface." Application notes can be found on the Silicon Labs website (http://www.silabs.com/8bit-appnotes) or in Simplicity
Studio.
EFM8BB3 Device
VIO
External
System
1k
C2CK
(if pin sharing)
1k
1k
(if pin sharing)
C2D
1k
1k
GND
Debug Adapter
Figure 5.2. Debug Connection Diagram
5.3 Other Connections
Other components or connections may be required to meet the system-level requirements. Application Note AN203: "8-bit MCU Printed
Circuit Board Design Notes" contains detailed information on these connections. Application Notes can be accessed on the Silicon
Labs website (www.silabs.com/8bit-appnotes).
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Preliminary Rev. 0.2 | 29
EFM8BB3 Data Sheet
Pin Definitions
6. Pin Definitions
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
P1.0
32
31
30
29
28
27
26
25
6.1 EFM8BB3x-QFN32 Pin Definitions
P0.0
1
24
P1.1
VIO
2
23
P1.2
VDD
3
22
P1.3
RSTb / C2CK
4
21
P1.4
P3.7 / C2D
5
20
P1.5
P3.4
6
19
P1.6
P3.3
7
18
P1.7
17
P2.0
32 pin QFN
(Top View)
GND
10
11
12
13
14
15
16
P2.6
P2.5
P2.4
P2.3
P2.2
P2.1
P3.1
P3.0
8
9
P3.2
Figure 6.1. EFM8BB3x-QFN32 Pinout
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EFM8BB3 Data Sheet
Pin Definitions
Table 6.1. Pin Definitions for EFM8BB3x-QFN32
Pin
Pin Name
Description
Crossbar Capability
Additional Digital
Functions
Analog Functions
P0.0
Multifunction I/O
Yes
P0MAT.0
VREF
Number
1
INT0.0
INT1.0
CLU0A.8
CLU2A.8
CLU3B.8
2
VIO
I/O Supply Power Input
3
VDD
Supply Power Input
4
RSTb /
Active-low Reset /
C2CK
C2 Debug Clock
P3.7 /
Multifunction I/O /
C2D
C2 Debug Data
6
P3.4
Multifunction I/O
7
P3.3
Multifunction I/O
DAC3
8
P3.2
Multifunction I/O
DAC2
9
P3.1
Multifunction I/O
DAC1
10
P3.0
Multifunction I/O
DAC0
11
P2.6
Multifunction I/O
ADC0.19
5
CMP1P.8
CMP1N.8
12
P2.5
Multifunction I/O
CLU3OUT
ADC0.18
CMP1P.7
CMP1N.7
13
P2.4
Multifunction I/O
ADC0.17
CMP1P.6
CMP1N.6
14
P2.3
Multifunction I/O
Yes
P2MAT.3
ADC0.16
CLU1B.15
CMP1P.5
CLU2B.15
CMP1N.5
CLU3A.15
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EFM8BB3 Data Sheet
Pin Definitions
Pin
Pin Name
Description
Crossbar Capability
Additional Digital
Functions
Analog Functions
P2.2
Multifunction I/O
Yes
P2MAT.2
ADC0.15
CLU2OUT
CMP1P.4
CLU1A.15
CMP1N.4
Number
15
CLU2B.14
CLU3A.14
16
P2.1
Multifunction I/O
Yes
P2MAT.1
ADC0.14
I2C0_SCL
CMP1P.3
CLU1B.14
CMP1N.3
CLU2A.15
CLU3B.15
17
P2.0
Multifunction I/O
Yes
P2MAT.0
CMP1P.2
I2C0_SDA
CMP1N.2
CLU1A.14
CLU2A.14
CLU3B.14
18
P1.7
Multifunction I/O
Yes
P1MAT.7
ADC0.13
CLU0B.15
CMP0P.9
CLU1B.13
CMP0N.9
CLU2A.13
19
P1.6
Multifunction I/O
Yes
P1MAT.6
ADC0.12
CLU0A.15
CLU1B.12
CLU2A.12
20
P1.5
Multifunction I/O
Yes
P1MAT.5
ADC0.11
CLU0B.14
CLU1A.13
CLU2B.13
CLU3B.11
21
P1.4
Multifunction I/O
Yes
P1MAT.4
ADC0.10
CLU0A.14
CLU1A.12
CLU2B.12
CLU3B.10
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EFM8BB3 Data Sheet
Pin Definitions
Pin
Pin Name
Description
Crossbar Capability
Additional Digital
Functions
Analog Functions
P1.3
Multifunction I/O
Yes
P1MAT.3
ADC0.9
Number
22
CLU0B.13
CLU1B.11
CLU2B.11
CLU3A.13
23
P1.2
Multifunction I/O
Yes
P1MAT.2
ADC0.8
CLU0A.13
CMP0P.8
CLU1A.11
CMP0N.8
CLU2B.10
CLU3A.12
CLU3B.13
24
P1.1
Multifunction I/O
Yes
P1MAT.1
ADC0.7
CLU0B.12
CMP0P.7
CLU1B.10
CMP0N.7
CLU2A.11
CLU3B.12
25
26
P1.0
P0.7
Multifunction I/O
Multifunction I/O
Yes
Yes
P1MAT.0
ADC0.6
CLU1OUT
CMP0P.6
CLU0A.12
CMP0N.6
CLU1A.10
CMP1P.1
CLU2A.10
CMP1N.1
P0MAT.7
ADC0.5
INT0.7
CMP0P.5
INT1.7
CMP0N.5
CLU0B.11
CMP1P.0
CLU1B.9
CMP1N.0
CLU3A.11
27
P0.6
Multifunction I/O
Yes
P0MAT.6
ADC0.4
CNVSTR
CMP0P.4
INT0.6
CMP0N.4
INT1.6
CLU0A.11
CLU1B.8
CLU3A.10
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EFM8BB3 Data Sheet
Pin Definitions
Pin
Pin Name
Description
Crossbar Capability
Additional Digital
Functions
Analog Functions
P0.5
Multifunction I/O
Yes
P0MAT.5
ADC0.3
INT0.5
CMP0P.3
INT1.5
CMP0N.3
Number
28
UART0_RX
CLU0B.10
CLU1A.9
29
P0.4
Multifunction I/O
Yes
P0MAT.4
ADC0.2
INT0.4
CMP0P.2
INT1.4
CMP0N.2
UART0_TX
CLU0A.10
CLU1A.8
30
P0.3
Multifunction I/O
Yes
P0MAT.3
XTAL2
EXTCLK
INT0.3
INT1.3
CLU0B.9
CLU2B.10
CLU3A.9
31
P0.2
Multifunction I/O
Yes
P0MAT.2
XTAL1
INT0.2
ADC0.1
INT1.2
CMP0P.1
CLU0OUT
CMP0N.1
CLU0A.9
CLU2B.8
CLU3A.8
32
P0.1
Multifunction I/O
Yes
P0MAT.1
ADC0.0
INT0.1
CMP0P.0
INT1.1
CMP0N.0
CLU0B.8
AGND
CLU2A.9
CLU3B.9
Center
GND
Ground
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EFM8BB3 Data Sheet
Pin Definitions
25
P0.6
P0.7
P1.0
27
26
P0.3
P0.4
P0.5
30
28
P0.2
31
29
P0.1
32
6.2 EFM8BB3x-QFP32 Pin Definitions
P0.0
GND
1
24
2
23
P1.1
P1.2
VIO
3
22
P1.3
VDD
4
21
P1.4
RSTb / C2CK
5
20
P1.5
P3.7 / C2D
6
19
P1.6
P3.3
7
18
P1.7
P3.2
8
17
P2.0
16
15
14
P2.3
P2.2
P2.1
P2.6
P2.5
P2.4
13
11
12
10
P3.0
P3.1
9
32 Pin QFP
Figure 6.2. EFM8BB3x-QFP32 Pinout
Table 6.2. Pin Definitions for EFM8BB3x-QFP32
Pin
Pin Name
Description
Crossbar Capability
Additional Digital
Functions
Analog Functions
P0.0
Multifunction I/O
Yes
P0MAT.0
VREF
Number
1
INT0.0
INT1.0
CLU0A.8
CLU2A.8
CLU3B.8
2
GND
Ground
3
VIO
I/O Supply Power Input
4
VDD
Supply Power Input
5
RSTb /
Active-low Reset /
C2CK
C2 Debug Clock
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EFM8BB3 Data Sheet
Pin Definitions
Pin
Pin Name
Description
Crossbar Capability
P3.7 /
Multifunction I/O /
C2D
C2 Debug Data
7
P3.3
Multifunction I/O
DAC3
8
P3.2
Multifunction I/O
DAC2
9
P3.1
Multifunction I/O
DAC1
10
P3.0
Multifunction I/O
DAC0
11
P2.6
Multifunction I/O
ADC0.19
Number
6
Additional Digital
Functions
Analog Functions
CMP1P.8
CMP1N.8
12
P2.5
Multifunction I/O
CLU3OUT
ADC0.18
CMP1P.7
CMP1N.7
13
P2.4
Multifunction I/O
ADC0.17
CMP1P.6
CMP1N.6
14
P2.3
Multifunction I/O
Yes
P2MAT.3
ADC0.16
CLU1B.15
CMP1P.5
CLU2B.15
CMP1N.5
CLU3A.15
15
P2.2
Multifunction I/O
Yes
P2MAT.2
ADC0.15
CLU2OUT
CMP1P.4
CLU1A.15
CMP1N.4
CLU2B.14
CLU3A.14
16
P2.1
Multifunction I/O
Yes
P2MAT.1
ADC0.14
I2C0_SCL
CMP1P.3
CLU1B.14
CMP1N.3
CLU2A.15
CLU3B.15
17
P2.0
Multifunction I/O
Yes
P2MAT.0
CMP1P.2
I2C0_SDA
CMP1N.2
CLU1A.14
CLU2A.14
CLU3B.14
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EFM8BB3 Data Sheet
Pin Definitions
Pin
Pin Name
Description
Crossbar Capability
Additional Digital
Functions
Analog Functions
P1.7
Multifunction I/O
Yes
P1MAT.7
ADC0.13
CLU0B.15
CMP0P.9
CLU1B.13
CMP0N.9
Number
18
CLU2A.13
19
P1.6
Multifunction I/O
Yes
P1MAT.6
ADC0.12
CLU0A.15
CLU1B.12
CLU2A.12
20
P1.5
Multifunction I/O
Yes
P1MAT.5
ADC0.11
CLU0B.14
CLU1A.13
CLU2B.13
CLU3B.11
21
P1.4
Multifunction I/O
Yes
P1MAT.4
ADC0.10
CLU0A.14
CLU1A.12
CLU2B.12
CLU3B.10
22
P1.3
Multifunction I/O
Yes
P1MAT.3
ADC0.9
CLU0B.13
CLU1B.11
CLU2B.11
CLU3A.13
23
P1.2
Multifunction I/O
Yes
P1MAT.2
ADC0.8
CLU0A.13
CMP0P.8
CLU1A.11
CMP0N.8
CLU2B.10
CLU3A.12
CLU3B.13
24
P1.1
Multifunction I/O
Yes
P1MAT.1
ADC0.7
CLU0B.12
CMP0P.7
CLU1B.10
CMP0N.7
CLU2A.11
CLU3B.12
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EFM8BB3 Data Sheet
Pin Definitions
Pin
Pin Name
Description
Crossbar Capability
Additional Digital
Functions
Analog Functions
P1.0
Multifunction I/O
Yes
P1MAT.0
ADC0.6
CLU1OUT
CMP0P.6
CLU0A.12
CMP0N.6
CLU1A.10
CMP1P.1
CLU2A.10
CMP1N.1
P0MAT.7
ADC0.5
INT0.7
CMP0P.5
INT1.7
CMP0N.5
CLU0B.11
CMP1P.0
CLU1B.9
CMP1N.0
Number
25
26
P0.7
Multifunction I/O
Yes
CLU3A.11
27
P0.6
Multifunction I/O
Yes
P0MAT.6
ADC0.4
CNVSTR
CMP0P.4
INT0.6
CMP0N.4
INT1.6
CLU0A.11
CLU1B.8
CLU3A.10
28
P0.5
Multifunction I/O
Yes
P0MAT.5
ADC0.3
INT0.5
CMP0P.3
INT1.5
CMP0N.3
UART0_RX
CLU0B.10
CLU1A.9
29
P0.4
Multifunction I/O
Yes
P0MAT.4
ADC0.2
INT0.4
CMP0P.2
INT1.4
CMP0N.2
UART0_TX
CLU0A.10
CLU1A.8
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EFM8BB3 Data Sheet
Pin Definitions
Pin
Pin Name
Description
Crossbar Capability
Additional Digital
Functions
Analog Functions
P0.3
Multifunction I/O
Yes
P0MAT.3
XTAL2
Number
30
EXTCLK
INT0.3
INT1.3
CLU0B.9
CLU2B.10
CLU3A.9
31
P0.2
Multifunction I/O
Yes
P0MAT.2
XTAL1
INT0.2
ADC0.1
INT1.2
CMP0P.1
CLU0OUT
CMP0N.1
CLU0A.9
CLU2B.8
CLU3A.8
32
P0.1
Multifunction I/O
Yes
P0MAT.1
ADC0.0
INT0.1
CMP0P.0
INT1.1
CMP0N.0
CLU0B.8
AGND
CLU2A.9
CLU3B.9
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EFM8BB3 Data Sheet
Pin Definitions
P0.5
P0.6
20
P1.0
GND
3
17
P1.1
VDD / VIO
4
16
P1.2
RSTb / C2CK
5
15
GND
P3.0 / C2D
6
GND
14
P1.3
P2.3
7
11
21
18
13
P1.4
P1.6
P0.4
2
10
22
P0.0
P2.0
P0.3
23
P0.7
9
19
P2.1
P0.2
1
P0.1
24
6.3 EFM8BB3x-QFN24 Pin Definitions
24 pin QFN
12
P1.5
P2.2
8
(Top View)
Figure 6.3. EFM8BB3x-QFN24 Pinout
Table 6.3. Pin Definitions for EFM8BB3x-QFN24
Pin
Pin Name
Description
Crossbar Capability
Additional Digital
Functions
Analog Functions
P0.1
Multifunction I/O
Yes
P0MAT.1
ADC0.0
INT0.1
CMP0P.0
INT1.1
CMP0N.0
CLU0B.8
AGND
Number
1
CLU2A.9
CLU3B.9
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EFM8BB3 Data Sheet
Pin Definitions
Pin
Pin Name
Description
Crossbar Capability
Additional Digital
Functions
Analog Functions
P0.0
Multifunction I/O
Yes
P0MAT.0
VREF
Number
2
INT0.0
INT1.0
CLU0A.8
CLU2A.8
CLU3B.8
3
GND
Ground
4
VDD / VIO
Supply Power Input
5
RSTb /
Active-low Reset /
C2CK
C2 Debug Clock
P3.0 /
Multifunction I/O /
C2D
C2 Debug Data
P2.3
Multifunction I/O
6
7
Yes
P2MAT.3
DAC3
CLU1B.15
CLU2B.15
CLU3A.15
8
P2.2
Multifunction I/O
Yes
P2MAT.2
DAC2
CLU1A.15
CLU2B.14
CLU3A.14
9
P2.1
Multifunction I/O
Yes
P2MAT.1
DAC1
CLU1B.14
CLU2A.15
CLU3B.15
10
P2.0
Multifunction I/O
Yes
P2MAT.0
DAC0
CLU1A.14
CLU2A.14
CLU3B.14
11
P1.6
Multifunction I/O
Yes
P1MAT.6
ADC0.11
CLU3OUT
CMP1P.5
CLU0A.15
CMP1N.5
CLU1B.12
CLU2A.12
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EFM8BB3 Data Sheet
Pin Definitions
Pin
Pin Name
Description
Crossbar Capability
Additional Digital
Functions
Analog Functions
P1.5
Multifunction I/O
Yes
P1MAT.5
ADC0.10
CLU2OUT
CMP1P.4
CLU0B.14
CMP1N.4
Number
12
CLU1A.13
CLU2B.13
CLU3B.11
13
P1.4
Multifunction I/O
Yes
P1MAT.4
ADC0.9
I2C0_SCL
CMP1P.3
CLU0A.14
CMP1N.3
CLU1A.12
CLU2B.12
CLU3B.10
14
P1.3
Multifunction I/O
Yes
P1MAT.3
CMP1P.2
I2C0_SDA
CMP1N.2
CLU0B.13
CLU1B.11
CLU2B.11
CLU3A.13
15
GND
Ground
16
P1.2
Multifunction I/O
Yes
P1MAT.2
ADC0.8
CLU0A.13
CLU1A.11
CLU2B.10
CLU3A.12
CLU3B.13
17
P1.1
Multifunction I/O
Yes
P1MAT.1
ADC0.7
CLU0B.12
CLU1B.10
CLU2A.11
CLU3B.12
18
P1.0
Multifunction I/O
Yes
P1MAT.0
ADC0.6
CLU0A.12
CLU1A.10
CLU2A.10
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EFM8BB3 Data Sheet
Pin Definitions
Pin
Pin Name
Description
Crossbar Capability
Additional Digital
Functions
Analog Functions
P0.7
Multifunction I/O
Yes
P0MAT.7
ADC0.5
INT0.7
CMP0P.5
INT1.7
CMP0N.5
CLU1OUT
CMP1P.1
CLU0B.11
CMP1N.1
Number
19
CLU1B.9
CLU3A.11
20
P0.6
Multifunction I/O
Yes
P0MAT.6
ADC0.4
CNVSTR
CMP0P.4
INT0.6
CMP0N.4
INT1.6
CMP1P.0
CLU0A.11
CMP1N.0
CLU1B.8
CLU3A.10
21
P0.5
Multifunction I/O
Yes
P0MAT.5
ADC0.3
INT0.5
CMP0P.3
INT1.5
CMP0N.3
UART0_RX
CLU0B.10
CLU1A.9
22
P0.4
Multifunction I/O
Yes
P0MAT.4
ADC0.2
INT0.4
CMP0P.2
INT1.4
CMP0N.2
UART0_TX
CLU0A.10
CLU1A.8
23
P0.3
Multifunction I/O
Yes
P0MAT.3
XTAL2
EXTCLK
INT0.3
INT1.3
CLU0B.9
CLU2B.10
CLU3A.9
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Preliminary Rev. 0.2 | 43
EFM8BB3 Data Sheet
Pin Definitions
Pin
Pin Name
Description
Crossbar Capability
Additional Digital
Functions
Analog Functions
P0.2
Multifunction I/O
Yes
P0MAT.2
XTAL1
INT0.2
ADC0.1
INT1.2
CMP0P.1
CLU0OUT
CMP0N.1
Number
24
CLU0A.9
CLU2B.8
CLU3A.8
Center
GND
Ground
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Preliminary Rev. 0.2 | 44
EFM8BB3 Data Sheet
Pin Definitions
6.4 EFM8BB3x-QSOP24 Pin Definitions
P0.3
1
24
P0.4
P0.2
2
23
P0.5
P0.1
3
22
P0.6
P0.0
4
21
P0.7
GND
5
20
P1.0
VDD / VIO
6
19
P1.1
RSTb / C2CK
7
18
P1.2
P3.0 / C2D
8
17
P1.3
P2.3
9
16
P1.4
P2.2
10
15
P1.5
P2.1
11
14
P1.6
P2.0
12
13
P1.7
24 pin QSOP
(Top View)
Figure 6.4. EFM8BB3x-QSOP24 Pinout
Table 6.4. Pin Definitions for EFM8BB3x-QSOP24
Pin
Pin Name
Description
Crossbar Capability
Additional Digital
Functions
Analog Functions
P0.3
Multifunction I/O
Yes
P0MAT.3
XTAL2
Number
1
EXTCLK
INT0.3
INT1.3
CLU0B.9
CLU2B.10
CLU3A.9
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EFM8BB3 Data Sheet
Pin Definitions
Pin
Pin Name
Description
Crossbar Capability
Additional Digital
Functions
Analog Functions
P0.2
Multifunction I/O
Yes
P0MAT.2
XTAL1
INT0.2
ADC0.1
INT1.2
CMP0P.1
CLU0OUT
CMP0N.1
Number
2
CLU0A.9
CLU2B.8
CLU3A.8
3
P0.1
Multifunction I/O
Yes
P0MAT.1
ADC0.0
INT0.1
CMP0P.0
INT1.1
CMP0N.0
CLU0B.8
AGND
CLU2A.9
CLU3B.9
4
P0.0
Multifunction I/O
Yes
P0MAT.0
VREF
INT0.0
INT1.0
CLU0A.8
CLU2A.8
CLU3B.8
5
GND
Ground
6
VDD / VIO
Supply Power Input
7
RSTb /
Active-low Reset /
C2CK
C2 Debug Clock
P3.0 /
Multifunction I/O /
C2D
C2 Debug Data
P2.3
Multifunction I/O
8
9
Yes
P2MAT.3
DAC3
CLU1B.15
CLU2B.15
CLU3A.15
10
P2.2
Multifunction I/O
Yes
P2MAT.2
DAC2
CLU1A.15
CLU2B.14
CLU3A.14
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Preliminary Rev. 0.2 | 46
EFM8BB3 Data Sheet
Pin Definitions
Pin
Pin Name
Description
Crossbar Capability
Additional Digital
Functions
Analog Functions
P2.1
Multifunction I/O
Yes
P2MAT.1
DAC1
Number
11
CLU1B.14
CLU2A.15
CLU3B.15
12
P2.0
Multifunction I/O
Yes
P2MAT.0
DAC0
CLU1A.14
CLU2A.14
CLU3B.14
13
P1.7
Multifunction I/O
Yes
P1MAT.7
ADC0.12
CLU0B.15
CMP1P.6
CLU1B.13
CMP1N.6
CLU2A.13
14
P1.6
Multifunction I/O
Yes
P1MAT.6
ADC0.11
CLU3OUT
CMP1P.5
CLU0A.15
CMP1N.5
CLU1B.12
CLU2A.12
15
P1.5
Multifunction I/O
Yes
P1MAT.5
ADC0.10
CLU2OUT
CMP1P.4
CLU0B.14
CMP1N.4
CLU1A.13
CLU2B.13
CLU3B.11
16
P1.4
Multifunction I/O
Yes
P1MAT.4
ADC0.9
I2C0_SCL
CMP1P.3
CLU0A.14
CMP1N.3
CLU1A.12
CLU2B.12
CLU3B.10
17
P1.3
Multifunction I/O
Yes
P1MAT.3
CMP1P.2
I2C0_SDA
CMP1N.2
CLU0B.13
CLU1B.11
CLU2B.11
CLU3A.13
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Preliminary Rev. 0.2 | 47
EFM8BB3 Data Sheet
Pin Definitions
Pin
Pin Name
Description
Crossbar Capability
Additional Digital
Functions
Analog Functions
P1.2
Multifunction I/O
Yes
P1MAT.2
ADC0.8
Number
18
CLU0A.13
CLU1A.11
CLU2B.10
CLU3A.12
CLU3B.13
19
P1.1
Multifunction I/O
Yes
P1MAT.1
ADC0.7
CLU0B.12
CLU1B.10
CLU2A.11
CLU3B.12
20
P1.0
Multifunction I/O
Yes
P1MAT.0
ADC0.6
CLU0A.12
CLU1A.10
CLU2A.10
21
P0.7
Multifunction I/O
Yes
P0MAT.7
ADC0.5
INT0.7
CMP0P.5
INT1.7
CMP0N.5
CLU1OUT
CMP1P.1
CLU0B.11
CMP1N.1
CLU1B.9
CLU3A.11
22
P0.6
Multifunction I/O
Yes
P0MAT.6
ADC0.4
CNVSTR
CMP0P.4
INT0.6
CMP0N.4
INT1.6
CMP1P.0
CLU0A.11
CMP1N.0
CLU1B.8
CLU3A.10
23
P0.5
Multifunction I/O
Yes
P0MAT.5
ADC0.3
INT0.5
CMP0P.3
INT1.5
CMP0N.3
UART0_RX
CLU0B.10
CLU1A.9
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Preliminary Rev. 0.2 | 48
EFM8BB3 Data Sheet
Pin Definitions
Pin
Pin Name
Description
Crossbar Capability
Additional Digital
Functions
Analog Functions
P0.4
Multifunction I/O
Yes
P0MAT.4
ADC0.2
INT0.4
CMP0P.2
INT1.4
CMP0N.2
Number
24
UART0_TX
CLU0A.10
CLU1A.8
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Preliminary Rev. 0.2 | 49
EFM8BB3 Data Sheet
QFN32 Package Specifications
7. QFN32 Package Specifications
7.1 QFN32 Package Dimensions
Figure 7.1. QFN32 Package Drawing
Table 7.1. QFN32 Package Dimensions
Dimension
Min
Typ
Max
A
0.45
0.50
0.55
A1
0.00
0.035
0.05
b
0.15
0.20
0.25
D
D2
4.00 BSC.
2.80
2.90
e
0.40 BSC.
E
4.00 BSC.
3.00
E2
2.80
2.90
3.00
L
0.20
0.30
0.40
aaa
—
—
0.10
bbb
—
—
0.10
ccc
—
—
0.08
ddd
—
—
0.10
eee
—
—
0.10
ggg
—
—
0.05
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EFM8BB3 Data Sheet
QFN32 Package Specifications
Dimension
Min
Typ
Max
Note:
1. All dimensions shown are in millimeters (mm) unless otherwise noted.
2. Dimensioning and Tolerancing per ANSI Y14.5M-1994.
3. This drawing conforms to JEDEC Solid State Outline MO-220.
4. Recommended card reflow profile is per the JEDEC/IPC J-STD-020C specification for Small Body Components.
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Preliminary Rev. 0.2 | 51
EFM8BB3 Data Sheet
QFN32 Package Specifications
7.2 QFN32 PCB Land Pattern
Figure 7.2. QFN32 PCB Land Pattern Drawing
Table 7.2. QFN32 PCB Land Pattern Dimensions
Dimension
Min
Max
C1
—
4.00
C2
—
4.00
X1
—
0.2
X2
—
2.8
Y1
—
0.75
Y2
—
2.8
e
—
0.4
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Preliminary Rev. 0.2 | 52
EFM8BB3 Data Sheet
QFN32 Package Specifications
Dimension
Min
Max
Note:
1. All dimensions shown are in millimeters (mm) unless otherwise noted.
2. Dimensioning and Tolerancing is per the ANSI Y14.5M-1994 specification.
3. This Land Pattern Design is based on the IPC-7351 guidelines.
4. All dimensions shown are at Maximum Material Condition (MMC). Least Material Condition (LMC) is calculated based on a Fabrication Allowance of 0.05mm.
5. All metal pads are to be non-solder mask defined (NSMD). Clearance between the solder mask and the metal pad is to be 60 µm
minimum, all the way around the pad.
6. A stainless steel, laser-cut and electro-polished stencil with trapezoidal walls should be used to assure good solder paste release.
7. The stencil thickness should be 0.125 mm (5 mils).
8. The ratio of stencil aperture to land pad size should be 1:1 for all perimeter pads.
9. A 2 x 2 array of 1.10 mm square openings on a 1.30 mm pitch should be used for the center pad.
10. A No-Clean, Type-3 solder paste is recommended.
11. The recommended card reflow profile is per the JEDEC/IPC J-STD-020 specification for Small Body Components.
7.3 QFN32 Package Marking
EFM8
PPPPPPPP
YYWW
TTTTTT #
Figure 7.3. QFN32 Package Marking
The package marking consists of:
• PPPPPPPP – The part number designation.
• TTTTTT – A trace or manufacturing code.
• YY – The last 2 digits of the assembly year.
• WW – The 2-digit workweek when the device was assembled.
• # – The device revision (A, B, etc.).
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Preliminary Rev. 0.2 | 53
EFM8BB3 Data Sheet
QFP32 Package Specifications
8. QFP32 Package Specifications
8.1 QFP32 Package Dimensions
Figure 8.1. QFP32 Package Drawing
Table 8.1. QFP32 Package Dimensions
Dimension
Min
Typ
Max
A
—
—
1.20
A1
0.05
—
0.15
A2
0.95
1.00
1.05
b
0.30
0.37
0.45
c
0.09
—
0.20
D
9.00 BSC
D1
7.00 BSC
e
0.80 BSC
E
9.00 BSC
E1
7.00 BSC
L
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0.50
0.60
0.70
Preliminary Rev. 0.2 | 54
EFM8BB3 Data Sheet
QFP32 Package Specifications
Dimension
Min
Typ
aaa
0.20
bbb
0.20
ccc
0.10
ddd
0.20
theta
0°
Max
3.5°
7°
Note:
1. All dimensions shown are in millimeters (mm) unless otherwise noted.
2. Dimensioning and Tolerancing per ANSI Y14.5M-1994.
3. This drawing conforms to JEDEC outline MS-026.
4. Recommended card reflow profile is per the JEDEC/IPC J-STD-020 specification for Small Body Components.
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Preliminary Rev. 0.2 | 55
EFM8BB3 Data Sheet
QFP32 Package Specifications
8.2 QFP32 PCB Land Pattern
Figure 8.2. QFP32 PCB Land Pattern Drawing
Table 8.2. QFP32 PCB Land Pattern Dimensions
Dimension
Min
Max
C1
8.40
8.50
C2
8.40
8.50
E
0.80 BSC
X1
0.55
Y1
1.5
Note:
1. All dimensions shown are in millimeters (mm) unless otherwise noted.
2. This Land Pattern Design is based on the IPC-7351 guidelines.
3. All metal pads are to be non-solder mask defined (NSMD). Clearance between the solder mask and the metal pad is to be 60 µm
minimum, all the way around the pad.
4. A stainless steel, laser-cut and electro-polished stencil with trapezoidal walls should be used to assure good solder paste release.
5. The stencil thickness should be 0.125 mm (5 mils).
6. The ratio of stencil aperture to land pad size should be 1:1 for all perimeter pads.
7. A No-Clean, Type-3 solder paste is recommended.
8. The recommended card reflow profile is per the JEDEC/IPC J-STD-020C specification for Small Body Components.
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EFM8BB3 Data Sheet
QFP32 Package Specifications
8.3 QFP32 Package Marking
EFM8
PPPPPPPPPPP
YYWWTTTTTT#
e3
Figure 8.3. QFP32 Package Marking
The package marking consists of:
• PPPPPPPP – The part number designation.
• TTTTTT – A trace or manufacturing code.
• YY – The last 2 digits of the assembly year.
• WW – The 2-digit workweek when the device was assembled.
• # – The device revision (A, B, etc.).
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EFM8BB3 Data Sheet
QFN24 Package Specifications
9. QFN24 Package Specifications
9.1 QFN24 Package Dimensions
Figure 9.1. QFN24 Package Drawing
Table 9.1. QFN24 Package Dimensions
Dimension
Min
Typ
Max
A
0.8
0.85
0.9
A1
0.00
—
0.05
A2
—
0.65
—
A3
0.203 REF
b
0.15
0.2
0.25
b1
0.25
0.3
0.35
D
3.00 BSC
E
3.00 BSC
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Preliminary Rev. 0.2 | 58
EFM8BB3 Data Sheet
QFN24 Package Specifications
Dimension
Min
Typ
e
0.40 BSC
e1
0.45 BSC
Max
J
1.60
1.70
1.80
K
1.60
1.70
1.80
L
0.35
0.40
0.45
L1
0.25
0.30
0.35
aaa
—
0.10
—
bbb
—
0.10
—
ccc
—
0.08
—
ddd
—
0.1
—
eee
—
0.1
—
Note:
1. All dimensions shown are in millimeters (mm) unless otherwise noted.
2. Dimensioning and Tolerancing per ANSI Y14.5M-1994.
3. This drawing conforms to JEDEC Solid State Outline MO-248 but includes custom features which are toleranced per supplier
designation.
4. Recommended card reflow profile is per the JEDEC/IPC J-STD-020 specification for Small Body Components.
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Preliminary Rev. 0.2 | 59
EFM8BB3 Data Sheet
QFN24 Package Specifications
9.2 QFN24 PCB Land Pattern
c
X1
Y3
Y1
f
e
Y2
C2
c
X2
C1
Figure 9.2. QFN24 PCB Land Pattern Drawing
Table 9.2. QFN24 PCB Land Pattern Dimensions
Dimension
Min
Max
C1
3.00
C2
3.00
e
0.4 REF
X1
0.20
X2
1.80
Y1
0.80
Y2
1.80
Y3
0.4
f
c
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2.50 REF
0.25
0.35
Preliminary Rev. 0.2 | 60
EFM8BB3 Data Sheet
QFN24 Package Specifications
Dimension
Min
Max
Note:
1. All dimensions shown are in millimeters (mm) unless otherwise noted.
2. Dimensioning and Tolerancing is per the ANSI Y14.5M-1994 specification.
3. This Land Pattern Design is based on the IPC-SM-782 guidelines.
4. All metal pads are to be non-solder mask defined (NSMD). Clearance between the solder mask and the metal pad is to be 60 µm
minimum, all the way around the pad.
5. A stainless steel, laser-cut and electro-polished stencil with trapezoidal walls should be used to assure good solder paste release.
6. The stencil thickness should be 0.125 mm (5 mils).
7. The ratio of stencil aperture to land pad size should be 1:1 for all perimeter pads.
8. A 2 x 1 array of 1.20 mm x 0.95 mm openings on a 1.15 mm pitch should be used for the center pad.
9. A No-Clean, Type-3 solder paste is recommended.
10. The recommended card reflow profile is per the JEDEC/IPC J-STD-020 specification for Small Body Components.
9.3 QFN24 Package Marking
PPPP
PPPPPP
TTTTTT
YYWW #
Figure 9.3. QFN24 Package Marking
The package marking consists of:
• PPPPPPPP – The part number designation.
• TTTTTT – A trace or manufacturing code.
• YY – The last 2 digits of the assembly year.
• WW – The 2-digit workweek when the device was assembled.
• # – The device revision (A, B, etc.).
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EFM8BB3 Data Sheet
QSOP24 Package Specifications
10. QSOP24 Package Specifications
10.1 QSOP24 Package Dimensions
Figure 10.1. QSOP24 Package Drawing
Table 10.1. QSOP24 Package Dimensions
Dimension
Min
Typ
Max
A
—
—
1.75
A1
0.10
—
0.25
b
0.20
—
0.30
c
0.10
—
0.25
D
8.65 BSC
E
6.00 BSC
E1
3.90 BSC
e
0.635 BSC
L
theta
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0.40
—
1.27
0º
—
8º
Preliminary Rev. 0.2 | 62
EFM8BB3 Data Sheet
QSOP24 Package Specifications
Dimension
Min
Typ
aaa
0.20
bbb
0.18
ccc
0.10
ddd
0.10
Max
Note:
1. All dimensions shown are in millimeters (mm) unless otherwise noted.
2. Dimensioning and Tolerancing per ANSI Y14.5M-1994.
3. This drawing conforms to JEDEC outline MO-137, variation AE.
4. Recommended card reflow profile is per the JEDEC/IPC J-STD-020 specification for Small Body Components.
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EFM8BB3 Data Sheet
QSOP24 Package Specifications
10.2 QSOP24 PCB Land Pattern
Figure 10.2. QSOP24 PCB Land Pattern Drawing
Table 10.2. QSOP24 PCB Land Pattern Dimensions
Dimension
Min
Max
C
5.20
5.30
E
0.635 BSC
X
0.30
0.40
Y
1.50
1.60
Note:
1. All dimensions shown are in millimeters (mm) unless otherwise noted.
2. This land pattern design is based on the IPC-7351 guidelines.
3. All metal pads are to be non-solder mask defined (NSMD). Clearance between the solder mask and the metal pad is to be 60 µm
minimum, all the way around the pad.
4. A stainless steel, laser-cut and electro-polished stencil with trapezoidal walls should be used to assure good solder paste release.
5. The stencil thickness should be 0.125 mm (5 mils).
6. The ratio of stencil aperture to land pad size should be 1:1 for all perimeter pads.
7. A No-Clean, Type-3 solder paste is recommended.
8. The recommended card reflow profile is per the JEDEC/IPC J-STD-020 specification for Small Body Components.
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EFM8BB3 Data Sheet
QSOP24 Package Specifications
10.3 QSOP24 Package Marking
EFM8
PPPPPPPP #
YYWWTTTTTT
Figure 10.3. QSOP24 Package Marking
The package marking consists of:
• PPPPPPPP – The part number designation.
• TTTTTT – A trace or manufacturing code.
• YY – The last 2 digits of the assembly year.
• WW – The 2-digit workweek when the device was assembled.
• # – The device revision (A, B, etc.).
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EFM8BB3 Data Sheet
Revision History
11. Revision History
11.1 Revision 0.1
Initial release.
11.2 Revision 0.2
Added information on the bootloader to 3.10 Bootloader.
Updated some characterization TBD values.
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Preliminary Rev. 0.2 | 66
Table of Contents
1. Feature List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2. Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3. System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1 Introduction.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
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.
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.
.
. 4
3.2 Power
.
.
.
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3.3 I/O.
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3.4 Clocking .
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3.5 Counters/Timers and PWM .
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3.6 Communications and Other Digital Peripherals .
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3.7 Analog .
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3.9 Debugging .
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3.10 Bootloader
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.12
4. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . .
13
4.1 Electrical Characteristics . . . . .
4.1.1 Recommended Operating Conditions
4.1.2 Power Consumption . . . . . .
4.1.3 Reset and Supply Monitor . . . .
4.1.4 Flash Memory . . . . . . . .
4.1.5 Power Management Timing . . .
4.1.6 Internal Oscillators. . . . . . .
4.1.7 External Clock Input . . . . . .
4.1.8 Crystal Oscillator . . . . . . .
4.1.9 ADC . . . . . . . . . . .
4.1.10 Voltage Reference . . . . . .
4.1.11 Temperature Sensor . . . . .
4.1.12 DACs . . . . . . . . . .
4.1.13 Comparators . . . . . . . .
4.1.14 Configurable Logic . . . . . .
4.1.15 Port I/O . . . . . . . . . .
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.13
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.15
.16
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.24
.25
.26
4.2 Thermal Conditions .
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.27
4.3 Absolute Maximum Ratings .
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.27
5. Typical Connection Diagrams . . . . . . . . . . . . . . . . . . . . . . . .
28
5.1 Power
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.28
5.2 Debug
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.29
5.3 Other Connections .
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.29
6. Pin Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30
6.1 EFM8BB3x-QFN32 Pin Definitions .
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.30
6.2 EFM8BB3x-QFP32 Pin Definitions .
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.35
Table of Contents
67
6.3 EFM8BB3x-QFN24 Pin Definitions .
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6.4 EFM8BB3x-QSOP24 Pin Definitions .
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7. QFN32 Package Specifications. . . . . . . . . . . . . . . . . . . . . . . .
50
7.1 QFN32 Package Dimensions
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7.2 QFN32 PCB Land Pattern
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7.3 QFN32 Package Marking .
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.53
8. QFP32 Package Specifications. . . . . . . . . . . . . . . . . . . . . . . .
54
8.1 QFP32 Package Dimensions
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8.2 QFP32 PCB Land Pattern
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8.3 QFP32 Package Marking .
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.57
9. QFN24 Package Specifications. . . . . . . . . . . . . . . . . . . . . . . .
58
9.1 QFN24 Package Dimensions
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9.2 QFN24 PCB Land Pattern
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9.3 QFN24 Package Marking .
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.61
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62
10.1 QSOP24 Package Dimensions
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.62
10.2 QSOP24 PCB Land Pattern
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.64
10.3 QSOP24 Package Marking .
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.65
11. Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
66
10. QSOP24 Package Specifications
11.1 Revision 0.1 .
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11.2 Revision 0.2 .
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.66
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
67
Table of Contents
68
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