EFM8UB11F16G-C-QFN24

EFM8 Universal Bee Family EFM8UB1 Data Sheet The EFM8UB1, part of the Universal Bee family of MCUs, is a multi-purpose line of 8-bit microcontrollers with USB feature set in small packages. KEY FEATURES • Pipelined 8-bit C8051 core with 50 MHz maximum operating frequency These devices offer high value by integrating an innovative energy-smart USB peripheral interface, charger detect circuit, 8 kV ESD protection, and enhanced high speed communication interfaces into small packages, making them ideal for space-constrained USB applications. With an efficient 8051 core and precision analog, the EFM8UB1 family is also optimal for embedded applications. • Up to 22 multifunction, 5 V tolerant I/O pins • Low Energy USB with full- and low-speed support saves up to 90% of the USB energy • USB charger detect circuit (USB-BCS 1.2 compliant) EFM8UB1 applications include the following: • Consumer electronics • Medical equipment • USB I/O controls, dongles • High-speed communication bridge • One 12-bit ADC and two analog comparators with internal voltage DAC as reference input • Five 16-bit timers • Two UARTs, SPI, SMBus/I2C master/ slave and I2C slave • Priority crossbar for flexible pin mapping Core / Memory Clock Management CIP-51 8051 Core (50 MHz) Flash Program Memory RAM Memory (2304 bytes) (up to 16 KB) Debug Interface with C2 Energy Management External CMOS Oscillator High Frequency 48 MHz RC Oscillator Internal LDO Regulator Power-On Reset Low Frequency RC Oscillator High Frequency 24.5 MHz RC Oscillator Brown-Out Detector 5 V-to 3.3 V LDO Regulator 8-bit SFR bus Serial Interfaces 2 x UART SPI I2C / SMBus USB High-Speed I2C Slave I/O Ports Timers and Triggers Analog Interfaces External Interrupts Pin Reset Timer 0/1/2 PCA/PWM ADC Comparator 0 General Purpose I/O Pin Wakeup Watchdog Timer Timer 3/4 Comparator 1 Internal Voltage Reference Security 16-bit CRC Lowest power mode with peripheral operational: Normal Idle Suspend silabs.com | Building a more connected world. Snooze Shutdown Rev. 1.3 EFM8UB1 Data Sheet Feature List 1. Feature List The EFM8UB1 highlighted features are listed below. • Core • Pipelined CIP-51 Core • Fully compatible with standard 8051 instruction set • 70% of instructions execute in 1-2 clock cycles • 50 MHz maximum operating frequency • Memory • Up to 16 KB flash memory, in-system re-programmable from firmware, including 1 KB of 64-byte sectors and 15 KB of 512-byte sectors. • Up to 2304 bytes RAM (including 256 bytes standard 8051 RAM, 1024 bytes on-chip XRAM, and 1024 bytes of USB buffer) • Power • 5 V-input LDO regulator for direct connection to USB supply • Internal LDO regulator for CPU core voltage • Power-on reset circuit and brownout detectors • I/O: Up to 22 total multifunction I/O pins • All pins 5 V tolerant under bias • Flexible peripheral crossbar for peripheral routing • 5 mA source, 12.5 mA sink allows direct drive of LEDs • Clock Sources • Internal 48 MHz oscillator with accuracy of ±1.5% standalone and ±0.25% using USB clock recovery • Internal 24.5 MHz oscillator with ±2% accuracy • Internal 80 kHz low-frequency oscillator • External CMOS clock option • Timers/Counters and PWM • 3-channel Programmable Counter Array (PCA) supporting PWM, capture/compare, and frequency output modes • 5 x 16-bit general-purpose timers • Independent watchdog timer, clocked from the low frequency oscillator • Communications and Digital Peripherals • USB 2.0-compliant full speed with integrated low-power transceiver, 4 bidirectional endpoints, and dedicated 1 KB buffer • 2 x UART, up to 3 Mbaud • SPI™ Master / Slave, up to 12 Mbps • SMBus™/I2C™ Master / Slave, up to 400 kbps • I2C High-Speed Slave, up to 3.4 Mbps • • • • • • • 16-bit CRC unit, supporting automatic CRC of flash at 256byte boundaries Analog • 12-Bit Analog-to-Digital Converter (ADC) • 2 x Low-current analog comparators with adjustable reference On-Chip, Non-Intrusive Debugging • Full memory and register inspection • Four hardware breakpoints, single-stepping Pre-loaded USB bootloader Temperature range -40 to 85 ºC Single power supply of 2.2 to 3.6 V or 3.0 to 5.25 V QSOP24, QFN28, and QFN20 packages With on-chip power-on reset, voltage supply monitor, watchdog timer, and clock oscillator, the EFM8UB1 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. The on-chip 5V-to-3.3V regulator enables operation from 2.2 V up to a 5.25 V supply. Devices are available in 28-pin QFN, 20-pin QFN, or 24-pin QSOP packages. All package options are lead-free and RoHS compliant. silabs.com | Building a more connected world. Rev. 1.3 | 2 EFM8UB1 Data Sheet Ordering Information 2. Ordering Information EFM8 UB1 0 F 16 G – A – QFN28 R Tape and Reel (Optional) Package Type Revision Temperature Grade G (-40 to +85) Flash Memory Size – 16 KB Memory Type (Flash) Family Feature Set Universal Bee 1 Family Silicon Labs EFM8 Product Line Figure 2.1. EFM8UB1 Part Numbering All EFM8UB1 family members have the following features: • CIP-51 Core running up to 50 MHz • Three Internal Oscillators (48 MHz, 24.5 MHz and 80 kHz) • USB Full/Low speed Function Controller • SMBus • I2C Slave • SPI • 2 UARTs • 3-Channel Programmable Counter Array (PWM, Clock Generation, Capture/Compare) • 5 16-bit Timers • 2 Analog Comparators • 12-bit Analog-to-Digital Converter with integrated multiplexer, voltage reference, and temperature sensor • 16-bit CRC Unit • Pre-loaded USB bootloader In addition to these features, each part number in the EFM8UB1 family has a set of features that vary across the product line. The product selection guide shows the features available on each family member. Temperature Range Package Yes — -40 to +85 °C QFN28 EFM8UB11F16G-C-QSOP24 16 2304 17 15 8 9 Yes Yes -40 to +85 °C QSOP24 EFM8UB10F16G-C-QFN20 16 2304 13 11 8 5 Yes — -40 to +85 °C QFN20 EFM8UB10F8G-C-QFN20 8 2304 13 11 8 5 Yes — -40 to +85 °C QFN20 silabs.com | Building a more connected world. and VDD Pins 12 Separate VIO Comparator 1 Inputs 10 (RoHS Compliant) Comparator 0 Inputs 20 Pb-free ADC0 Channels 22 I/Os (Total) 2304 Digital Port RAM (Bytes) 16 Part Number EFM8UB10F16G-C-QFN28 Ordering Flash Memory (kB) Table 2.1. Product Selection Guide Rev. 1.3 | 3 Table of Contents 1. Feature List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3. System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.2 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.3 I/O. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.4 Clocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.5 Counters/Timers and PWM . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.6 Communications and Other Digital Peripherals . . . . . . . . . . . . . . . . . . . 9 3.7 Analog . . . . 3.8 Reset Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 3.9 Debugging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 3.10 Bootloader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 4. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 16 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 ADC . . . . . . . . . . . . 4.1.9 Voltage Reference . . . . . . . 4.1.10 Temperature Sensor . . . . . . 4.1.11 1.8 V Internal LDO Voltage Regulator 4.1.12 5 V Voltage Regulator. . . . . . 4.1.13 Comparators . . . . . . . . . 4.1.14 Port I/O . . . . . . . . . . 4.1.15 USB Transceiver . . . . . . . 4.1.16 SMBus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 .16 .17 .19 .20 .20 .21 .21 .22 .23 .24 .24 .24 .25 .26 .27 .28 4.2 Thermal Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 4.3 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . .30 4.4 Typical Performance Curves . . . . . . . . . . . . . . . . . . . . . . . . .31 5. Typical Connection Diagrams . . . . . . . . . . . . . . . . . . . . . . . . 35 5.1 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35 5.2 USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37 5.3 Debug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39 5.4 Other Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . .39 silabs.com | Building a more connected world. Rev. 1.3 | 4 6. Pin Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 6.1 EFM8UB1x-QFN28 Pin Definitions . . . . . . . . . . . . . . . . . . . . . . .40 6.2 EFM8UB1x-QSOP24 Pin Definitions . . . . . . . . . . . . . . . . . . . . . .44 6.3 EFM8UB1x-QFN20 Pin Definitions . . . . . . . . . . . . . . . . . . . . . .47 7. QFN28 Package Specifications. . . . . . . . . . . . . . . . . . . . . . . . 50 . 7.1 QFN28 Package Dimensions . . . . . . . . . . . . . . . . . . . . . . . .50 7.2 QFN28 PCB Land Pattern . . . . . . . . . . . . . . . . . . . . . . . . .52 7.3 QFN28 Package Marking . . . . . . . . . . . . . . . . . . . . . . . . . .53 8. QSOP24 Package Specifications . . . . . . . . . . . . . . . . . . . . . . . 54 8.1 Package Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . .54 8.2 PCB Land Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . .56 8.3 Package Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57 9. QFN20 Package Specifications. . . . . . . . . . . . . . . . . . . . . . . . 58 9.1 QFN20 Package Dimensions . . . . . . . . . . . . . . . . . . . . . . . .58 9.2 QFN20 PCB Land Pattern . . . . . . . . . . . . . . . . . . . . . . . . .60 9.3 QFN20 Package Marking . . . . . . . . . . . . . . . . . . . . . . . . . .61 10. Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 silabs.com | Building a more connected world. Rev. 1.3 | 5 EFM8UB1 Data Sheet System Overview 3. System Overview 3.1 Introduction C2CK/RSTb CIP-51 8051 Controller Core Digital Peripherals 16 KB ISP Flash Program Memory Reset UART0 UART1 Power-On Reset Timers 0, 1, 2, 3, 4 256 Byte SRAM Supply Monitor Independent Watchdog Timer I2C Slave VDD VREGIN Power Net Voltage Regulators CRC SFR Bus Crossbar Control CMOS Oscillator Input Analog Peripherals Port 1 Drivers P1.n Port 2 Drivers P2.n Port 3 Drivers P3.n Internal Reference 48 MHz 1.5% Oscillator Clock Recovery P0.n SPI System Clock Configuration 24.5 MHz 2% Oscillator VDD VREF VDD GND USB Peripheral D+ DVBUS I2C / SMBus SYSCLK Port 0 Drivers Priority Crossbar Decoder 3-ch PCA 1024 Byte XRAM Low Freq. Oscillator EXTCLK Port I/O Configuration Full / Low Speed Transceiver 1 KB RAM 12/10 bit ADC AMUX Debug / C2D Programming Hardware Controller Charge Detection Low Power Temp Sensor + -+ 2 Comparators Figure 3.1. Detailed EFM8UB1 Block Diagram This section describes the EFM8UB1 family at a high level. For more information on the device packages and pinout, electrical specifications, and typical connection diagrams, see the EFM8UB1 Data Sheet. For more information on each module including register definitions, see the EFM8UB1 Reference Manual. For more information on any errata, see the EFM8UB1 Errata. silabs.com | Building a more connected world. Rev. 1.3 | 6 EFM8UB1 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 Details Mode Entry Wake-Up Sources Normal Core and all peripherals clocked and fully operational — — Set IDLE bit in PCON0 Any interrupt Idle • Core halted • All peripherals clocked and fully operational • Code resumes execution on wake event Suspend • • • • • Core and peripheral clocks halted HFOSC0 and HFOSC1 oscillators stopped Regulators 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 Stop • • • • • All internal power nets shut down 5V regulator remains active (if enabled) Internal 1.8 V LDO on Pins retain state Exit on any reset source 1. Clear STOPCF bit in REG0CN 2. Set STOP bit in PCON0 Snooze • Core and peripheral clocks halted • HFOSC0 and HFOSC1 oscillators stopped • Regulators 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 • • • • • • Shutdown • • • • • 1. Set STOPCF bit in REG0CN 2. Set STOP bit in PCON0 • RSTb pin reset • Power-on reset All internal power nets shut down 5V regulator remains active (if enabled) Internal 1.8 V LDO off to save energy Pins retain state Exit on pin or power-on reset • • • • • • USB0 Bus Activity Timer 4 Event SPI0 Activity I2C0 Slave Activity Port Match Event Comparator 0 Falling Edge Any reset source USB0 Bus Activity Timer 4 Event SPI0 Activity I2C0 Slave Activity Port Match Event Comparator 0 Falling Edge 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 P3.0 and P3.1 can be used as GPIO. Additionally, the C2 Interface Data signal (C2D) is shared with P3.0. The port control block offers the following features: • Up to 22 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. • Two direct-pin interrupt sources with dedicated interrupt vectors (INT0 and INT1). • Up to 20 direct-pin interrupt sources with shared interrupt vector (Port Match). silabs.com | Building a more connected world. Rev. 1.3 | 7 EFM8UB1 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. • 48 MHz internal oscillator (HFOSC1), accurate to ±1.5% over supply and temperature corners. • 80 kHz low-frequency oscillator (LFOSC0). • 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. • • • • • • • • • • 16-bit time base Programmable clock divisor and clock source selection Up to three 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 silabs.com | Building a more connected world. Rev. 1.3 | 8 EFM8UB1 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 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 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. • USB Start-of-Frame (SOF) 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 Serial Bus (USB0) The USB0 peripheral provides a full-speed USB 2.0 compliant device controller and PHY with additional Low Energy USB features. The device supports both full-speed (12MBit/s) and low speed (1.5MBit/s) operation, and includes a dedicated USB oscillator with clock recovery mechanism for crystal-free operation. No external components are required. The USB function controller (USB0) consists of a Serial Interface Engine (SIE), USB transceiver (including matching resistors and configurable pull-up resistors), and 1 KB FIFO block. The Low Energy Mode ensures the current consumption is optimized and enables USB communication on a strict power budget. The USB0 module includes the following features: • Full and Low Speed functionality. • Implements 4 bidirectional endpoints. • Low Energy Mode to reduce active supply current based on bus bandwidth. • USB 2.0 compliant USB peripheral support (no host capability). • Direct module access to 1 KB of RAM for FIFO memory. • Clock recovery to meet USB clocking requirements with no external components. • Charger detection circuitry with automatic detection of SDP, CDP, and DCP interfaces. • D+ and D- can be routed to ADC input to support ACM and proprietary charger architectures. silabs.com | Building a more connected world. Rev. 1.3 | 9 EFM8UB1 Data Sheet System Overview 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 FIFO on transmit and receive. 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. • Four byte FIFO 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). Four 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. silabs.com | Building a more connected world. Rev. 1.3 | 10 EFM8UB1 Data Sheet System Overview 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 FIFOs (one byte) to help increase throughput in faster applications 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 • Transmit and receive FIFOs (two bytes) to help increase throughput in faster applications 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 silabs.com | Building a more connected world. Rev. 1.3 | 11 EFM8UB1 Data Sheet System Overview 3.7 Analog 12-Bit Analog-to-Digital Converter (ADC0) The ADC is a successive-approximation-register (SAR) ADC with 12-, 10-, and 8-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. • • • • • • • • • • • Up to 20 external inputs. Single-ended 12-bit and 10-bit modes. Supports an output update rate of 200 ksps samples per second in 12-bit mode or 800 ksps samples per second in 10-bit mode. Operation in low power modes at lower conversion speeds. Asynchronous hardware conversion trigger, selectable between software, external I/O and internal timer sources. Output data window comparator allows automatic range checking. Support for burst mode, which produces one set of accumulated data per conversion-start trigger with programmable power-on settling and tracking time. Conversion complete and window compare interrupts supported. Flexible output data formatting. Includes an internal fast-settling reference with two levels (1.65 V and 2.4 V) and support for external reference and signal ground. Integrated temperature sensor. Low Current Comparators (CMP0, CMP1) Analog comparators are 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 12 (CMP1) external positive inputs • Up to 10 (CMP0) or 12 (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 silabs.com | Building a more connected world. Rev. 1.3 | 12 EFM8UB1 Data Sheet System Overview 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. The Port I/O latches are reset to 1 in open-drain mode. Weak pullups are enabled during and after the reset. 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: • 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 • USB reset 3.9 Debugging The EFM8UB1 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. silabs.com | Building a more connected world. Rev. 1.3 | 13 EFM8UB1 Data Sheet System Overview 3.10 Bootloader All devices come pre-programmed with a USB bootloader. This bootloader resides in the code security page and last pages 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. More information about the bootloader protocol and usage can be found in AN945: EFM8 Factory Bootloader User Guide. Application notes can be found on the Silicon Labs website (www.silabs.com/8bit-appnotes) or within Simplicity Studio by using the [Application Notes] tile. 0xFFC0 0xFFBF 0xFC00 Read-Only Reserved 0xFBFF Lock Byte 0xFBFE Bootloader Signature Byte Code Security Page 0xF800 0xF7FF 0x4000 0x3FFF 64 Bytes Bootloader Vector Nonvolatile Data Reserved Bootloader 0xFBC0 0xFBBF Bootloader 0xFFFF 16 KB Code (32 x 512 Byte pages) 0x0000 Reset Vector Figure 3.2. Flash Memory Map with Bootloader—16 KB Devices silabs.com | Building a more connected world. Rev. 1.3 | 14 EFM8UB1 Data Sheet System Overview Table 3.2. Summary of Pins for Bootloader Communication Bootloader Pins for Bootload Communication UART TX – P0.4 RX – P0.5 USB VBUS D+ D- Table 3.3. Summary of Pins for Bootload Mode Entry Device Package Pin for Bootload Mode Entry QFN28 P3.0 / C2D QSOP24 P2.0 / C2D QFN20 P2.0 / C2D silabs.com | Building a more connected world. Rev. 1.3 | 15 EFM8UB1 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 16, unless stated otherwise. 4.1.1 Recommended Operating Conditions Table 4.1. Recommended Operating Conditions Parameter Min Typ Max Unit 2.2 — 3.6 V Operating Supply Voltage on VIO 3 VIO 1.71 — VDD V Operating Supply Voltage on VRE- VREGIN GIN 3.0 — 5.25 V 0 — 50 MHz -40 — 85 °C Operating Supply Voltage on VDD Symbol Test Condition VDD 1 System Clock Frequency fSYSCLK Operating Ambient Temperature TA Note: 1. Standard USB compliance tests require a minimum of 3.0 V on VDD for compliant operation. 2. All voltages with respect to GND. 3. On devices without a VIO pin, VIO = VDD. 4. GPIO levels are undefined whenever VIO is less than 1 V. silabs.com | Building a more connected world. Rev. 1.3 | 16 EFM8UB1 Data Sheet Electrical Specifications 4.1.2 Power Consumption Table 4.2. Power Consumption Parameter Symbol Test Condition Min Typ Max Unit FSYSCLK = 48 MHz (HFOSC1) 2 — 9.4 10.1 mA FSYSCLK = 24.5 MHz (HFOSC0) 2 — 4.5 5.2 mA FSYSCLK = 1.53 MHz (HFOSC0) 2 — 600 — μA FSYSCLK = 80 kHz 3 — 145 — μA FSYSCLK = 48 MHz (HFOSC1) 2 — 6.3 6.8 mA FSYSCLK = 24.5 MHz (HFOSC0) 2 — 2.9 3.3 mA FSYSCLK = 1.53 MHz (HFOSC0) 2 — 440 — μA FSYSCLK = 80 kHz 3 — 130 — μA LFO Running — 125 — μA LFO Stopped — 120 — μA LFO Running — 25 — μA LFO Stopped — 20 — 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 — μA Shutdown Mode—Core halted and all clocks stopped,Internal LDO Off, Supply monitor off. IDD — 0.2 — μA — 105 — μA — 850 — μA — 4 — 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 48 MHz, TA = 25 °C Low-Frequency Oscillator ILFOSC Operating at 80 kHz, TA = 25 °C silabs.com | Building a more connected world. Rev. 1.3 | 17 EFM8UB1 Data Sheet Electrical Specifications Parameter ADC0 Always-on 4 Symbol Test Condition Min Typ Max Unit IADC 800 ksps, 10-bit conversions or — 820 1200 μA — 405 580 μA 200 ksps, VDD = 3.0 V — 370 — μA 100 ksps, VDD = 3.0 V — 185 — μA 10 ksps, VDD = 3.0 V — 20 — μA 200 ksps, VDD = 3.0 V — 485 — μA 100 ksps, VDD = 3.0 V — 245 — μA 10 ksps, VDD = 3.0 V — 25 — μA 100 ksps, VDD = 3.0 V — 505 — μA 50 ksps, VDD = 3.0 V — 255 — μA 10 ksps, VDD = 3.0 V — 50 — μA 100 ksps, VDD = 3.0 V, — 950 — μA — 415 — μA — 80 — μA Normal Power Mode — 680 790 μA Low Power Mode — 170 210 μA — 70 120 μA CPMD = 11 — 0.5 — μA CPMD = 10 — 3 — μA CPMD = 01 — 8.5 — μA CPMD = 00 — 22.5 — μA 200 ksps, 12-bit conversions Normal bias settings VDD = 3.0 V 250 ksps, 10-bit conversions or 62.5 ksps 12-bit conversions Low power bias settings VDD = 3.0 V ADC0 Burst Mode, 10-bit single conversions, external reference ADC0 Burst Mode, 10-bit single conversions, internal reference, Low power bias settings ADC0 Burst Mode, 12-bit single conversions, external reference ADC0 Burst Mode, 12-bit single conversions, internal reference IADC IADC IADC IADC Normal bias 50 ksps, VDD = 3.0 V, Low power bias 10 ksps, VDD = 3.0 V, Low power bias Internal ADC0 Reference, Alwayson 5 IVREFFS Temperature Sensor ITSENSE Comparator 0 (CMP0, CMP1) ICMP Comparator Reference6 ICPREF — 1.2 — μA Voltage Supply Monitor (VMON0) IVMON — 15 20 μA silabs.com | Building a more connected world. Rev. 1.3 | 18 EFM8UB1 Data Sheet Electrical Specifications Parameter 5V Regulator Symbol Test Condition Min Typ Max Unit IVREG Normal Mode — 245 340 μA — 60 100 μA — 2.5 10 μA — 2.5 — nA Low Energy Mode, 64 byte 1ms IN Interrupt transfers — 850 — μA Low Energy Mode, 64 byte 1ms OUT Interrupt transfers — 250 — μA Low Energy Mode, Idle (SOF only) — 50 — μA (SUSEN = 0, BIASENB = 0) Suspend Mode (SUSEN = 1, BIASENB = 0) Bias Disabled (BIASENB = 1) Disabled (BIASENB = 1, REG1ENB = 1) USB (USB0) Full-Speed IUSB 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 always-on power excludes internal reference supply current. 5. The internal reference is enabled as-needed when operating the ADC in burst mode to save power. 6. This value is the current sourced from the pin or supply selected as the full-scale reference to the comparator DAC. 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 1.95 2.05 2.15 V Rising Voltage on VDD — 1.2 — 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 silabs.com | Building a more connected world. FSYSCLK >1 MHz Rev. 1.3 | 19 EFM8UB1 Data Sheet Electrical Specifications 4.1.4 Flash Memory Table 4.4. Flash Memory Parameter Min Typ Max Units 19 20 21 μs 5.2 5.35 5.5 ms VDD Voltage During Programming 3 VPROG 2.2 — 3.6 V Endurance (Write/Erase Cycles) 20k 100k — Cycles — 5.5 — µs Write Time1 , 2 Symbol Test Condition tWRITE One Byte, FSYSCLK = 24.5 MHz Erase Time1 , 2 tERASE One Page, FSYSCLK = 24.5 MHz CRC Calculation Time NWE tCRC One 256-Byte Block SYSCLK = 48 MHz 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 Test Condition Idle Mode Wake-up Time tIDLEWK Suspend Mode Wake-up Time tSUS- SYSCLK = HFOSC0 PENDWK CLKDIV = 0x00 tSLEEPWK SYSCLK = HFOSC0 Snooze Mode Wake-up Time Min Typ Max Units 2 — 3 SYSCLKs — 170 — ns — 12 — µs CLKDIV = 0x00 silabs.com | Building a more connected world. Rev. 1.3 | 20 EFM8UB1 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 47.3 48 48.7 MHz — 0.02 — %/V TSHFOSC1 VDD = 3.0 V — 45 — 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 fCMOS 0 — 50 MHz External Input CMOS Clock High Time tCMOSH 9 — — ns External Input CMOS Clock Low Time tCMOSL 9 — — ns C0 Temperature Sensitivity TSHFOSC0 VDD = 3.0 V High Frequency Oscillator 1 (48 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 External Input CMOS Clock Symbol Test Condition Frequency (at EXTCLK pin) silabs.com | Building a more connected world. Rev. 1.3 | 21 EFM8UB1 Data Sheet Electrical Specifications 4.1.8 ADC Table 4.8. ADC Parameter Resolution Throughput Rate Symbol Test Condition Nbits 12 Bit Mode 12 Bits 10 Bit Mode 10 Bits fS (High Speed Mode) Throughput Rate fS (Low Power Mode) Tracking Time tTRK Power-On Time tPWR SAR Clock Frequency fSAR Min Typ Max Unit 12 Bit Mode — — 200 ksps 10 Bit Mode — — 800 ksps 12 Bit Mode — — 62.5 ksps 10 Bit Mode — — 250 ksps High Speed Mode 230 — — ns Low Power Mode 450 — — ns 1.2 — — μs — — 6.25 MHz — — 12.5 MHz — — 4 MHz High Speed Mode, Reference is 2.4 V internal High Speed Mode, Reference is not 2.4 V internal Low Power Mode Conversion Time tCNV 10-Bit Conversion, 1.1 μs SAR Clock = 12.25 MHz, System Clock = 24.5 MHz. Sample/Hold Capacitor CSAR Gain = 1 — 5 — pF Gain = 0.5 — 2.5 — pF Input Pin Capacitance CIN — 20 — pF Input Mux Impedance RMUX — 550 — Ω Voltage Reference Range VREF 1 — VDD V Input Voltage Range 1 VIN Gain = 1 0 — VREF V Gain = 0.5 0 — 2xVREF V — 70 — dB 12 Bit Mode — ±1 ±2.3 LSB 10 Bit Mode — ±0.2 ±0.6 LSB 12 Bit Mode -1 ±0.7 1.9 LSB 10 Bit Mode — ±0.2 ±0.6 LSB 12 Bit Mode, VREF = 1.65 V -3 0 3 LSB 10 Bit Mode, VREF = 1.65 V -2 0 2 LSB — 0.004 — LSB/°C Power Supply Rejection Ratio PSRRADC DC Performance Integral Nonlinearity INL Differential Nonlinearity (Guaranteed Monotonic) DNL Offset Error EOFF Offset Temperature Coefficient TCOFF silabs.com | Building a more connected world. Rev. 1.3 | 22 EFM8UB1 Data Sheet Electrical Specifications Parameter Slope Error Symbol Test Condition Min Typ Max Unit EM 12 Bit Mode — ±0.02 ±0.1 % 10 Bit Mode — ±0.06 ±0.24 % Dynamic Performance 10 kHz Sine Wave Input 1dB 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 61 66 — dB 10 Bit Mode 53 60 — dB 12 Bit Mode 61 66 — dB 10 Bit Mode 53 60 — dB 12 Bit Mode — 71 — dB 10 Bit Mode — 70 — dB 12 Bit Mode — -79 — dB 10 Bit Mode — -70 — dB Note: 1. Absolute input pin voltage is limited by the VDD supply. 4.1.9 Voltage Reference Table 4.9. Voltage Reference Parameter Symbol Test Condition Min Typ Max Unit VREFFS 1.65 V Setting 1.62 1.65 1.68 V 2.4 V Setting, VDD > 2.6 V 2.35 2.4 2.45 V Internal Fast Settling Reference Output Voltage (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 — 8 — μA FS External Reference Input Current IEXTREF silabs.com | Building a more connected world. Sample Rate = 800 ksps; VREF = 3.0 V Rev. 1.3 | 23 EFM8UB1 Data Sheet Electrical Specifications 4.1.10 Temperature Sensor Table 4.10. Temperature Sensor Parameter Symbol Test Condition Min Typ Max Unit Offset VOFF TA = 0 °C — 757 — mV Offset Error 1 EOFF TA = 0 °C — 17 — mV Slope M — 2.85 — mV/°C Slope Error 1 EM — 70 — μV/° Linearity — 0.5 — °C Turn-on Time — 1.8 — μs Min Typ Max Unit 1.78 1.85 1.92 V Min Typ Max Unit 3.0 — 5.25 V 3.1 3.3 3.6 V — VREGIN – VDROPOUT — V Note: 1. Represents one standard deviation from the mean. 4.1.11 1.8 V Internal LDO Voltage Regulator Table 4.11. 1.8V Internal LDO Voltage Regulator Parameter Output Voltage Symbol Test Condition VOUT_1.8V 4.1.12 5 V Voltage Regulator Table 4.12. 5V Voltage Regulator Parameter Symbol Input Voltage Range 1 VREGIN Output Voltage on VDD 2 VREGOUT Test Condition Output Current = 1 to 100 mA Regulation range (VREGIN ≥ 4.1V) Output Current = 1 to 100 mA Dropout range (VREGIN < 4.1V) Output Current 2 IREGOUT — — 100 mA Dropout Voltage VDROPOUT Output Current = 100 mA — — 0.8 V Note: 1. Input range to meet the Output Voltage on VDD specification. If the 5 V voltage regulator is not used, VREGIN should be tied to VDD. 2. Output current is total regulator output, including any current required by the device. silabs.com | Building a more connected world. Rev. 1.3 | 24 EFM8UB1 Data Sheet Electrical Specifications 4.1.13 Comparators Table 4.13. Comparators Parameter Min Typ Max Unit +100 mV Differential, VCM = 1.65 V — 110 — ns -100 mV Differential, VCM = 1.65 V — 160 — ns Response Time, CPMD = 11 (Low- tRESP3 est Power) +100 mV Differential, VCM = 1.65 V — 1.2 — μs -100 mV Differential, VCM = 1.65 V — 4.5 — 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 — 1.5 — mV CPHYP = 01 — 4 — mV CPHYP = 10 — 8 — mV CPHYP = 11 — 16 — mV CPHYN = 00 — -1.5 — mV CPHYN = 01 — -4 — mV CPHYN = 10 — -8 — mV CPHYN = 11 — -16 — mV -0.25 — VDD+0.25 V VDD V Response Time, CPMD = 00 (Highest Speed) Symbol Test Condition tRESP0 HYSCP+ Mode 0 (CPMD = 00) Negative Hysteresis HYSCP- Mode 0 (CPMD = 00) Positive Hysteresis HYSCP+ Mode 3 (CPMD = 11) Negative Hysteresis HYSCP- Mode 3 (CPMD = 11) Input Range (CP+ or CP-) VIN Direct comparator input Reference DAC input 1.2 Reference DAC Resolution Nbits Reference DAC Input Impedance RCPREF — 2.75 — MΩ Input Pin Capacitance CCP — 7.5 — pF 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/° silabs.com | Building a more connected world. 6 TA = 25 °C bits Rev. 1.3 | 25 EFM8UB1 Data Sheet Electrical Specifications 4.1.14 Port I/O Table 4.14. Port I/O Parameter Min Typ Max Unit 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 VIH VIO - 0.6 — — V VIL — — 0.6 V Pin Capacitance CIO — 7 — pF Weak Pull-Up Current IPU VIO = 3.6 -30 -20 -10 μA Input Leakage (Pullups off or Analog) ILK GND < VIN < VIO -1.1 — 1.1 μA Input Leakage Current with VIN above VIO ILK VIO < VIN < VIO+2.0 V 0 5 150 μA Output High Voltage (High Drive)1 Symbol Test Condition VOH IOH = -1.8 mA, 1.71 V ≤ VIO < 2.2 V Output Low Voltage (High Drive)1 VOL IOL = 3.6 mA, 1.71 V ≤ VIO < 2.2 V Output High Voltage (Low Drive)1 VOH IOH = -1.2 mA, 1.71 V ≤ VIO < 2.2 V Output Low Voltage (Low Drive)1 VOL IOL = 1.8 mA, 1.71 V ≤ VIO < 2.2 V Input High Voltage (all port pins including VBUS) Input Low Voltage (all port pins including VBUS) (VIN = 0 V) Note: 1. See Figure 4.7 Typical VOH Curves on page 34 and Figure 4.8 Typical VOL Curves on page 34 for more information. silabs.com | Building a more connected world. Rev. 1.3 | 26 EFM8UB1 Data Sheet Electrical Specifications 4.1.15 USB Transceiver Table 4.15. USB Transceiver Parameter Symbol Test Condition Min Typ Max Unit Output High Voltage VOH VDD ≥3.0V 2.8 — — V Output Low Voltage VOL VDD ≥3.0V — — 0.8 V Output Crossover Point VCRS 1.3 — 2.0 V Output Impedance ZDRV Driving High 28 36 44 Ω Driving Low 28 36 44 1.425 1.5 1.575 kΩ Low Speed 75 — 300 ns Full Speed 4 — 20 ns Low Speed 75 — 300 ns Full Speed 4 — 20 ns 0.2 — — V 0.8 — 2.5 V — 3.3 V GND-0.3 5.8 V VIO < 3.3 V GND-0.3 VIO+2.5 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 Operating Junction Temperature TJ -40 105 °C Note: 1. Exposure to maximum rating conditions for extended periods may affect device reliability. 2. On devices without a VIO pin, VIO = VDD silabs.com | Building a more connected world. Rev. 1.3 | 30 EFM8UB1 Data Sheet Electrical Specifications 4.4 Typical Performance Curves Figure 4.2. Typical Operating Supply Current using HFOSC0 Figure 4.3. Typical Operating Supply Current using HFOSC1 silabs.com | Building a more connected world. Rev. 1.3 | 31 EFM8UB1 Data Sheet Electrical Specifications Figure 4.4. Typical Operating Supply Current using LFOSC Figure 4.5. Typical ADC0 and Internal Reference Supply Current in Burst Mode silabs.com | Building a more connected world. Rev. 1.3 | 32 EFM8UB1 Data Sheet Electrical Specifications Figure 4.6. Typical ADC0 Supply Current in Normal (always-on) Mode silabs.com | Building a more connected world. Rev. 1.3 | 33 EFM8UB1 Data Sheet Electrical Specifications Figure 4.7. Typical VOH Curves Figure 4.8. Typical VOL Curves silabs.com | Building a more connected world. Rev. 1.3 | 34 EFM8UB1 Data Sheet Typical Connection Diagrams 5. Typical Connection Diagrams 5.1 Power The figure below shows a typical connection diagram for the power pins of the EFM8UB1 devices when the internal regulator used and USB is connected (bus-powered). EFM8UB1 Device USB 5 V (in) 4.7 µF and 0.1 µF bypass capacitors required for each power pin placed as close to the pins as possible. 3.3 V (out) VREGIN Voltage Regulator VDD GND Figure 5.1. Connection Diagram with Voltage Regulator Used and USB Connected (Bus-Powered) silabs.com | Building a more connected world. Rev. 1.3 | 35 EFM8UB1 Data Sheet Typical Connection Diagrams The figure below shows a typical connection diagram for the power pins of the EFM8UB1 devices when the internal regulator used and USB is connected (self-powered). EFM8UB1 Device 3.6-5.25 V (in) 4.7 µF and 0.1 µF bypass capacitors required for each power pin placed as close to the pins as possible. 3.3 V (out) VREGIN Voltage Regulator VDD GND Figure 5.2. Connection Diagram with Voltage Regulator Used and USB Connected (Self-Powered) The figure below shows a typical connection diagram for the power pins of the EFM8UB1 devices when the internal 5 V-to-3.3 V regulator is not used. EFM8UB1 Device 2.2-3.6 V (in) VREGIN 4.7 µF and 0.1 µF bypass capacitors required for each power pin placed as close to the pins as possible. Voltage Regulator VDD GND Figure 5.3. Connection Diagram with Voltage Regulator Not Used (Self-Powered) silabs.com | Building a more connected world. Rev. 1.3 | 36 EFM8UB1 Data Sheet Typical Connection Diagrams 5.2 USB Figure 5.4 Bus-Powered Connection Diagram for USB Pins on page 37 shows a typical connection bus-powered diagram for the USB pins of the EFM8UB1 devices including ESD protection diodes on the USB pins. Bypass capacitors on VREGIN and VDD are required as discussed in 5.1 Power, but are not shown in the figure. Note: The VBUS pin is not required as a sensing pin for proper operation in bus-powered configurations. Rather than using VBUS as a sensing pin, it is recommended to use the VBUS pin only as a GPIO by clearing VBUSEN and VBUSIE to 0 in the USB0CF register. To do this using the USB stack, set the device to use bus-powered mode. EFM8UB1 Device VBUS USB Connector VREGIN D+ D+ D- USB D- Signal GND SP0503BAHT or equivalent USB ESD protection diodes (Recommended) GND Figure 5.4. Bus-Powered Connection Diagram for USB Pins silabs.com | Building a more connected world. Rev. 1.3 | 37 EFM8UB1 Data Sheet Typical Connection Diagrams Figure 5.5 Self-Powered Connection Diagram for USB Pins on page 38 shows a typical connection self-powered diagram for the USB pins of the EFM8UB1 devices including ESD protection diodes on the USB pins. Note: There are two relevant restrictions on the VBUS pin voltage in this self-powered configuration. The first is the absolute maximum voltage on the VBUS pin, which is defined as VIO + 2.5 V in Table 4.19 Absolute Maximum Ratings on page 30. The second is the Input High Voltage (VIH) for VBUS to detect when the device is connected to a bus, which is defined as VIO – 0.6 V in 4.1.14 Port I/O. For self-powered systems where VDD and VIO may be unpowered when VBUS is connected to 4.4 V to 5.5 V, a resistor divider (or functionally-equivalent circuit) on VBUS is required to meet these specifications and ensure reliable device operation. In this case, the current limitation of the resistor divider prevents overstress on the pin, even though the VIO + 2.5 V specification is not strictly met. 22.1 kΩ EFM8UB1 Device 47.5 kΩ VBUS USB Connector P3.1 / VBUS D+ D+ D- USB D- Signal GND SP0503BAHT or equivalent USB ESD protection diodes (Recommended) GND Figure 5.5. Self-Powered Connection Diagram for USB Pins silabs.com | Building a more connected world. Rev. 1.3 | 38 EFM8UB1 Data Sheet Typical Connection Diagrams 5.3 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 AN124: 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. VDD EFM8UB1 Device C2CK 1k 1k External System 1k (if pin sharing) C2D (if pin sharing) 1k 1k GND Debug Adapter Figure 5.6. Debug Connection Diagram 5.4 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). silabs.com | Building a more connected world. Rev. 1.3 | 39 EFM8UB1 Data Sheet Pin Definitions 6. Pin Definitions P0.2 P0.3 P0.4 P0.5 P0.6 P0.7 P1.0 28 27 26 25 24 23 22 6.1 EFM8UB1x-QFN28 Pin Definitions P0.1 1 21 P1.1 P0.0 2 20 P1.2 GND 3 19 P1.3 D+ 4 18 P1.4 D- 5 17 P1.5 VDD 6 16 P1.6 VREGIN 7 15 P1.7 28 pin QFN (Top View) 9 10 11 12 13 14 RSTb / C2CK P3.0 / C2D P2.3 P2.2 P2.1 P2.0 P3.1 / VBUS 8 GND Figure 6.1. EFM8UB1x-QFN28 Pinout silabs.com | Building a more connected world. Rev. 1.3 | 40 EFM8UB1 Data Sheet Pin Definitions Table 6.1. Pin Definitions for EFM8UB1x-QFN28 Pin Pin Name Description Crossbar Capability Additional Digital Functions Analog Functions P0.1 Multifunction I/O Yes P0MAT.1 ADC0.1 INT0.1 CMP0P.1 INT1.1 CMP0N.1 Number 1 AGND 2 P0.0 Multifunction I/O Yes P0MAT.0 ADC0.0 INT0.0 CMP0P.0 INT1.0 CMP0N.0 VREF 3 GND Ground 4 D+ USB Data Positive ADC0.28 5 D- USB Data Negative ADC0.29 6 VDD Supply Power Input / 5V Regulator Output 7 VREGIN 5V Regulator Input 8 P3.1 Multifunction I/O 9 RST / Active-low Reset / C2CK C2 Debug Clock P3.0 / Multifunction I/O / C2D C2 Debug Data P2.3 Multifunction I/O 10 11 VBUS Yes P2MAT.3 ADC0.23 CMP1P.12 CMP1N.12 12 P2.2 Multifunction I/O Yes P2MAT.2 ADC0.22 CMP1P.11 CMP1N.11 13 P2.1 Multifunction I/O Yes P2MAT.1 ADC0.21 CMP1P.10 CMP1N.10 14 P2.0 Multifunction I/O Yes P2MAT.0 ADC0.20 CMP1P.9 CMP1N.9 15 P1.7 Multifunction I/O Yes P1MAT.7 ADC0.15 CMP1P.7 CMP1N.7 silabs.com | Building a more connected world. Rev. 1.3 | 41 EFM8UB1 Data Sheet Pin Definitions Pin Pin Name Description Crossbar Capability Additional Digital Functions Analog Functions P1.6 Multifunction I/O Yes P1MAT.6 ADC0.14 I2C0_SCL CMP1P.6 Number 16 CMP1N.6 17 P1.5 Multifunction I/O Yes P1MAT.5 ADC0.13 I2C0_SDA CMP1P.5 CMP1N.5 18 P1.4 Multifunction I/O Yes P1MAT.4 ADC0.12 CMP1P.4 CMP1N.4 19 P1.3 Multifunction I/O Yes P1MAT.3 ADC0.11 CMP1P.3 CMP1N.3 20 P1.2 Multifunction I/O Yes P1MAT.2 ADC0.10 CMP1P.2 CMP1N.2 21 P1.1 Multifunction I/O Yes P1MAT.1 ADC0.9 CMP1P.1 CMP1N.1 CMP0P.10 CMP0N.10 22 P1.0 Multifunction I/O Yes P1MAT.0 ADC0.8 CMP1P.0 CMP1N.0 CMP0P.9 CMP0N.9 23 24 P0.7 P0.6 Multifunction I/O Multifunction I/O Yes Yes P0MAT.7 ADC0.7 INT0.7 CMP0P.7 INT1.7 CMP0N.7 P0MAT.6 ADC0.6 CNVSTR CMP0P.6 INT0.6 CMP0N.6 INT1.6 25 P0.5 Multifunction I/O Yes P0MAT.5 ADC0.5 INT0.5 CMP0P.5 INT1.5 CMP0N.5 UART0_RX silabs.com | Building a more connected world. Rev. 1.3 | 42 EFM8UB1 Data Sheet Pin Definitions Pin Pin Name Description Crossbar Capability Additional Digital Functions Analog Functions P0.4 Multifunction I/O Yes P0MAT.4 ADC0.4 INT0.4 CMP0P.4 INT1.4 CMP0N.4 Number 26 UART0_TX 27 P0.3 Multifunction I/O Yes P0MAT.3 ADC0.3 EXTCLK CMP0P.3 INT0.3 CMP0N.3 INT1.3 28 Center P0.2 GND Multifunction I/O Yes P0MAT.2 ADC0.2 INT0.2 CMP0P.2 INT1.2 CMP0N.2 Ground silabs.com | Building a more connected world. Rev. 1.3 | 43 EFM8UB1 Data Sheet Pin Definitions 6.2 EFM8UB1x-QSOP24 Pin Definitions P0.2 1 24 P0.3 P0.1 2 23 P0.4 P0.0 3 22 P0.5 GND 4 21 P0.6 D+ 5 20 P0.7 D- 6 19 P1.0 VIO 7 18 P1.1 VDD 8 17 P1.2 VREGIN 9 16 P1.3 P3.1 / VBUS 10 15 P1.4 RSTb / C2CK 11 14 P1.5 P2.0 / C2D 12 13 P1.6 24 pin QSOP (Top View) Figure 6.2. EFM8UB1x-QSOP24 Pinout Table 6.2. Pin Definitions for EFM8UB1x-QSOP24 Pin Pin Name Description Crossbar Capability Additional Digital Functions Analog Functions P0.2 Multifunction I/O Yes P0MAT.2 ADC0.2 INT0.2 CMP0P.2 INT1.2 CMP0N.2 P0MAT.1 ADC0.1 INT0.1 CMP0P.1 INT1.1 CMP0N.1 Number 1 2 P0.1 Multifunction I/O Yes AGND silabs.com | Building a more connected world. Rev. 1.3 | 44 EFM8UB1 Data Sheet Pin Definitions Pin Pin Name Description Crossbar Capability Additional Digital Functions Analog Functions P0.0 Multifunction I/O Yes P0MAT.0 ADC0.0 INT0.0 CMP0P.0 INT1.0 CMP0N.0 Number 3 VREF 4 GND Ground 5 D+ USB Data Positive ADC0.28 6 D- USB Data Negative ADC0.29 7 VIO I/O Power Input 8 VDD Supply Power Input / 5V Regulator Output 9 VREGIN 5V Regulator Input 10 P3.1 Multifunction I/O 11 RSTb / Active-low Reset / C2CK C2 Debug Clock P2.0 / Multifunction I/O / C2D C2 Debug Data P1.6 Multifunction I/O 12 13 VBUS Yes P1MAT.6 ADC0.14 CMP1P.9 CMP1N.9 14 P1.5 Multifunction I/O Yes P1MAT.5 ADC0.13 CMP1P.7 CMP1N.7 15 P1.4 Multifunction I/O Yes P1MAT.4 ADC0.12 CMP1P.6 CMP1N.6 16 P1.3 Multifunction I/O Yes P1MAT.3 ADC0.11 CMP1P.5 CMP1N.5 17 P1.2 Multifunction I/O Yes P1MAT.2 ADC0.10 I2C0_SCL CMP1P.4 CMP1N.4 18 P1.1 Multifunction I/O Yes P1MAT.1 ADC0.9 I2C0_SDA CMP1P.3 CMP1N.3 silabs.com | Building a more connected world. Rev. 1.3 | 45 EFM8UB1 Data Sheet Pin Definitions Pin Pin Name Description Crossbar Capability Additional Digital Functions Analog Functions P1.0 Multifunction I/O Yes P1MAT.0 ADC0.8 Number 19 CMP1P.2 CMP1N.2 20 P0.7 Multifunction I/O Yes P0MAT.7 ADC0.7 INT0.7 CMP1P.1 INT1.7 CMP1N.1 CMP0P.7 CMP0N.7 21 P0.6 Multifunction I/O Yes P0MAT.6 ADC0.6 CNVSTR CMP1P.0 INT0.6 CMP1N.0 INT1.6 CMP0P.6 CMP0N.6 22 P0.5 Multifunction I/O Yes P0MAT.5 ADC0.5 INT0.5 CMP0P.5 INT1.5 CMP0N.5 UART0_RX 23 P0.4 Multifunction I/O Yes P0MAT.4 ADC0.4 INT0.4 CMP0P.4 INT1.4 CMP0N.4 UART0_TX 24 P0.3 Multifunction I/O Yes P0MAT.3 ADC0.3 EXTCLK CMP0P.3 INT0.3 CMP0N.3 INT1.3 silabs.com | Building a more connected world. Rev. 1.3 | 46 EFM8UB1 Data Sheet Pin Definitions D- 5 P0.3 P0.4 P0.5 19 18 17 GND 6 VREGIN VDD (Top View) 10 4 P2.0 / C2D D+ 16 20 pin QFN 9 3 RSTb / C2CK GND 8 2 P3.1 / VBUS P0.0 P0.2 1 7 P0.1 20 6.3 EFM8UB1x-QFN20 Pin Definitions P0.6 15 P0.7 14 P1.0 13 P1.1 12 GND 11 P1.2 Figure 6.3. EFM8UB1x-QFN20 Pinout Table 6.3. Pin Definitions for EFM8UB1x-QFN20 Pin Pin Name Description Crossbar Capability Additional Digital Functions Analog Functions P0.1 Multifunction I/O Yes P0MAT.1 ADC0.1 INT0.1 CMP0P.1 INT1.1 CMP0N.1 Number 1 AGND 2 P0.0 Multifunction I/O Yes P0MAT.0 ADC0.0 INT0.0 CMP0P.0 INT1.0 CMP0N.0 VREF 3 GND Ground silabs.com | Building a more connected world. Rev. 1.3 | 47 EFM8UB1 Data Sheet Pin Definitions Pin Pin Name Description Crossbar Capability 4 D+ USB Data Positive ADC0.28 5 D- USB Data Negative ADC0.29 6 VDD Supply Power Input / Number Additional Digital Functions Analog Functions 5V Regulator Output 7 VREGIN 5V Regulator Input 8 P3.1 Multifunction I/O 9 RST / Active-low Reset / C2CK C2 Debug Clock P2.0 / Multifunction I/O / C2D C2 Debug Data P1.2 Multifunction I/O 10 11 VBUS Yes P1MAT.2 ADC0.10 I2C0_SCL CMP1P.4 CMP1N.4 12 GND Ground 13 P1.1 Multifunction I/O Yes P1MAT.1 ADC0.9 I2C0_SDA CMP1P.3 CMP1N.3 14 P1.0 Multifunction I/O Yes P1MAT.0 ADC0.8 CMP1P.2 CMP1N.2 15 P0.7 Multifunction I/O Yes P0MAT.7 ADC0.7 INT0.7 CMP1P.1 INT1.7 CMP1N.1 CMP0P.7 CMP0N.7 16 P0.6 Multifunction I/O Yes P0MAT.6 ADC0.6 CNVSTR CMP1P.0 INT0.6 CMP1N.0 INT1.6 CMP0P.6 CMP0N.6 17 P0.5 Multifunction I/O Yes P0MAT.5 ADC0.5 INT0.5 CMP0P.5 INT1.5 CMP0N.5 UART0_RX silabs.com | Building a more connected world. Rev. 1.3 | 48 EFM8UB1 Data Sheet Pin Definitions Pin Pin Name Description Crossbar Capability Additional Digital Functions Analog Functions P0.4 Multifunction I/O Yes P0MAT.4 ADC0.4 INT0.4 CMP0P.4 INT1.4 CMP0N.4 Number 18 UART0_TX 19 P0.3 Multifunction I/O Yes P0MAT.3 ADC0.3 EXTCLK CMP0P.3 INT0.3 CMP0N.3 INT1.3 20 Center P0.2 GND Multifunction I/O Yes P0MAT.2 ADC0.2 INT0.2 CMP0P.2 INT1.2 CMP0N.2 Ground silabs.com | Building a more connected world. Rev. 1.3 | 49 EFM8UB1 Data Sheet QFN28 Package Specifications 7. QFN28 Package Specifications 7.1 QFN28 Package Dimensions Figure 7.1. QFN28 Package Drawing Table 7.1. QFN28 Package Dimensions Dimension Min Typ Max A 0.70 0.75 0.80 A1 0.00 — 0.05 A3 b 0.20 REF 0.20 D D2 0.25 0.30 5.00 BSC 3.15 3.25 e 0.50 BSC E 5.00 BSC 3.35 E2 3.15 3.25 3.35 L 0.45 0.55 0.65 aaa 0.10 bbb 0.10 ddd 0.05 silabs.com | Building a more connected world. Rev. 1.3 | 50 EFM8UB1 Data Sheet QFN28 Package Specifications Dimension Min Typ eee 0.08 Z 0.44 Y 0.18 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-220 except for custom features D2, E2, L, Z, and Y which are toleranced per supplier designation. 4. Recommended card reflow profile is per the JEDEC/IPC J-STD-020 specification for Small Body Components. silabs.com | Building a more connected world. Rev. 1.3 | 51 EFM8UB1 Data Sheet QFN28 Package Specifications 7.2 QFN28 PCB Land Pattern X1 C2 Y2 Y1 C0.35 E X2 C1 Figure 7.2. QFN28 PCB Land Pattern Drawing Table 7.2. QFN28 PCB Land Pattern Dimensions Dimension Min Max C1 4.80 C2 4.80 E 0.50 X1 0.30 X2 3.35 Y1 0.95 Y2 3.35 silabs.com | Building a more connected world. Rev. 1.3 | 52 EFM8UB1 Data Sheet QFN28 Package Specifications Dimension Min Max 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 2 x 2 array of 1.2 mm square openings on a 1.5 mm pitch should be used for the center pad. 8. A No-Clean, Type-3 solder paste is recommended. 9. The recommended card reflow profile is per the JEDEC/IPC J-STD-020 specification for Small Body Components. 7.3 QFN28 Package Marking EFM8 PPPPPPPP TTTTTT YYWW # Figure 7.3. QFN28 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.). silabs.com | Building a more connected world. Rev. 1.3 | 53 EFM8UB1 Data Sheet QSOP24 Package Specifications 8. QSOP24 Package Specifications 8.1 Package Dimensions Figure 8.1. Package Drawing Table 8.1. 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 silabs.com | Building a more connected world. 0.40 — 1.27 Rev. 1.3 | 54 EFM8UB1 Data Sheet QSOP24 Package Specifications Dimension theta Min Typ Max 0º — 8º aaa 0.20 bbb 0.18 ccc 0.10 ddd 0.10 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. silabs.com | Building a more connected world. Rev. 1.3 | 55 EFM8UB1 Data Sheet QSOP24 Package Specifications 8.2 PCB Land Pattern Figure 8.2. PCB Land Pattern Drawing Table 8.2. 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. silabs.com | Building a more connected world. Rev. 1.3 | 56 EFM8UB1 Data Sheet QSOP24 Package Specifications 8.3 Package Marking EFM8 PPPPPPPP # TTTTTTYYWW Figure 8.3. 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.). silabs.com | Building a more connected world. Rev. 1.3 | 57 EFM8UB1 Data Sheet QFN20 Package Specifications 9. QFN20 Package Specifications 9.1 QFN20 Package Dimensions Figure 9.1. QFN20 Package Drawing Table 9.1. QFN20 Package Dimensions Dimension Min Typ Max A 0.70 0.75 0.80 A1 0.00 0.02 0.05 A3 0.20 REF b 0.18 0.25 0.30 c 0.25 0.30 0.35 D D2 3.00 BSC 1.6 1.70 e 0.50 BSC E 3.00 BSC silabs.com | Building a more connected world. 1.80 Rev. 1.3 | 58 EFM8UB1 Data Sheet QFN20 Package Specifications Dimension Min Typ Max E2 1.60 1.70 1.80 f L 2.50 BSC 0.30 K R 0.40 0.50 0.25 REF 0.09 0.125 aaa 0.15 bbb 0.10 ccc 0.10 ddd 0.05 eee 0.08 fff 0.10 0.15 Note: 1. All dimensions shown are in millimeters (mm) unless otherwise noted. 2. Dimensioning and Tolerancing per ANSI Y14.5M-1994. 3. The drawing complies with JEDEC MO-220. 4. Recommended card reflow profile is per the JEDEC/IPC J-STD-020 specification for Small Body Components. silabs.com | Building a more connected world. Rev. 1.3 | 59 EFM8UB1 Data Sheet QFN20 Package Specifications 9.2 QFN20 PCB Land Pattern Figure 9.2. QFN20 PCB Land Pattern Drawing Table 9.2. QFN20 PCB Land Pattern Dimensions Dimension Min Max C1 3.10 C2 3.10 C3 2.50 C4 2.50 E 0.50 X1 0.30 X2 0.25 0.35 X3 1.80 Y1 0.90 Y2 Y3 silabs.com | Building a more connected world. 0.25 0.35 1.80 Rev. 1.3 | 60 EFM8UB1 Data Sheet QFN20 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 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 the perimeter pads. 8. A 2 x 2 array of 0.75 mm openings on a 0.95 mm pitch should be used for the center pad to assure proper paste volume. 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 QFN20 Package Marking PPPP PPPP TTTTTT YYWW # Figure 9.3. QFN20 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.). silabs.com | Building a more connected world. Rev. 1.3 | 61 EFM8UB1 Data Sheet Revision History 10. Revision History Revision 1.3 October 20th, 2017 • Updated Figure 3.1 Detailed EFM8UB1 Block Diagram on page 6 to show 1024 bytes of XRAM in the core, since the 1024 bytes of USB FIFO RAM are documented in the USB block. • Updated 3.1 Introduction to mention all device documentation. • Updated text and figures in 5.1 Power to remove mention of the VBUS pin. • Updated Figure 5.2 Connection Diagram with Voltage Regulator Used and USB Connected (Self-Powered) on page 36 to remove VBUS pin. • Updated the title of Figure 5.3 Connection Diagram with Voltage Regulator Not Used (Self-Powered) on page 36 to include "SelfPowered". • Updated 5.2 USB to add a note regarding VBUS. • Updated the maximum Voltage Reference Range specification to reference VDD instead of VIO in 4.1.8 ADC. • Updated the maximum Input Range (CP+ or CP-) specification to reference VDD instead of VIO in 4.1.13 Comparators. • Updated Weak Pull-Up Current specification condition to refer to VIO instead of VDD in 4.1.14 Port I/O. • Added Z and Y dimensions and updated Note 3 in Table 7.1 QFN28 Package Dimensions on page 50. • Updated the QFN20 and QSOP24 C2D pins to not available on the crossbar in 6.3 EFM8UB1x-QFN20 Pin Definitions and 6.2 EFM8UB1x-QSOP24 Pin Definitions. Revision 1.2 March 15th, 2017 • Updated Figure 5.6 Debug Connection Diagram on page 39 to move the pull-up resistor on C2D / RSTb to after the series resistor instead of before. • Added a reference to AN945: EFM8 Factory Bootloader User Guide in 3.10 Bootloader. • • • • Added bootloader pinout information to 3.10 Bootloader. Added a note to 3.1 Introduction referencing the Reference Manual. Specified the sizes of the SMBus and I2CSLAVE transmit and receive FIFOs. Added a note to Table 4.2 Power Consumption on page 17 providing more information about the Comparator Reference specification. Adjusted the Normal Mode and Idle Mode typical and maximum numbers in Table 4.2 Power Consumption on page 17 for FSYSCLK = 48 MHz and FSYSCLK = 24.5 MHz. • • • • • Added a note linking to the Typical VOH and VOL Performance graphs in 4.1.14 Port I/O. Added 4.1.11 1.8 V Internal LDO Voltage Regulator. Added CRC Calculation Time to 4.1.4 Flash Memory. Added specifications for 4.1.16 SMBus. Added Thermal Resistance (Junction to Case) and Thermal Characterization Parameter (Junction to Top) for QFN20 and QFN28 packages to 4.2 Thermal Conditions. • Updated 5.2 USB typical connections chapter to add a note and resistor divider for self-powered configurations. • Corrected the application note number for AN124: Pin Sharing Techniques for the C2 Interface in 5.3 Debug. • Adjusted D, E, and aaa in QFN28 Package Dimensions. Revision 1.1 December 16, 2015 • Updated 3.2 Power to properly reflect that a comparator falling edge wakes the device from Suspend and Snooze. • Added Note 4 to Table 4.1 Recommended Operating Conditions on page 16. • Added 5.3 Debug. silabs.com | Building a more connected world. Rev. 1.3 | 62 EFM8UB1 Data Sheet Revision History Revision 1.0 • Updated any TBD numbers in 4.1 Electrical Characteristics and adjusted various specifications. • Updated VOH and VOL graphs in Figure 4.7 Typical VOH Curves on page 34 and Figure 4.8 Typical VOL Curves on page 34 and updated the VOH and VOL specifications in Table 4.14 Port I/O on page 26. • Added more information to 3.10 Bootloader. • Updated part numbers to Revision C. Revision 0.3 • Updated QFN20 packaging and landing diagram dimensions. • Updated QFN28 D and E minimum value. • Updated some characterization TBD values. • Added maximum allowable voltages on D+ and D- and added VBUS / P3.1 to the standard I/O row in Table 4.19 Absolute Maximum Ratings on page 30. • Added a diagram to 5.1 Power for cases when the internal 5 V-to-3.3 V regulator is not used. • Updated the 5 V-to-3.3 V regulator Electrical Characteristics table. • Added Stop mode to the Power Modes table in 3.2 Power. Revision 0.2 • Initial release. silabs.com | Building a more connected world. Rev. 1.3 | 63 Simplicity Studio One-click access to MCU and wireless tools, documentation, software, source code libraries & more. Available for Windows, Mac and Linux! IoT Portfolio www.silabs.com/IoT SW/HW www.silabs.com/simplicity Quality www.silabs.com/quality Support and Community community.silabs.com Disclaimer Silicon Labs intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers using or intending to use the Silicon Labs products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific device, and "Typical" parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. 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