EFM8 Universal Bee Family

EFM8UB2 Data Sheet

Feature List

The EFM8UB2 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

• 48 MHz maximum operating frequency

• Memory:

• Up to 64 KB flash memory, in-system re-programmable from firmware.

• Up to 4352 bytes RAM (including 256 bytes standard 8051 RAM and 4096 bytes on-chip XRAM)

• Power:

• Internal LDO regulator for CPU core voltage

• Internal 5-to-3.3 V LDO allows direct connection to USB supply net

• Power-on reset circuit and brownout detectors

• I/O: Up to 40 total multifunction I/O pins:

• Flexible peripheral crossbar for peripheral routing

• 10 mA source, 25 mA sink allows direct drive of LEDs

• Clock Sources:

• Internal 48 MHz precision oscillator ( ±1.5 accuracy without USB clock recovery, ±0.25 accuracy with USB clock recovery)

• Internal 80 kHz low-frequency oscillator

• External crystal, RC, C, and CMOS clock options

• Timers/Counters and PWM:

• 5-channel Programmable Counter Array (PCA) supporting PWM, capture/compare, and frequency output modes with watchdog timer function

• 6 x 16-bit general-purpose timers

• Communications and Digital Peripherals:

• Universal Serial Bus (USB) Function Controller with eight flexible endpoint pipes, integrated transceiver, and 1 KB FIFO RAM

• 2 x UART

• SPI™ Master / Slave

• 2 x SMBus™/I2C™ Master / Slave

• External Memory Interface (EMIF)

• Analog:

• 10-Bit Analog-to-Digital Converter (ADC0)

• 2 x Low-current analog comparators

• 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 2.65 to 3.6 V

• QFP48, QFP32, and QFN32 packages