2-bit I2C-bus LED driver with programmable blink rates

OverviewThe PCA9550 LED blinker blinks LEDs in I2C-bus and SMBus applications where it is necessary to limit bus traffic or free up the I2C master's (MCU, MPU, DSP, chip set, etc.) timer. The uniqueness of this device is the internal oscillator with two programmable blink rates. To blink LEDs using \n\n?2 LED drivers (on, off, flashing at a programmable rate)\n\n?2 selectable, fully programmable blink rates (frequency and duty cycle) between 0.172 Hz and 44 Hz (5.82 seconds and 0.023 second)\n\n?Input/output not used as LED drivers can be used as regular GPIOs\n\n?Internal oscillator requires ;

恩XP