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PCA9551 LED闪光器数据手册
消耗积分:3 |
格式:rar |
大小:212 |
2010-03-09
王静
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The PCA9551 LED blinker blinks LEDs in I2C-bus and SMBus applications where it is
necessary to limit bus traffic or free up the I2C-bus 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 normal I/O expanders like the PCF8574 or PCA9554, the
bus master must send repeated commands to turn the LED on and off. This greatly
increases the amount of traffic on the I2C-bus and uses up one of the master's timers.
necessary to limit bus traffic or free up the I2C-bus 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 normal I/O expanders like the PCF8574 or PCA9554, the
bus master must send repeated commands to turn the LED on and off. This greatly
increases the amount of traffic on the I2C-bus and uses up one of the master's timers.
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