GPIO扩展LED闪烁 NXP 2/4/8/16-bit
I2C/SMBus LED blinkers
PCA9550/51/52/53
LED blinking with GPIO expansion
These I2C/SMBus-compatible GPIO expanders, optimized for blinking in LED-status applications,
support two user-programmable blink rates, without overloading the I2C-bus or tying up the I2C-
bus master.
Key features Applications
4 Compatible with I2C-bus and SMBus 4 LED status
4 Two user-programmable blink rates and duty cycles
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