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PCA9901

Part Number	PCA9901
Manufacturer	NXP
Description	One Wire Single LED Driver
Published	Jan 16, 2010
Detailed Description	PCA9901 One wire single LED driver Rev. 2 — 2 September 2010 Product data sheet 1. General description The PCA9901 is ...
Datasheet	PCA9901 PDF File

Overview

PCA9901 One wire single LED driver Rev.
2 — 2 September 2010 Product data sheet 1.
General description The PCA9901 is a 20 mA current source for a single LED that allows stand-alone blinking of a predefined pattern to off-load the microcontroller and save battery power.
Programming of the device is done through a training sequence: the host controller sends the LED lighting sequence and the PCA9901 memorizes it.
Once the sequence has been memorized, the PCA9901 can be programmed to send it once or in a loop until the host controller requests the sequence to be stopped.
Commands and blinking sequence are sent through a uni-directional one-wire interface.
Commands include: Training Start, Tr...

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