PCA9957 LED driver example code

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PCA9957 LED driver example code

PCA9957 LED driver example code

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The PCA9957 is a daisy-chain SPI-compatible 4-wire serial bus controlled 24-channel constant current LED driver optimized for dimming and blinking 32 mA Red/Green/Blue/Amber (RGBA) LEDs.

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This simple example code was created for FRDM-KL25Z freedom board plus FRDM-A9957HN evaluation board. The code is sets the PCA9957 for the gradation control of all LED channels.

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* Connection:      FRDM-KL25Z          FRDM-A9957HN
* VDD                 J9-4                           J9-2                                                                                                           * VDDIO             J9-8                            J9-4
* GND                 J2-14                         J2-7
* MOSI               J2-8                            J2-4
* MISO               J2-10                          J2-5
* SCLK               J2-12                          J2-6
* CS                   J2-6                            J2-3
* RESET            J9-6                            J9-3
***************************************************************************************************

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最終更新日:
‎01-21-2026 02:55 AM
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