摘要
PCA9633是一款通过12C总线控制的4路LED控制芯片，每一路LED输出的状态可以设置为没有PWM（PulseWidthModulation）控制的关或开，或者由其独立的PWM控制器的值和组PWM控制器的值确定。LED驱动输出的信号频率为97kHz，占空比在0％～99．6％可调。本文介绍PCA9633的12C协议，重点介绍它与CPU的硬件电路图以及通过C语言编程实现12C时序，驱动LED灯发光，最后给出应用实例。
The PCA9633 is an I2C-bus controlled 4-bit LED driver, each LED output can be off or on （no PWM control）, set at its individual PWM controller value or at both individual and Group PWM controller values.And individual PWM controller that operates at 97 kHz with a duty cycle that is adjustable from 0% to 99.6% to allow the LED to be set to a specific brightness. This paper introduces the I2C agreement of PCA9633, mainly focuses on It＇s hardware circuits, CPU hardware circuits and C Programming. The application example of driver LED brightness is also presented.
出处
《微型机与应用》
2015年第7期30-33,共4页
Microcomputer & Its Applications
基金
南京工程学院教改基金(JG201425)
