PIC18F1330 controls 3 PWM output channel instances
The DMX512 interface standard (ANSI El.11) is a standard published by the American Theatre Technology Institute (USITT). Originally used to control lighting dimmers, the protocol has now been extended to control luminaire movements, slide projectors and many other lighting fixtures with the advantages of simplicity and low cost. The DNX512 is based on a 250 kilobaud (kbaud) asynchronous serial interface using a standard RS-485 differential line transceiver. The data is transmitted on the basis of 8-bit asynchronous serial communication, 1 start bit, 2 stop bits, and no parity. It has 256 brightness adjustment levels. Most PIC microcontrollers can transmit and receive in several code lines, providing an EUSART peripheral that enables the protocol to be executed in the simplest and most efficient manner. The figure shows an example of the PlC18F1330 controlling three PWM output channels (each channel has a resolution of up to 14 bits).
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