August 2008
Beginner to intermediate
304 pages
6h 2m
English
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1.4. PIC16 Serial Interfaces
• USART asynchronous link
• SPI synchronous bus
• I2C synchronous bus
Serial data connections are useful because only one or two signal wires are needed, compared with at least eight data lines for a parallel bus plus control signals. The typical PIC microcontroller offers a choice of serial interfaces. The best one for any given communication channel depends on the distance between nodes, the speed, and the number of hardware connections required.
USART
The universal synchronous/asynchronous receive transmit (USART) device is typically used in asynchronous mode to implement off-board, one-to-one connections. The term asynchronous means no separate clock signal is needed to time the data reception, so only a data send, ...
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