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Wireless Communication with IrDA Standard Protocol Slide 24
Here is a visualization of the CTS and Receive Data Time Window operation. We are assuming that the Host controller Baud rate is 57600, that there is no Byte to Byte spacing, and minimal latency when CTS goes low to Data to start transfer. When CTS goes low, the MCP215x Host UART Receive Buffer is empty. Once 60 Bytes have been received, the CTS signal will be driven high. This is done to indicate to Host Controllers that use a transmit FIFO on the UART.
PTM Published on: 2011-10-28