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Wireless Communication with IrDA Standard Protocol Slide 26
For the MCP2140, there is no Receive Data Time Window. CTS is low when the Host UART Receive Buffer has space available. When CTS falls, the entire 29 Bytes of the Host UART Receive Buffer are available. CTS will be driven high when 23 bytes are in the Host UART Receive Buffer. Again this is to “give notice” to Host Controllers that use a transmit FIFO on the UART.
PTM Published on: 2011-10-28