What is the purpose of the transmit threshold count in csr6 and store forward functionality?
The purpose of the Transmit Threshold control is to determine the number of bytes of a packet to be transmitted that must be in the TX FIFO before the device will start transmitting the packet. The main purpose is to avoid transmit FIFO underflows and to allow more efficient utilization of memory transfers from the transmit buffer to the TX FIFO in the chip. However, when the end of the packet to be transmitted is written into the TX FIFO, the packet will be transmitted regardless of whether or not the transmit threshold has been reached. The Store and Forward (SF bit in CSR6) is used to ignore the transmit threshold setting to not transmit the packet until the entire packet is in the TX FIFO.
