IPC LF not only supports store and forward mode, it also supports modified cut through mode and pure converter mode for low latency data forwarding. IPC LF can transmit packet s up to bytes to meet requirement of extra long packets. The default value is latched at the end of reset. Input pin with internal pull-high resistor. Pin no.
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IPC LF not only supports store and forward mode, it also supports modified cut through mode and pure converter mode for low latency data forwarding. IPC LF can transmit packet s up to bytes to meet requirement of extra long packets. The default value is latched at the end of reset. Input pin with internal pull-high resistor. Pin no. It is an input signal from fiber MAU. Fiber signal detect is active if the voltage on FXSD is higher than the threshold voltage, which is 1.
PIN Description continued Pin no. After reset, it becomes an output pin for testing. It should be connected to GND through a 1k ohm resister to set 0. It is an input pin during reset period. It should be connected to VCC through a 1k ohm resister to set 1. Modified cut-through switch mode: IPC LF will begin to forward a frame after the first 64 bytes data received.
TP port should be forced at M at this mode. Label Type Description Pin no. It can forward a frame despite of its address and CRC error. IPC LF begins to forward the received data only after it receives the frame completely. The latency depends on the packet length.
Modified cut-through mode IPC LF begins to forward the received data when it receives the first 64 bytes of the frame. The latency is about bits time width. The maximum packet length can be up to bytes in this mode. The transmission flow does not wait until entire frame is ready, but instead it forwards the received data immediately after the data being received. Both transceivers are interconnected via internal MII signals, therefore the internal switch engine and data buffer are not used.
The packet length is not limited at this mode. The following table shows all of the combination of its TP port. The remote FX port then forces its TX port to link failed after receiving the non-idle pattern 4. The procedure is illustrated as below. It is always enabled. TP port backpressure control enable for half duplex 1: backpressure enable 0: backpressure disable The default value must be adopted for normal operation.
The default value must be adopted for normal operation. TP receive enable 1: TP port can receive packet 0: TP port drop all received packet The default value must be adopted for normal operation. FX port allocated memory pages The default is pages with 64 bytes per page. TP port auto-negotiation enable 1: TP auto-negotiation enable 0: TP auto-negotiation disable TP port speed selection 1: M, M TP port duplex mode selection 1: full duplex, 0:half duplex TP port flow control selection 1: on, 0:off The default value must be adopted for normal operation.
Functional performance and device reliability are not guaranteed under these conditions. All voltages are specified with respect to GND. Supply Voltage —0. VCC Min. Order Information Part No. IC Plus Corp.
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