fido2100 3-Port Industrial Ethernet DLR Switch with IEEE1588
Data Sheet
April 10, 2013
8.2 TRANSMIT DATA, Internal MII Interface
An Ethernet packet to be transmitted will be sent to its respective PHY via an MII interface. The
PHY will transmit this data using the MII inputs: px_txc, px_txen, px_txer and px_txd[3:0].
Timing for the TRANSMIT DATA is shown below in Figure 15.
Figure 15 Internal MII Interface, TRANSMIT DATA
Table 14 TRANSMIT DATA, External MII Interface
Description
Symbol
trxdval
trxdhd
min max unit
Transmit Data VALID time
Transmit Data HOLD time
Transmit Data Valid VALID time
Transmit Data Valid HOLD time
Transmit Data Error VALID time
Transmit Data Error HOLD time
5
0
5
0
5
0
ns
ns
ns
ns
ns
ns
trxdvval
trxdvhd
trxerval
trxerhd
45
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