KSZ9031MNX Datasheet, PDF (34/76 Pages) Micrel Semiconductor – The KSZ9031MNX is a completely integrated triple-speed (10Base-T/100Base-TX/1000Base-T) Ethernet physicallayer transceiver for transmission and reception of data on standard CAT-5 unshielded twisted pair (UTP) cable.

Micrel, Inc.
KSZ9031MNX
For GMII (1000Mbps), the KSZ9031MNX stops the RX_CLK clock output to the MAC after nine or more RX_CLK clock
cycles have occurred in the receive LPI state, to save more power.
Figure 11 shows the LPI transition for GMII receive.
Figure 11. LPI Transition – GMII (1000Mbps) Receive
Similarly, for MII (100Mbps), the KSZ9031MNX stops the RX_CLK clock output to the MAC after nine or more RX_CLK
clock cycles have occurred in the receive LPI state, to save more power.
Figure 12 shows the LPI transition for MII receive.
Figure 12. LPI Transition – MII (100Mbps) Receive
Registers Associated with EEE
The following MMD registers are provided for EEE configuration and management:
• MMD address 3h, register 0h - PCS EEE – Control register
• MMD address 3h, register 1h - PCS EEE – Status register
• MMD address 7h, register 3Ch - EEE Advertisement register
• MMD address 7h, register 3Dh - EEE Link Partner Advertisement register
October 2012
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M9999-103112-1.0