TLK111_14 Datasheet, PDF (40/110 Pages) Texas Instruments – PHYTER® Industrial Temperature 10/100Mbs Ethernet Physical Layer Transceiver

TLK111
SLLSEF8B – AUGUST 2013 – REVISED JANUARY 2014
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6.4 Power Save Modes
The TLK111 supports three types of power-save modes. The lowest power consumption is achieved in
IEEE power down mode. To enter IEEE power down mode, pull the INT/PWDN pin to LOW or program bit
11 in the Basic Mode Control Register (BMCR), address 0x0000. In this mode all internal circuitry except
SMI functionality is shut down (Register access is still available).
To enable and activate all other power save modes through register access, use register PHYSCR
(0x0011h). Setting bit 14 enables all power-save modes; bits [13:12] select between them.
Setting bits [13:12] to “01” powers down the PHY, forcing it into IEEE power down mode (Similar to BMCR
bit 11 functionality).
Setting bits [13:12] to “10” puts the PHY in Low Power Active WOL (Wake-On-LAN) mode.
Setting bits [13:12] to “11” puts the PHY in Low Power Passive WOL (Wake-On-LAN) mode.
When these bits are cleared, the PHY powers up and returns to the last state it was in before it was
powered down.
40
Reset and Power Down Operation
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