K60P100M100SF2RM Datasheet, PDF (1204/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Functional Description
• A currently ongoing transmit transaction on the transmit application interface is
completed as normal (i.e. until writing end-of-packet (eop)).
• A currently ongoing MII frame receive is completed normally. After that, no further
frames are accepted from the MII.
• A currently ongoing MII frame transmit is completed normally. After that, no further
frames are transmitted.
44.4.9.4 Graceful Stop
During a graceful stop any currently ongoing transactions are completed normally and no
further frames are accepted. The MAC can resume from a graceful stop without the need
for a reset (e.g. clearing ETHER_EN is not required).
The following conditions lead to a graceful stop of the MAC transmit or receive
datapaths.
44.4.9.4.1 Graceful Transmit Stop (GTS)
When gracefully stopped, the MAC is no longer reading frame data from the transmit
FIFO and has completed any ongoing transmission.
In any of the following conditions, the transmit datapath stops after an ongoing frame
transmission has been completed normally.
• ENETn_TCR[GTS] is set by software
• ENETn_TCR[TFC_PAUSE] is set by software requesting a pause frame
transmission. The status (and register bit) is cleared after the pause frame has been
sent.
• A pause frame was received stopping the transmitter. The stopped situation is
terminated when the pause timer expires or a pause frame with zero quanta is
received.
• MAC is placed in sleep mode by software or the processor entering stop mode (see
Sleep Mode).
• The MAC is in hardware freeze mode
When the transmitter has reached its stopped state, the following events occur:
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K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.