
E-110 Core Interface Signals
3-31
E-1110-generated FCS to see if it is valid except when
the host asserts the MTX_NOPRE signal. If the FCS is
not valid, the E-110 core asserts the FCS error signal
(TSV21, which is equivalent to the E-1110 TSV38 signal)
in the Transmit Statistics Vector. E110_CRCEN is
synchronous with the rising edge of the MII_TCLK clock
and may be changed when the transmit engine is idle
(either during reset or when no packet is being
transmitted).
E110_TSVP_L E-110 Transmit Status Vector Pulse
Input
The E110_TSVP_L signal is active-LOW. When asserted,
it indicates that the E110_TSV[30:0] signals have been
updated with a new transmit statistics vector. When
deasserted, it indicates that there has been no update.
E110_TSV[30:0]
E-110 Transmit Status Vector
Input
The E110_TSV[30:0] signals contain the transmit
statistics information. The MAC function updates the
E110_TSV[30:0] signals on the falling edge of the
E110_TSVP_L signal. The MAC issues the statistics
vector at the end of the nal or only attempt to transmit
each packet, whether the packet is transmitted or not.
The E110_TSV[30:0] signals are stable until the
subsequent E110_TSVP_L pulse. The condition
associated with each signal is valid when the signal is
HIGH.
The MAC function provides transmit statistics that can be
used for RMON and SNMP. However, the MAC does not
collect the statistics specically mentioned in the RMON
and SNMP specications. The MAC provides basic per
packet information that can be collected by an application
built on top of the MAC. The collected information can
then be used for RMON and SNMP.