AM79C973KCW Advanced Micro Devices, AM79C973KCW Datasheet - Page 212

• Manufacturer Part Number: AM79C973KCW
• Description: PCnet-FAST III Single-Chip 10/100 Mbps PCI Ethernet Controller with Integrated PHY
• Manufacturer: Advanced Micro Devices

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RTRY
initiated transmission when oper-
ating in half-duplex mode. The
Am79C973/Am79C975 controller
does not retry upon loss of carri-
er. It will continue to transmit the
whole frame until done. LCAR will
not be set when the device is op-
erating in full-duplex mode. LCAR
is not valid in Internal Loopback
Mode. LCAR is set by the
Am79C973/Am79C975 controller
and cleared by the host.
Retry error indicates that the
transmitter has failed after 16 at-
tempts to successfully transmit a
message, due to repeated colli-
sions on the medium. If DRTY is
set to 1 in the MODE register,
RTRY will set after one failed
transmission attempt. RTRY is
set
Am79C975
cleared by the host.
LCAR will be set when the PHY is
in Link Fail state during transmis-
sion.
by
the
controller
Am79C973/
P R E L I M I N A R Y
Am79C973/Am79C975
and
25-4
3-0
TMD3
Bit
31-0
RES
TRC
US
Name
Reserved locations.
Transmit Retry Count. Indicates
the number of transmit retries of
the associated packet. The maxi-
mum count is 15. However, if a
RETRY error occurs, the count
will roll over to 0.
In this case only, the Transmit
Retry Count value of 0 should be
interpreted as meaning 16. TRC
is written by the Am79C973/
Am79C975 controller into the last
transmit descriptor of a frame, or
when an error terminates a
frame. Valid only when OWN is
cleared to 0.
User Space. Reserved for user
defined space.
Description