Altera Triple Speed Ethernet MegaCore Function - Manual (Page 91)

Description R/W Name Bit(s)
CRC forwarding on receive.
• Set this bit to 1 to forward the CRC field to the user
application.
• Set this bit to 0 to remove the CRC field from receive frames
before the MAC function forwards the frame to the user
application.
• The MAC function ignores this bit when it receives a padded
frame and the
PAD_EN
bit is 1. In this case, the MAC
function checks the CRC field and removes the checksum
and padding from the frame before forwarding the frame
to the user application.
RW
CRC_FWD
6
Pause frame forwarding on receive.
• Set this bit to 1 to forward receive pause frames to the user
application.
• Set this bit to 0 to terminate and discard receive pause
frames.
RW
PAUSE_FWD
7
Pause frame processing on receive.
• Set this bit to 1 to ignore receive pause frames.
• Set this bit to 0 to process receive pause frames. The MAC
function suspends transmission for an amount of time
specified by the pause quanta.
RW
PAUSE_IGNORE
8
MAC address on transmit.
• Set this bit to 1 to overwrite the source MAC address in
transmit frames received from the user application with the
MAC primary or supplementary address configured in the
registers. The
TX_ADDR_SEL
bit determines the address
selection.
• Set this bit to 0 to retain the source MAC address in transmit
frames received from the user application.
RW
TX_ADDR_INS
9
Half-duplex enable.
• Set this bit to 1 to enable half-duplex.
• Set this bit to 0 to enable full-duplex.
• The MAC function ignores this bit if you set the
ETH_SPEED
bit to 1.
RW
HD_ENA
10
Excessive collision condition.
• The MAC function sets this bit to 1 when it discards a frame
after detecting a collision on 16 consecutive frame retrans-
missions.
• The MAC function clears this bit following a hardware or
software reset. See the SW_RESET bit description.
RO EXCESS_COL 11
Configuration Register Space Altera Corporation
Send Feedback
UG-01008
Command_Config Register (Dword Offset 0x02) 6-8
2014.06.30