Altera CPRI IP Core User Manual
Page 142

7–26
Chapter 7: Software Interface
Ethernet Registers
CPRI MegaCore Function
December 2013
Altera Corporation
User Guide
tx_discard
[1]
WO
Indicates that the Ethernet transmitter module should discard the
current Ethernet Tx frame.
1'h0
tx_eop
[0]
WO
Indicates that the next data word to be written to the
ETH_TX_DATA
or
ETH_TX_DATA_WAIT
register contains the end-of-packet byte for
this Tx packet.
1’h0
Table 7–58. ETH_TX_CONTROL—Ethernet Tx Control—Offset: 0x21C (Part 2 of 2)
Field
Bits
Access
Function
Default
Table 7–59. ETH_TX_DATA—Ethernet Tx Data—Offset: 0x220
Field
Bits
Access
Function
Default
tx_data
[31:0] RW
Ethernet Tx frame data. If the
tx_ready
bit of the
ETH_TX_READY
register is zero when
tx_data
is loaded, the Ethernet transmitter
module aborts the packet.
32'h0
Table 7–60. ETH_TX_DATA_WAIT—Ethernet Tx Data with Wait-State Insertion—Offset: 0x224
Field
Bits
Access
Function
Default
tx_data
[31:0] RW
Ethernet Tx frame data. If the Ethernet transmitter module writes
Ethernet data to this register, it waits until data is ready, unless the
CPU times out the operation.
1'h0
Table 7–61. ETH_ADDR_MSB—Ethernet MAC Address MSB—Offset: 0x22C
Field
Bits
Access
Function
Default
RSRV
[31:16]
UR0
Reserved.
16'h0
mac[47:32]
[15:0]
RW
Most significant bits (16 bits) of local Ethernet MAC
address.
16'h0
Table 7–62. ETH_ADDR_LSB—Ethernet MAC Address LSB—Offset: 0x230
Field
Bits
Access
Function
Default
mac[31:0]
[31:0]
RW
Least significant bits (32 bits) of local Ethernet MAC
address.
32'h0
Table 7–63. ETH_HASH_TABLE—Ethernet Multicast Filtering Hash Table—Offset: 0x234
Field
Bits
Access
Function
Default
hash
[31:0]
RW
32-bit hash table for multicast filtering. If the group
address bit of the destination MAC address is set, and
multicast address filtering is enabled, this register
filters the packets to be accepted and discarded, as
follows:
If every bit set in this register is also set in the lower 32
bits of the destination MAC address, the packet is
accepted. Otherwise, the packet is discarded.
32'h0