Altera Triple Speed Ethernet MegaCore Function User Manual
Page 147
Description
Width
I/O
Signal
The location of the checksum field, relative
to the first byte of the packet.
Assert this signal in the same clock cycle as
the start of packet (
avalon_st_tx_
startofpacket
is asserted).
16
I
tx_etstamp_ins_ctrl_offset_
checksum_field[]
The location of the checksum correction
field, relative to the first byte of the packet.
Assert this signal in the same clock cycle as
the start of packet (
avalon_st_tx_
startofpacket
is asserted).
16
I
tx_etstamp_ins_ctrl_offset_
checksum_correction[]
IEEE 1588v2 Time-of-Day (ToD) Clock Interface Signals
Table 7-33: IEEE 1588v2 ToD Clock Interface Signals
Description
Width
I/O
Signal
Use this bus to carry the time-of-day from
external ToD module to 96-bit MAC TX
clock.
Consists of 48 bits seconds field, 32 bits
nanoseconds field, and 16 bits fractional
nanoseconds field
96
I
tx_time_of_day_96b_data_n
Use this bus to carry the time-of-day from
external ToD module to 96-bit MAC RX
clock.
Consists of 48 bits seconds field, 32 bits
nanoseconds field, and 16 bits fractional
nanoseconds field
96
I
rx_time_of_day_96b_data
Use this bus to carry the time-of-day from
external ToD module to 64-bit MAC TX
clock.
Consists of 48-bit nanoseconds field and
16-bit fractional nanoseconds field
64
I
tx_time_of_day_64b_data
Use this bus to carry the time-of-day from
external ToD module to 64-bit MAC RX
clock.
Consists of 48-bit nanoseconds field and
16-bit fractional nanoseconds field
64
I
rx_time_of_day_64b_data
Interface Signals
Altera Corporation
UG-01008
IEEE 1588v2 Time-of-Day (ToD) Clock Interface Signals
7-32
2014.06.30