Altera UG-01080 Guía de usuario Pagina 278

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12–40 Chapter 12: Stratix V Transceiver Native PHY IP Core
10G PCS Interface
Altera Transceiver PHY IP Core November 2012 Altera Corporation
User Guide
tx_10g_control[9<n>-1:0]
(continued)
Input Yes
Basic mode: 67-bit word width:
[8:3]: Not used
[2]: Inversion Bit - must always be set to 1'b0.
[1]: Sync Header, 1 indicates a control word)
[0]: Sync Header, 1 indicates a data word)
Basic mode: 66-bit word width:
[8:2]: Not used
[1]: Sync Header, 1 indicates a control word)
[0]: Sync Header, 1 indicates 1 data word)
Basic mode: 64-bit, 50-bit, 40-bit, 32-bit word widths:
[8:0]: Not used
tx_10g_data_valid[<n>-1:0]
Input Yes
When asserted, indicates if
tx_data
is valid Use of this
signal depends upon the protocol you are
implementing, as follows:
10G BASE-R: Tie to 1'b1
Interlaken: Acts as control for FIFO write enable. You
should tie this signal to
tx_10g_fifo_pempty
.
Basic with phase compensation FIFO: Tie to 1'b1 as
long as
tx_coreclkin
= data_rate/pld_pcs
interface width
. Otherwise, tie this signal to
tx_10g_fifo_pempty.
Basic with phase compensation FIFO in register
mode. This mode only allows a 1:1 gear box ratio
such as 32:32 and 64:64; consequently, you can tie
tx_10g_data_valid
to 1’b1.
tx_10g_fifo_full[<n>-1:0]
Output Yes
When asserted, indicates that the TX FIFO is full.
Synchronous to
tx_std_clkout
,
tx_10g_fifo_pfull[<n>-1:0]
Output Yes
When asserted, indicates that the TX FIFO is partially
full.
tx_10g_fifo_empty[<n>-1:0]
Output No
TX FIFO empty flag. Synchronous to
tx_std_clkout
.
This signal is pulse-stretched; you must use a
synchronizer.
tx_10g_fifo_pempty
[<n>-1:0]
Output No
TX FIFO partially empty flag. Synchronous to
tx_std_clkout
. This signal is pulse-stretched; you
must use a synchronizer.
tx_10g_fifo_del[<n>-1:0]
Output Yes
When asserted, indicates that a word has been deleted
from the rate match FIFO. This signal is used for the
10GBASE-R protocol.
tx_10g_fifo_insert
[<n>-1:0]
Output No
When asserted, indicates that a word has been inserted
into the rate match FIFO. This signal is used for the
10GBASE-R protocol. This signal is pulse-stretched,
you must use a synchronizer.
Table 12–33. 10G PCS Interface Ports (Part 2 of 8)
Name Dir
Synchronous to
tx_10g_coreclkin/
rx_10g_coreclkin
Description
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