参数资料
型号: IP-POSPHY4
厂商: Altera
文件页数: 112/144页
文件大小: 0K
描述: IP POS-PHY L4
标准包装: 1
系列: *
类型: MegaCore
功能: POS-PHY 4 级接口,链路层/物理层
许可证: 初始许可证
A–2
1
Appendix A: Start-Up Sequence
For a 32-bit transmitter MegaCore function, no PLLs are used so the
ctl_tx_pll_areset and stat_rx_pll_locked signals do not exist.
Table A–1. Start-Up Sequence (Part 1 of 2)
Event
1
Description
Power Up
Receiver MegaCore Function
Assert ctl_rx_pll_areset and
rxreset_n .
The receiver MegaCore function sends
framing pattern( 'b11 ) on rstat[1:0] .
Transmitter MegaCore Function
Assert ctl_tx_pll_areset and
txreset_n .
After trefclk stabilizes, deassert the
transmitter PLL reset
Release receiver PLL reset
( ctl_tx_pll_areset ).
2a
Release PLL
areset
( ctl_rx_pll_areset ) after rdclk
stabilizes (timed). Wait for the receiver PLL to
lock ( stat_rx_pll_locked ).
Wait for the transmitter PLL to lock
( stat_tx_pll_locked ). Depending on the
source of trefclk , you can deassert the PLL
reset by observing a PLL locked signal,
waiting for a fixed amount of time, or both.
2b
Wait for other clock
to stabilize.
Wait for all the other clocks ( aN_arxclk ,
rxsys_clk and rav_clk ) to be stable.
Wait for all the clocks ( aN_atxclk ,
txsys_clk and tav_clk ) to be stable.
Wait for at least 4 clock cycles of the
3
Release MegaCore
function reset
Wait for at least 4 clock cycles of the
receiver’s slowest clock, then release the
receiver reset ( rxreset_n ).
transmitter’s slowest clock, then release the
transmitter reset ( txreset_n ).
As soon as reset is released, the MegaCore
function sends a continuous training pattern.
3
4
MegaCore function
Configuration
(Optional)
If MegaCore function configuration needs to
be performed, assert ctl_ry_rsfrm to
disable the status finite state machine (FSM)
from transmitting valid status information.
If Asymmetric Port Support and/or Hitless
B/W Reprovisioning is turned on, set up the
calendar parameters using the Avalon ?
Memory-Mapped (Avalon-MM) interface
Interface for details). Once the MegaCore
function configuration is complete deassert
ctl_ry_rsfrm . All the MegaCore function
parameters (signals that start with ctl_ )
must be stable before releasing
ctl_ry_rsfrm .
The MegaCore function may transmit a valid
status frame if the training is complete.
If MegaCore function configuration needs to
be performed, assert ctl_ts_rsfrm to
prevent the MegaCore function from
attempting to frame, and force it to send a
continuous training pattern.
If Asymmetric Port Support and/or Hitless
B/W Reprovisioning is turned on, set up the
calendar parameters using the Avalon-MM
interface (refer to Appendix E, Programming
Mapped Interface for details). Once the
MegaCore function configuration is complete
deassert ctl_ts_rsfrm . All the MegaCore
function parameters (signal that start with
ctl_ ) must be stable before releasing
ctl_ts_rsfrm .
The status framer searches for a valid status
frame.
DPA circuitry locks onto the training pattern
(1 to approximately 1,000 training repetitions
Trained—DPA
are required). Stratix IV, Stratix III, Stratix II,
5a
variations of
receiver MegaCore
functions
and Stratix GX devices indicate altlvds DPA
has locked by asserting
stat_rd_dpa_lvds_locked . DPA channel
aligner lock is indicated by
stat_rd_dpa_locked .
POS-PHY Level 4 MegaCore Function User Guide
May 2013 Altera Corporation
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