参数资料
型号: IP-POSPHY4
厂商: Altera
文件页数: 84/144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
5–12
Chapter 5: Functional Description—Transmitter
Error Flagging and Handling
A DIP-2 error occurs when the DIP-2 code locally calculated on the received status
message does not match the DIP-2 received in the status message. If a DIP-2 error
occurs, the err_ts_dip2 signal is asserted at the end of the calendar sequence for a
single clock cycle.
A framing status error occurs for three regions:
When something other than framing is received when the framing pattern is
expected.
When an unexpected reserved ( ‘b11 ) is received.
When Hitless B/W reprovisioning is turned on, and a calendar select word is not
‘b01 or ‘b10 .
If a framing status error occurs, the err_ts_frm signal is asserted for one cycle.
The stat_ts_sync signal indicates that the status channel is synchronized. It is
deasserted under the following conditions:
At start up, reset, or user rsfrm
Continuous framing is received
The MAximum Calendar Length or Calendar Multiplier parameters of the status
channel are improperly configured
Continuous DIP-2 errors are received (more than DIP-2 bad threshold)
Two 4-bit inputs, ctl_ts_sync_good_theshold and ctl_ts_sync_bad_theshold
control the stat_ts_sync signal.
The stat_ts_sync signal is asserted when a programmed good_level number of
consecutive, non-errored calendar sequences is received. When stat_ts_sync is
asserted, the MegaCore function sends status normally, based on the received status.
The transmitter ’s credit and scheduling logic can send normal traffic (refer to
Figure 5–6 ).
POS-PHY Level 4 MegaCore Function User Guide
May 2013 Altera Corporation
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