参数资料
型号: IPR-POSPHY4
厂商: Altera
文件页数: 54/144页
文件大小: 0K
描述: IP POS-PHY L4 RENEW
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: 续用许可证
4–14
Chapter 4: Functional Description—Receiver
Error Flagging and Handling
SPI-4.2 Protocol Errors
The receiver MegaCore function decodes the control words from the incoming SPI-4.2
interface and ensures that they follow the state machine shown in Fig. 6.2. Data Path
State Diagram of the SPI-4.2 Specification , and ensures that there are no other errors.
Table 4–3 summarizes the SPI-4.2 protocol errors.
Table 4–3. SPI-4.2 Protocol Error Handling (Part 1 of 3) (Note 1) , (2)
Error
Condition
Response
A transition on the receiver data path that does not follow
Assert err_rd_pr for one clock
Protocol error
Fig. 6.2. Data Path State Diagram of the SPI-4.2
Specification.
cycle.
Start-of-packet spacing
violation (SOP8)
Start of burst error
(SOB)
The SPI-4.2 specification states that SOP control words
should not be less than 8 cycles apart.
Data or training data is received without a payload control
word.
Asserts err_rd_sop8 for one
clock cycle. When this happens,
the data is not affected.
Assert err_rd_sob for one
cycle.
Data is dropped until a proper
payload control word is received.
Training pattern errors ( err_rd_tp ) occur when one of the
following conditions occur:
Assert err_rd_tp at the end of
the training pattern.
Training control portion is too short.
Training control portion is too long.
Channel aligner may not lock.
Some training pattern errors may
Training pattern error
Training data portion is too short.
Training data portion is too long.
Training control word is followed by something other
result in successive assertions of
the err_rd_tp interrupt (for
example, Training Control portion
> 10 cycles).
than another training control word or training data
word.
Malformed data bus during a data or control word.
Missing IDLE before training pattern begins. (The IDLE
can be an EOP).
Assert err_rd_eightn for one
clock cycle.
Packet is marked as errored.
8N boundary error
(8N_ERR)
A burst that is neither a multiple of 16 bytes, nor an EOP.
Consider error as a missing EOP.
Cleanly terminate packet
internally as an EOP-Abort. (3)
POS-PHY Level 4 MegaCore Function User Guide
Process subsequent bursts as
per missing SOP.
May 2013 Altera Corporation
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