参数资料
型号: IPR-POSPHY4
厂商: Altera
文件页数: 65/144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
Chapter 4: Functional Description—Receiver
Signals
Table 4–7. Atlantic Receive Interface (Slave Source) (Note 1)
4–25
Signal
Direction
Clock Domain
Description
Atlantic clock (one for each Atlantic interface). This input is absent
aN_arxclk
aN_arxdav
aN_arxena
aN_arxdat[n:0]
Input
Output
Input
Output
and internally connected to rxsys_clk if a single clock domain is
selected. Signals prefixed with aN_ are synchronous to this clock.
Atlantic data available (one for each Atlantic interface). Asserted when
the Atlantic FIFO buffer has at least ctl_ax_ftl bytes available to
read.
Atlantic enable (one for each Atlantic interface).
Atlantic data bus (one for each Atlantic interface). The width is set by
the Atlantic interface width parameter.
aN_arxval
aN_arxsop
aN_arxeop
Output
Output
Output
aN_arxclk
Atlantic data valid (one for each Atlantic interface).
Atlantic start of packet (one for each Atlantic interface).
Atlantic end of packet (one for each Atlantic interface).
Atlantic empty signal (one for each Atlantic interface). Number of
aN_arxmty[n:0]
aN_arxerr
aN_arxadr[7:0]
Output
Output
Output
invalid octets on the upper bits of the Atlantic data bus ( aN_arxdat ).
Valid only when aN_arxeop is asserted. The width is l og2(Atlantic
width/8) .
Atlantic error (one for each Atlantic interface).
Atlantic port address (one for each Atlantic interface). Only present
for the shared buffer with embedded addressing mode.
Note to Table 4–7 :
(1) N is equal to the number of ports for the individual buffers mode; N is equal to zero for the shared buffer with embedded addressing mode.
Table 4–8. Atlantic FIFO Buffer Control and Status (Part 1 of 2)
Signal
ctl_ax_ftl[n:0] (1)
Direction Clock Domain
Input
Input –
Description
FIFO buffer threshold low determines when to inform the
user logic that data is available via the aN_arxdav signal.
This threshold applies to all buffers. Units are in bytes.
Only change at reset.
Assert to turn on dav when there is an end of packet
ctl_ax_fifo_eopdav
err_aN_fifo_parityN
Static
reset
Output
aN_arxclk
below the FTL threshold. Value applies to all Atlantic
buffers. Only change at reset.
Indicates that the FIFO buffer has detected a parity error
(one for each Atlantic buffer).
Indicates that the FIFO buffer has underflowed. Asserted
stat_aN_fifo_emptyN
Output
for one cycle if a buffer read fails because the buffer is
empty (one for each Atlantic interface).
May 2013
Altera Corporation
POS-PHY Level 4 MegaCore Function User Guide
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