Altera POS-PHY Level 4 IP Core - Manual (Page 64)

4–26 Chapter 4: Functional Description—Receiver
Signals
POS-PHY Level 4 IP Core User Guide December 2014 Altera Corporation
ctl_ry_rsfrm Input
rxsys_clk
When asserted, the ctl_ry_rsfrm signal forces the
receiver status channel into framing mode beginning at
the end of the next frame. You can use ctl_ry_rsfrm
to indicate that the receiver requires retraining.
ctl_ry_dip2err_ins Input
If you assert ctl_ry_dip2err_ins while it is
calculating the DIP2, it inverts it. It does not invert the
statuses on the way and does not wait for the end of the
calendar to do the inversion. Also, if the error is set for
the calendar length (plus 2 cycles, 1 for DIP2 one for
FRM), it is only active on one DIP2 calculation.
Therefore you should not see two consecutive DIP2
errors.
stat_ry_disabled Output
Indicates that the calendar state machine is disabled,
and is transmitting continuous framing.
stat_ry_dip2state Output
Indicates that the calendar state machine is in DIP-2
state.
err_ry_stat_fifo Output
Indicates that the status FIFO buffer has underflowed or
overflowed causing the status finite state machine to go
into continuous framing state (refer to
“Single Clock
Mode” on page 4–9 ). If the status FIFO buffer regularly
underflows or overflows, ensure the clock relationships
meet Altera guidelines.
ctl_ry_callen[7:0] Input
Sets the length of the calendar in the outgoing status
frame. Zero is interpreted as 256. This port is absent if
asymmetric port support is turned on. Only change at
reset, or when ctl_ry_rsfrm and
stat_ry_disabled
are both asserted.
ctl_ry_calm[7:0] Input
Sets the number of status calendar repetitions between
framing and DIP-2 in the outgoing status frame. If
err_ry_stat_fifo
is asserted, you need to increase
the number of repetitions. Refer to “Single Clock Mode”
on page 4–9 . Zero is interpreted as 256. This port is
absent if asymmetric port support is turned on. Only
change at reset, or when ctl_ry_rsfrm and
stat_ry_disabled
are both asserted.
stat_ry_calsel Output
Indicates the currently selected calendar when hitless
bandwidth reprovisioning is enabled. It is set to zero
otherwise. This port is absent if asymmetric port
support is turned off.
Table 4–9. SPI-4.2 Channel Control and Status (Part 2 of 3)
Signal Direction Clock Domain Description