Altera Arria V Avalon-ST - Manual (Page 92)

Signal Direction Description
txdetectrx0
Output Transmit detect receive . This signal tells the PHY layer to
start a receive detection operation or to begin loopback.
txelecidle0
Output Transmit electrical idle . This signal forces the TX output to
electrical idle.
txcompl0
Output Transmit compliance . This signal forces the running
disparity to negative in Compliance Mode (negative COM
character).
rxpolarity0
Output Receive polarity . This signal instructs the PHY layer to
invert the polarity of the 8B/10B receiver decoding block.
powerdown0[1:0]
Output Power down . This signal requests the PHY to change its
power state to the specified state (P0, P0s, P1, or P2).
tx_deemph0 Output Transmit de-emphasis selection. The Arria V Hard IP for PCI
Express sets the value for this signal based on the indication
received from the other end of the link during the Training
Sequences (TS). You do not need to change this value.
rxdata0[7:0]
(1) Input Receive data (2 symbols on lane ). This bus receives data
on lane .
rxdatak0
(1) Input Receive data >n>. This bus receives data on lane .
rxvalid0
(1) Input Receive valid . This signal indicates symbol lock and valid
data on
rxdata
and
rxdatak
.
phystatus0
(1) Input PHY status . This signal communicates completion of several
PHY requests.
eidleinfersel0[2:0] Output Electrical idle entry inference mechanism selection. The
following encodings are defined:
• 3'b0xx: Electrical Idle Inference not required in current
LTSSM state
• 3'b100: Absence of COM/SKP Ordered Set in the 128 us
window for Gen1 or Gen2
• 3'b101: Absence of TS1/TS2 Ordered Set in a 1280 UI interval
for Gen1 or Gen2
• 3'b110: Absence of Electrical Idle Exit in 2000 UI interval for
Gen1 and 16000 UI interval for Gen2
• 3'b111: Absence of Electrical idle exit in 128 us window for
Gen1
2014.12.15
PIPE Interface Signals 4-55
Interfaces and Signal Descriptions Altera Corporation
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