PX1011BI-EL1/G,518 NXP Semiconductors, PX1011BI-EL1/G,518 Datasheet - Page 17

• Manufacturer Part Number: PX1011BI-EL1/G,518
• Description: IC PCI-EXPRESS X1 PHY 81LFBGA
• Manufacturer: NXP Semiconductors

Specifications of PX1011BI-EL1/G,518

• Package / Case: 81-LFBGA
• Mounting Type: Surface Mount
• Voltage - Supply: 1.2 V
• Applications: PCI Express MAX to PCI Express PHY
• Interface: JTAG
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

NXP Semiconductors
PX1011B
Product data sheet
8.11 Polarity inversion
For an elastic buffer overflow, the overflow is signaled during the clock cycle where the
dropped symbol would have appeared in the data stream. In the timing diagram of
Figure
buffer overflows causing the symbol Rx-d to be discarded. The PHY drives RXSTATUS to
indicate buffer overflow during the clock cycle when Rx-d would have appeared on the
parallel interface.
To support lane polarity inversion, the PHY inverts received data when RXPOL is
asserted. The PHY begins data inversion within 20 symbols after RXPOL is asserted.
Fig 13. Elastic buffer underflow
Fig 14. Elastic buffer overflow
Fig 15. Polarity inversion
RXSTATUS2,
RXSTATUS1,
RXSTATUS0
RXDATA[7:0]
RXDATA[7:0]
RXDATA[7:0]
RXSTATUS2,
RXSTATUS1,
RXSTATUS0
14, the PHY is receiving a repeating set of symbols Rx-a through Rx-z. The elastic
RXVALID
RXVALID
RXVALID
RXCLK
RXPOL
RXCLK
RXCLK
All information provided in this document is subject to legal disclaimers.
Rx-a
000b
D21.5
Rx-a
000b
Rev. 5 — 18 April 2011
Rx-b
D21.5
Rx-b
Rx-c
Rx-c
PCI Express stand-alone X1 PHY
101b
110b
Rx-e
D10.2
EDB
Rx-f
000b
D10.2
Rx-d
000b
PX1011B
© NXP B.V. 2011. All rights reserved.
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