Altera PCA, Руководство пользователя

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9
The pins are numbered as shown with side A on the top of the centerline on the solder side of the
board and side B on the bottom of the centerline on the component side of the board.
The PCIe interface pins PETpx, PETnx, PERpx, and PERnx are named with the following
convention: “PE” stands for PCIe high speed, “T” for Transmitter, “R” for Receiver, “p” for
positive (+), and “n” for negative (-).
Note that adjacent differential pairs are separated by two ground pins to manage the connector
crosstalk.
Table 3-1 gives the wiring information of the PCIe Edge connector.
Table 3-1 Pin assignments and descriptions on PCIe Edge connector
Side B Side A
Pin Numbers
Name Description Name Description
1 NC NC PRSNT1n Hot-Plug
presence detect
2 NC NC NC NC
3 NC NC NC NC
4 GND Ground GND Ground
5 NC NC NC NC
6 NC NC NC NC
7 GND Ground NC NC
8 VCC3P3 3.3V Power NC NC
9 NC NC VCC3P3 3.3V Power
10 3.3VAUX 3.3 V Auxiliary
Power
VCC3P3 3.3V Power
11 WAKE NC PERSTn Fundamental
Reset
Mechanical Key
12 RSVD Reserved GND Ground
13 GND Ground
14 PETp0 REFCLK-
Reference clock
(differential
pair)
15 PETn0
Transmitter
differential pair,
Lane 0 GND Ground
16 GND Ground PERp0
17 PRSNT2n Hot-Plug
presence detect
PERn0
Receiver
differential pair,
Lane 0
18 GND Ground GND Ground
19 PETp1
20 PETn1
Transmitter
differential pair,
Lane 1
GND Ground
21 GND Ground PERp1
22 GND Ground PERn1
Receiver
differential pair,