Terasic PCA, Руководство пользователя

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8
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
Pin Numbers
Side B Side A
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 Reference clock
(differential
pair)
14 PETp0 Transmitter
differential pair,
Lane 0
REFCLK-
15 PETn0 GND Ground
16 GND Ground PERp0 Receiver
differential pair,
Lane 0
17 PRSNT2n Hot-Plug
presence detect
PERn0
18 GND Ground GND Ground
19 PETp1 Transmitter
differential pair,
Lane 1
20 PETn1 GND Ground
21 GND Ground PERp1 Receiver
differential pair,
Lane 1
22 GND Ground PERn1
23 PETp2 Transmitter
differential pair,
GND Ground
24 PETn2 GND Ground