Seco CCHPC-C78-C User Manual page 41

Hot Plug presence detect. Input Signal from add in
card used to enable the reference clock of this slot.
Active low signal, +3.3V_RUN electrical level with a
10k
Power Ground
PCI-e Transmitter lane 1+
PCI-e Transmitter lane 1-
Power Ground
Power Ground
PCI-e Transmitter lane 2+
PCI-e Transmitter lane 2-
Power Ground
Power Ground
PCI-e Transmitter lane 3+. Signal available to this
slot by setting jumper JP6 in 2-3 position.
PCI-e Transmitter lane 3-. Signal available to this
slot by setting jumper JP6 in 2-3 position.
Power Ground
Not Connected
Hot Plug presence detect. Input Signal from add in
card used to enable the reference clock of this slot.
Active low signal, +3.3V_RUN electrical level with a
10k
Power Ground
Please be aware that PCI-e management on the carrier board requires that the add-in card placed on this slot manages the Presence Detect pins
(B81/B48/B31/B17 and A1). More exactly, according to the PCI Express Card Electromechanical Specification v3.0, it is required that these pins are
tied together on the ADD-in Card (at least, it is needed that pin A1 is connected with pin B81 or B48 or B17 or pin B31).
In case that these pins are not tied together on the add-in card, then the carrier board will not acknowledge the presence of the card in the slot, and will
not enable the reference clock (and the add-in card will not work).
CCHPC-C78-C
CCHPC-C78-C - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: S.O. - Reviewed by E.S. Copyright © 2023 SECO S.p.A.
PRSNT2# B17 A17
GND B18 A18
PCIE_TX1+ B19 A19
PCIE_TX1- B20 A20
GND B21 A21
GND B22 A22
PCIE_TX2+ B23 A23
PCIE_TX2- B24 A24
GND B25 A25
GND B26 A26
PCIE_TX3+ B27 A27
PCIE_TX3- B28 A28
GND B29 A29
RSVD B30 A30
PRSNT2# B31 A31
GND B32 A32
PCIE_RX0- PCI-e Receiver lane 0-
GND Power Ground
RSVD Not Connected
GND Power Ground
PCIE_RX1+ PCI-e Receiver lane 1+
PCIE_RX1- PCI-e Receiver lane 1-
GND Power Ground
GND Power Ground
PCIE_RX2+ PCI-e Receiver lane 2+
PCIE_RX2- PCI-e Receiver lane 2-
GND Power Ground
GND Power Ground
PCI-e Receiver lane 3+. Signal available to this slot
PCIE_RX3+
by setting jumper JP6 in 2-3 position.
PCI-e Receiver lane 3-. Signal available to this slot
PCIE_RX3-
by setting jumper JP6 in 2-3 position.
GND Power Ground
RSVD Not Connected
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