Seco CCHPC-C78-C User Manual page 49

Power Ground
PCI Express Transmit Pair 27+
PCI Express Transmit Pair 27-
Power Ground
Power Ground
PCI Express Transmit Pair 28+
PCI Express Transmit Pair 28-
Power Ground
Power Ground
PCI Express Transmit Pair 29+
PCI Express Transmit Pair 29-
Power Ground
Power Ground
PCI Express Transmit Pair 30+
PCI Express Transmit Pair 30-
Power Ground
Power Ground
PCI Express Transmit Pair 31+
PCI Express Transmit Pair 31-
Power Ground
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
Not Connected
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.
GND B61 A61
PCIE_TX27+ B62 A62
PCIE_TX27- B63 A63
GND B64 A64
GND B65 A65
PCIE_TX28+ B66 A66
PCIE_TX28- B67 A67
GND B68 A68
GND B69 A69
PCIE_TX29+ B70 A70
PCIE_TX29- B71 A71
GND B72 A72
GND B73 A73
PCIE_TX30+ B74 A74
PCIE_TX30- B75 A75
GND B76 A76
GND B77 A77
PCIE_TX31+ B78 A78
PCIE_TX31- B79 A79
GND B80 A80
PRSNT2# B81 A81
RSVD B82 A82
PCIE_RX26- PCI Express Receive Pair 26-
GND Power Ground
GND Power Ground
PCIE_RX27+ PCI Express Receive Pair 27+
PCIE_RX27- PCI Express Receive Pair 27-
GND Power Ground
GND Power Ground
PCIE_RX28+ PCI Express Receive Pair 28+
PCIE_RX28- PCI Express Receive Pair 28-
GND Power Ground
GND Power Ground
PCIE_RX29+ PCI Express Receive Pair 29+
PCIE_RX29- PCI Express Receive Pair 29-
GND Power Ground
GND Power Ground
PCIE_RX30+ PCI Express Receive Pair 30+
PCIE_RX30- PCI Express Receive Pair 30-
GND Power Ground
GND Power Ground
PCIE_RX31+ PCI Express Receive Pair 31+
PCIE_RX31- PCI Express Receive Pair 31-
GND Power Ground
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