CCOMe-C79
CCOMe-C79 - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by E.S. Copyright © 2021 SECO S.p.A.
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
PRSNT2#
B48
A48
PCIE_RX15-
PCI-e Receiver lane 15-
Power Ground
GND
B49
A49
GND
Power Ground
Please be aware that PCI-e management on CCOMe-C79 carrier board requires that the add-in card placed on this slot manages the Presence Detect
pins (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 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).
