CME-Atom User Manual 1.2
www.diamondsystems.com
Page 19
4.1.4
PCI Express
These pins provide connections to the PCI Express interface and card.
Signal Name
Signal Function
Direction
PCIE_TX[0:3]+
PCIE_TX[0:3]-
PCI Express Differential Transmit Pairs 0 through 3
O
PCIE_RX[0:3]+
PCIE_RX[0:3]-
PCI Express Differential Receive Pairs 0 through 3
I
PCIE_/- PCI Express Clock Reference.
I
EXCD_CPPE[0:1]
PCI Express Card.
I
EXCD_RST[0:1]#
PCI Express Card reset.
I
4.1.5
SATA
These pins carry the Serial ATA signals.
Signal Name
Signal Function
Direction
S
SATA0_TX
Serial ATA or SAS Channel 0 transmit differential pair.
O
S
SATA0_RX
Serial ATA or SAS Channel 0 receive differential pair.
I
S
SATA2_TX
Serial ATA or SAS Channel 2 transmit differential pair.
O
S
SATA2_RX
Serial ATA or SAS Channel 2 receive differential pair.
I
ATA_ACT#
ATA (parallel and serial) or SAS activity indicator.
O
4.1.6
General Purpose Inputs and Outputs (GPIO)
These pins carry four general purpose input lines and four general purpose outputs.
Signal Name
Signal Function
Direction
GPO[0:3]
General purpose output pins.
O
GPI[0:3]
General purpose input pins.
I