Intel Phi 7120A SC7120A Data Sheet
Product codes
SC7120A
Document ID Number: 328209 003EN
Intel
®
Xeon Phi™ Coprocessor Datasheet
45
4
Intel
®
Xeon Phi™ Coprocessor
Pin Descriptions
4.1
PCI Express* Signals
The PCI Express* connector for the Intel
®
Xeon Phi™ coprocessor is a x16 interface
and supports signals defined in the “PCI Express
*
Card Electromechanical
Specification”. Signals called out in the PCI Express* specification but not used on the
Intel
Intel
®
Xeon Phi™ coprocessor are listed as “not used” in
.
The symbol _N at the end of a signal name indicates that the active or asserted state
occurs when the signal is at a low voltage level. When _N is not present after the signal
name, the signal is asserted when at the high voltage level.
occurs when the signal is at a low voltage level. When _N is not present after the signal
name, the signal is asserted when at the high voltage level.
The following notations are used to describe the signal type:
I
Signal is an Input to the Intel
®
Xeon Phi™ coprocessor
O
Signal is an Output from the Intel
®
Xeon Phi™ coprocessor
I/O
Bidirectional Input/Output signal
S
Sense pin
P
Power supply signal, sourced from the PCI Express* edge fingers or
supplemental power connectors.
supplemental power connectors.
Table 4-1.
PCI Express* Connector Signals on the Intel® Xeon Phi™ Coprocessor
Signal Name
Signal
Type
Description
EXP_A_TX_[15:0]_DP
EXP_A_TX_[15:0]_DN
EXP_A_TX_[15:0]_DN
O
PCI Express* Differential Transmit Pairs: 16-channel
differential transmit pairs, referenced to the Intel
differential transmit pairs, referenced to the Intel
®
Xeon Phi™ coprocessor. The EXP_A_TX_[15:0]_DP and
EXP_A_TX_[15:0]_DP are connected to the PCI
Express* device transmit pairs on the Intel
EXP_A_TX_[15:0]_DP are connected to the PCI
Express* device transmit pairs on the Intel
®
Xeon Phi™
coprocessor.
EXP_A_RX_[15:0]_DP
EXP_A_RX_[15:0]_DN
EXP_A_RX_[15:0]_DN
I
PCI Express* Differential Receive Pairs: 16-channel
differential receive pairs referenced to the Intel
differential receive pairs referenced to the Intel
®
Xeon
Phi™ coprocessor. The EXP_A_RX_[15:0]_DP and
EXP_A_RX_[15:0]_DP are connected to the PCI
Express* device receive pairs on the Intel
EXP_A_RX_[15:0]_DP are connected to the PCI
Express* device receive pairs on the Intel
®
Xeon Phi™
coprocessor.
CK_PE_100M_16PORT_DP
CK_PE_100M_16PORT_DN
CK_PE_100M_16PORT_DN
I
PCI Express* Reference Clock: 100MHz differential
clock I to Intel® Xeon Phi™ coprocessor for use by the
coprocessor to properly recover data from the PCI
Express* Interface.
clock I to Intel® Xeon Phi™ coprocessor for use by the
coprocessor to properly recover data from the PCI
Express* Interface.
RST_PCIE_N
I
PCI Express* Reset Signal: RST_PCIE_N is a 3.3-volt
active-low signal that when deasserted (high) indicates
that the +12V and VCC3 power supplies are stable and
within their specified tolerance.
active-low signal that when deasserted (high) indicates
that the +12V and VCC3 power supplies are stable and
within their specified tolerance.