Signal Description
56 Datasheet
2.3 PCI Interface
Note: PCI Interface is not available, except for specific signal exceptions called out below.
PERp6, PERn6 I PCI Express Differential Receive Pair 6
PETp7, PETn7 O PCI Express Differential Transmit Pair 7
PERp7, PERn7 I PCI Express Differential Receive Pair 7
PETp8, PETn8 O PCI Express Differential Transmit Pair 8
PERp8, PERn8 I PCI Express Differential Receive Pair 8
Table 2-3. PCI Interface Signals (Sheet 1 of 2)
Name Type Description
AD[31:0] (not
available in
mobile)
I/O PCI Address/Data: Reserved.
C/BE[3:0]# (not
available in
mobile)
I/O Bus Command and Byte Enables: Reserved.
DEVSEL# (not
available in
mobile)
I/O Device Select: Reserved.
FRAME# (not
available in
mobile)
I/O Cycle Frame: Reserved.
IRDY# (not
available in
mobile)
I/O Initiator Ready: Reserved.
TRDY# (not
available in
mobile)
I/O Target Ready: Reserved.
STOP# (not
available in
mobile)
I/O Stop: Reserved.
PAR (not
available in
mobile)
I/O Calculated/Checked Parity: Reserved.
PERR# (not
available in
mobile)
I/O Parity Error: Reserved.
REQ0# (not
available in
mobile)
REQ1#/ GPIO50
REQ2#/ GPIO52
REQ3#/GPIO54
I
PCI Requests: REQ functionality is Reserved.
REQ[3:1]# pins can instead be used as GPIO.
NOTES:
1. REQ[3:0]# functionality not available.
2. An external pull-up resistor to Vcc3_3 is required when a pin
is not used as a GPIO (that is, a pull-up is required when not
used).
Table 2-2. PCI Express* Signals (Sheet 2 of 2)
Name Type Description
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