Pci; Pci Signals Definition; Table 14 Pci Signals Definition - Emerson COM Express Carrier Design Manual

11 PCI

11.1 PCI Signals Definition

The below table shows a set of pin defined to be a 32-bit PCI bus on Type 2 and 3 COM Express modules
by the COM Express specification. The PCI bus signals support up to four REQ/GNT pairs and typically
run at 33 MHz. The COM Express PCI bus is specified to be 5 V tolerant, with 3.3 V signaling. All
necessary PCI pull-ups are included on the module.

Table 14 PCI Signals Definition

Signal Pin
PCI_AD0 C24
PCI_AD1 D22
PCI_AD2 C25
PCI_AD3 D23
PCI_AD4 C26
PCI_AD5 D24
PCI_AD6 C27
PCI_AD7 D25
PCI_AD8 C28
PCI_AD9 D27
PCI_AD10 C29
PCI_AD11 D28
PCI_AD12 C30
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Description
PCI bus multiplexed
address and data lines
PCI bus multiplexed
address and data lines
PCI bus multiplexed
address and data lines
PCI bus multiplexed
address and data lines
PCI bus multiplexed
address and data lines
PCI bus multiplexed
address and data lines
PCI bus multiplexed
address and data lines
PCI bus multiplexed
address and data lines
PCI bus multiplexed
address and data lines
PCI bus multiplexed
address and data lines
PCI bus multiplexed
address and data lines
PCI bus multiplexed
address and data lines
PCI bus multiplexed
I/O Comment
I/O 3.3V
I/O 3.3V
I/O 3.3V
I/O 3.3V
I/O 3.3V
I/O 3.3V
I/O 3.3V
I/O 3.3V
I/O 3.3V
I/O 3.3V
I/O 3.3V
I/O 3.3V
I/O 3.3V
COM Express Carrier Type 2
Design Guide