P2041 is having 3 PCI express controller
I am using PEX2 (PCI Express Controller 2)
Is there any limit of number of PCI devices that can be connected to PCI Express controller
or we can connect any number of devices using switches and bridges
Thanks and regards
According to the PCI Express Specification a device's location for a PCIe controller is specified by an 8-bit bus number, a 5-bit device number and a 3-bit function number.
As per P2041 reference manual (Table 24.1 and Table 24.3)
PEX2(PCI express controller )
INTA has got Interrupt number 25
INTB has IRQ5,
INTC has IRQ6
INTD has IRQ7
So does that mean it can support only 4 pci devices ?
PCIe devices use MSI interrupts.