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PCI2050B: About bus request

ACGUY
Guru 11170 points
Part Number: PCI2050B

Hello E2E,

Regarding the arbitration algorithm of the PCI bus, the arbitration algorithm is described as "two-tier rotational arbitration" in the data sheet. Regardless of the bus request status of each master, can he eventually acquire the bus right if he continues to request the bus?

Specifically, if multiple devices are making repeated bus requests, I would like to see if the requesting device can get the bus right evenly without the particular device continuing to get the bus.

Regards,
ACGUY

  • 0
    TI__Guru* 93670 points

    Greetings,

    PCI Register 0xDC controls arbitration priority. This register defines bus grant priority for different requesters. Given there is a source that keeps hugging the request signal, it has to wait until the other requesters are serviced before it becomes its turn again. 

    Regards,, Nasser