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PCI arbiter doubt

Hi ,

I have got a basic doubt in PCI arbiter regarding the GRANT signal of the PCI arbiter. When exactly should the PCI arbiter remove the GRANT signal of a particular device , is it totally dependent on the REQ signal of that particular device or does it also depend on FRAME and IRDY.

Thanks in advance .

Regards, Praveen

Reply to
praveen.kantharajapura
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GNT# can be deasserted by the arbiter at any time (no need for REQ# to be deasserted). The current transaction is allowed to continue according to latency timer rules and the new master takes control after the current master idles the bus (deasserts FRAME# and IRDY#).

--
  Keith
Reply to
Keith Williams

As I understand it from my PCI System Architecture (4th edition), the arbiter should remove GRANT when REQ is deasserted. There is no dependence on FRAME or IRDY.

--DF

Reply to
Deefoo

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