System Arbitration
Élan™SC520 Microcontroller User’s Manual 8-23
4. Enable external PCI requests to the PCI bus arbiter in the System Arbiter Master Enable
(SYSARBMENB) register (MMCR offset 72h). By default, all external PCI bus master
requests are disabled.
5. Enable/Clear the PCI bus GNT
time-out interrupt with the GNT_TO_INT_ENB bit in the
System Arbiter Control (SYSARBCTL) register, if desired. By default, this interrupt
source is disabled, but the GNT_TO_ID status bit is set in the PCI Bus Arbiter Status
(PCIARBSTA) register (MMCR offset 71h) if a PCI bus GNT
time-out is detected.
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