Motorola MVME2400 Series - Hawk System Memory Controller (SMC);PCI Host Bridge (PHB) ASIC

3-6 Computer Group Literature Center Web Site
Functional Description
3
Hawk System Memory Controller (SMC)/PCI Host Bridge
(PHB) ASIC
The Hawk ASIC provides the bridge function between the MPC60x bus
and the PCI Local Bus. It provides 32-bit addressing and 64-bit data. The
64-bit addressing (dual address cycle) is not supported. The Hawk
supports various PowerPC processor external bus frequencies up to
100 MHz.
There are four programmable map decoders for each direction to provide
flexible address mappings between the MPC and the PCI Local Bus. Refer
to the MVME2400 Programmer’s Reference Guide for additional
information.
The Hawk ASIC also provides an MPIC Interrupt Controller to handle
various interrupt sources. The interrupt sources are: Four MPIC Timer
Interrupts, the interrupts from all PCI devices, the two software interrupts,
and the ISA interrupts. The ISA interrupts actually are handled as a single
8259 interrupt at INT0.