Motorola MVME2400 manual Hawk System Memory Controller SMC/PCI Host Bridge PHB Asic

Block Diagram

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 100MHz.

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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.

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