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Product Descriptions

The MPC 82389 is a highly integrated VLSl device that maximizes the performance of a Multibus ll based multiprocessor system. lt integrates the functions of bus arbitration, data transmit packetizing, error handling and interrupt control. Because of these integrated functions, the host CPU can be offloaded to utilize the maximum bus performance and subsequently increase the system throughput. The MPc 82389 also supports geographic addressing by providing access to the local interconnect registers for reference and control.

The MPC 82389 is designed to interface with an 8-, 16-, or 32-bit processor. The Parallel System Bus (PSB)performance is not affected by the CPU bus width or bandwidth. The data on the PS8 is burst transferred at the maximum bus speed of 40 Megabytes/second regardless of CPU bus performance. Such performance is possible due to decoupling of the CPU from the PSB.

This data sheet is supplemented by a MPc User's Manual, Intel literature number 176526-002. The MPC User's Manual/ provides detailed information regarding hardware and software board design information. in addition, the lEEE 1296 specification can provide more information regarding the MULTlBUS ll bus architecture.

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