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CN8478 Datasheet(PDF) 61 Page - Synaptics Incorporated. |
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CN8478 Datasheet(HTML) 61 Page - Synaptics Incorporated. |
61 / 221 page 100660E Conexant 3-1 3 3.0 Expansion Bus (EBUS) MUSYCC provides a PCI bridge to a local bus interface on MUSYCC called the Expansion Bus (EBUS). The EBUS provides a host processor across the PCI bus to access up to 1 MB of peripheral memory space on the EBUS. Although EBUS utilization is optional, the most notable application for the EBUS is the connection to peripheral devices (e.g., Bt8370 T1/E1 framers) local to MUSYCC’s serial port. Figures 3-1 and 3-2 illustrate block diagrams of the EBUS interface with and without local Multiprocessor Unit (MPU). Figure 3-1. EBUS Functional Block Diagram with Local MPU 8478_007 Clock EBUS Interface Interrupt Clock Address/Data Control Bus Arbitration EINT* Local Expansion Bus Regenerated and Inverted Address/Data MPU Intel Motorola T1/E1 Framer Bt8370 Bus Arbiter Figure 3-2. EBUS Functional Block Diagram without Local MPU Local RAM Control EINT* Clock Address/Data Peripheral Devices Downloadable ROM EBUS Interface 8478_008 |
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