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CN8471A

Multichannel Synchronous Communications Controller (MUSYCC™)

Conexant Systems 

1.0 System Description

CN8478/CN8474A/CN8472A/CN8471A

Multichannel Synchronous Communications Controller (MUSYCC™)

MUSYCC also provides an on-device, 32-bit local expansion bus (EBUS) controller which allows a host

processor to access local memory and physical interface devices directly through MUSYCC over the PCI using

configurable memory mapping features.

MUSYCC manages buffer memory for each active data channel with common list-processing structures.

The on-device features allow data transmission between buffer memory and the serial interfaces with minimum

host processor intervention. This allows the host processor to concentrate on managing the higher layers of the

protocol stack.

Figures 1-2 and 1-3 illustrate detailed system block diagrams and a sample application.

1-2

Conexant

100660E

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