CN8478 Datasheet, PDF (15/221 Pages) Conexant Systems, Inc – Multichannel Synchronous Communications Controller (MUSYCC)

1
1.0 System Description
The Conexant MUSYCC is a high-throughput communications controller for synchronous, link-layer
applications that multiplexes and demultiplexes up to 256 data channels. Each channel can be configured to
support HDLC, Transparent, or SS7 applications. MUSYCC operates at the Layer 2 (the data link protocol
level) reference of the International Organization for Standardization (ISO) Open Systems Interconnection
(OSI). MUSYCC is installed between the multiple serial interface devices and the shared buffer memory of one
or more host processors.
MUSYCC’s serial ports interface to a standard Pulse Code Modulation (PCM) highway, which operates at
T1, E1, 2xE1, or 4xE1 rates. Data can be formatted in the HDLC protocol or left unformatted. The protocol is
specified on a per-channel and direction basis.
An on-device Peripheral Components Interface (PCI) controller, known as the host interface, is provided.
Access to MUSYCC is available through PCI read, write, and configuration cycles (see Figure 1-1).
Figure 1-1. System Block Diagram
System
Host
System
Memory
Local
Bus
PCI
Bridge
JTAG
Host
Interface
(PCI)
Optional
Components
Local
Host
Local
Memory
8478_001
Expansion
Bus
Interface
MUSYCC
EBUS
Serial
Interface 0
Serial
Interface 1
Serial
Interface 2
Serial
Interface 3
Serial
Interface 4
Serial
Interface 5
Serial
Interface 6
Serial
Interface 7
Physical
Interface 0
Physical
Interface 1
Physical
Interface 2
Physical
Interface 3
Physical
Interface 4
Physical
Interface 5
Physical
Interface 6
Physical
Interface 7
100660E
Conexant
1-1