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CN8474AEPF

Multichannel Synchronous Communications Controller (MUSYCC™)

Conexant Systems 

1.0 System Description

CN8478/CN8474A/CN8472A/CN8471A

Multichannel Synchronous Communications Controller (MUSYCC™)

Figure 1-3. MUSYCC Application Example—Frame Relay Switch

Frame Relay Network

PHY

PHY

PHY

PHY

Control

Data

MPU

PHY

PHY

PHY

PHY

(Optional)

System Bus – PCM Highway

System Bus – PCM Highway

Tx

Rx

Clk, Data, Clk, Data,

Sync Sync, OOF

Physical Layer

Tx

Clk, Data,

Sync

Rx

Clk, Data,

Sync, OOF

Data Link Layer

Port 0 Port 1

Ch Grp 0 Ch Grp 1

Port 2

Ch Grp 2

Port 3

Port 4

Port 5

Ch Grp 3 Ch Grp 4 Ch Grp 5

Serial Port Interface

CN8478

Host Interface (PCI)

Port 6 Port 7

Ch Grp 6 Ch Grp 7

EBUS

Interface

32-Bit

Address

and Data

Multiplexed

EBUS

PCI Bus

8478_003

PCI Local Bus Bridge

System Host

Channel Group 7 Descriptor

Channel Group 6 Descriptor

Channel Group 5 Descriptor

Channel Group 4 Descriptor

Channel Group 3 Descriptor

Channel Group 2 Descriptor

Channel Group 1 Descriptor

Channel Group 0 Descriptor

Configuration

Tx Channel 31 Message List

Tx Channel ... Message List

Tx Channel 0 Message List

Interrupt

Queue

Rx Channel 31 Message List

Rx Channel ... Message List

Rx Channel 0 Message List

System Memory

1-4

Conexant

100660E

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