CN8478 Datasheet, PDF (18/221 Pages) Conexant Systems, Inc – Multichannel Synchronous Communications Controller (MUSYCC)

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