19992002,
Mindspeed TechnologiesTM, A Conexant Business
All Rights Reserved.
Information in this document is provided in connection with Mindspeed Technologies ("Mindspeed") products. These materials are provided by
Mindspeed as a service to its customers and may be used for informational purposes only. Mindspeed assumes no responsibility for errors or
omissions in these materials. Mindspeed may make changes to specifications and product descriptions at any time, without notice. Mindspeed
makes no commitment to update the information and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future
changes to its specifications and product descriptions.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in
Mindspeed's Terms and Conditions of Sale for such products, Mindspeed assumes no liability whatsoever.
THESE MATERIALS ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, RELATING TO SALE
AND/OR USE OF MINDSPEED PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR
PURPOSE, CONSEQUENTIAL OR INCIDENTAL DAMAGES, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR
OTHER INTELLECTUAL PROPERTY RIGHT. MINDSPEED FURTHER DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF
THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. MINDSPEED SHALL NOT BE
LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST
REVENUES OR LOST PROFITS, WHICH MAY RESULT FROM THE USE OF THESE MATERIALS.
Mindspeed products are not intended for use in medical, lifesaving or life sustaining applications. Mindspeed customers using or selling
Mindspeed products for use in such applications do so at their own risk and agree to fully indemnify Mindspeed for any damages resulting from
such improper use or sale.
The following are trademarks of Conexant Systems, Inc.: Mindspeed TechnologiesTM, the MindspeedTM logo, and "Build It First"TM. Product
names or services listed in this publication are for identification purposes only, and may be trademarks of third parties. Third-party brands and
names are the property of their respective owners.
For additional disclaimer information, please consult Mindspeed Technologies Legal Information posted at
www.mindspeed.com
which is
incorporated by reference.
500183B
Mindspeed TechnologiesTM
Ordering Information
Model Number
Version
Package
Temperature Range
CN8471AEPF
32-Channel
208-Pin Plastic Quad Flat Pack (PQFP)
40 C to +85 C
CN8472AEPF
64-Channel
208-Pin Plastic Quad Flat Pack (PQFP)
40 C to +85 C
CN8474AEPF
128-Channel
208-Pin Plastic Quad Flat Pack (PQFP)
40 C to +85 C
CN8478EPF
256-Channel
208-Pin Plastic Quad Flat Pack (PQFP)
40 C to +85 C
CN8471AEBG
32-Channel
208-Pin Plastic Ball Grid Array
40 C to +85 C
CN8472AEBG
64-Channel
208-Pin Plastic Ball Grid Array
40 C to +85 C
CN8474AEBG
128-Channel
208-Pin Plastic Ball Grid Array
40 C to +85 C
CN8478EBG
256-Channel
208-Pin Plastic Ball Grid Array
40 C to +85 C
500183B
Mindspeed TechnologiesTM
iii
CN8478/74A/72A/71A
Multichannel Synchronous Communications
Controller (MUSYCCTM)
Product Description
The CN8478, CN8474A, CN8472A, and CN8471A are advanced Multichannel
Synchronous Communication Controllers (MUSYCCs) that format and deformat up to
256 (CN8478), 128 (CN8474A), 64 (CN8472A), or 32 (CN8471A) HDLC channels in a
single CMOS integrated circuit. MUSYCC operates at Layer 2 of the Open Systems
Interconnection (OSI) protocol reference model. MUSYCC provides a comprehensive,
high-density solution for processing HDLC channels for internetworking applications
such as Frame Relay, ISDN D-channel signaling, X.25, Signaling System 7 (SS7), DXI,
ISUP, and LAN/WAN data transport. Under minimal host supervision, MUSYCC
manages a linked list of channel data buffers in host memory by performing Direct
Memory Access (DMA) of the HDLC channels.
MUSYCC interfaces with eight independent serial data streams, such as T1/E1 signals,
and then transfers data across the popular 32-bit Peripheral Component Interface
(PCI) bus to system memory at a rate of up to 66 MHz. Each serial interface can be
operated at up to 8.192 MHz. Logical channels can be mapped as any combination of
DS0 time slots to support ISDN hyperchannels (Nx64 kbps) or as any number of bits
in a DS0 for subchanneling applications (Nx8 kbps). MUSYCC also includes a 32-bit
expansion port for bridging the PCI bus to local microprocessors or peripherals. A
JTAG port enables boundary-scan testing to replace bed-of-nails board testing.
Device drivers for Linux, VxWorks
, and pSOS
TM
operating systems are available
under a no-fee license agreement from Mindspeed. The device drivers include C
source code and supporting software documents.
Functional Block Diagram
PCI Bus
Serial Data Bus
Note: Number of serial interfaces is device-dependent.
Local Bus
Host
Interface
PCI
Interface
Device
Configuration
Registers
PCI
Configuration
Space
(Function 0)
PCI
Configuration
Space
(Function 1)
Channel Group 1 Serial Interface
Channel Group 0 Serial Interface
Channel Group 2 Serial Interface
Channel Group 3 Serial Interface
Channel Group 4 Serial Interface
Channel Group 5 Serial Interface
Channel Group 6 Serial Interface
Channel Group 7 Serial Interface
Boundary Scan and Test Access
Expanion Bus Interface
DMA
Controller
Tx/Rx-DMAC
Interrupt
Controller
Bit-Level
Processor
Tx/Rx-BLP
Port
Interface
Tx/Rx
Distinguishing Features
256-, 128-, 64-, or 32-channel HDLC
controller
OSI Layer 2 protocol support
General purpose HDLC (ISO 3309)
X.25 (LAPB)
Frame relay (LAPF/ANSI T1.618)
ISDN D-channel (LAPD/Q.921)
SS7 support
8, 4, 2, or 1 independent serial interfaces
which support
T1/E1 data streams
DC to 8.192 Mbps TDM busses
Configurable logical channels
Standard DS0 (56, 64 kbps)
Hyperchannel (Nx64)
Subchannel (Nx8)
Per-channel protocol mode selection
16-bit FCS mode
32-bit FCS mode
SS7 mode (16-bit FCS)
Transparent mode (unformatted data)
Per-channel DMA buffer management
Linked list data structures
Variable size transmit/receive FIFO
Per-channel message length check
Select no length checking
Select from two 12-bit registers to
compare message length
Maximum length 16,384 Bytes
Direct PCI bus interface
32-bit, 66 or 33 MHz operation
Bus master and slave operation
PCI Version 2.1
Local Expansion Bus interface (EBUS)
32-bit multiplexed address/data bus
Burst access up to 64 Bytes
Low power, 3.3/2.5 V CMOS operation
JTAG boundary scan access port
208-pin PQFP/surface-mount package
BGA
Applications
ISDN basic-rate or primary-rate interfaces
ISDN D-channel controller
Routers
Cellular base station switch controller
CSU/DSU
Protocol converter
Packet data switch
Frame relay switches/Frame Relay Access
Devices (FRAD)
DXI network interface
Distributed packet-based communications
system
Access multiplexer/concentrator
500183B
Mindspeed TechnologiesTM
v
Contents
Figures
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
Tables
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
CHAPTERS
1.0 System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.1
Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
2.0 Host Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.1
PCI Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.1.1
PCI Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.1.2
PCI Bus Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2.1.3
PCI Configuration Space . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2.2
PCI Configuration Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
2.2.1
Function 0 Network Controller--PCI Master and Slave. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Register 0, Address 00h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Register 1, Address 04h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Register 2, Address 08h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Register 3, Address 0Ch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Register 4, Address 10h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Register 514, Address 14h38h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Register 15, Address 3Ch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
2.2.2
Function 1 Expansion Bus Bridge, PCI Slave. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Register 0, Address 00h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Register 1, Address 04h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Register 2, Address 08h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Register 3, Address 0Ch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Register 4, Address 10h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Register 514, Addresses 14h38h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Register 15, Address 3Ch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
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