Intel 820E manual Communication and Networking Riser CNR, Valid Codec Configurations

Intel® 820E Chipset

R

Valid Codec Configurations

Table 19. Codec Configurations

Valid Codec Configurations

AC(Primary)

MC(Primary)

AMC(Primary)

AC(Primary) + MC(Secondary)

AC(Primary) + AC(Secondary)

AC(Primary) + AMC(Secondary)

Invalid Codec Configurations

MC(Primary) + X(any other type of codec)

AMC(Primary) + AMC(Secondary)

AMC(Primary) + MC(Secondary)

2.13.2.Communication and Networking Riser (CNR)

Related Documents:

Communication Network Riser Specification, Revision 1.1, available at:

http://developer.intel.com/technology/cnr

The Communication and Networking Riser (CNR) Specification defines a hardware scalable Original Equipment Manufacturer (OEM) motherboard riser and interface. This interface supports multi-channel audio, V.90 analog modem, phone-line based networking, and 10/100 Ethernet based networking. The CNR specification defines the interface, which should be configured prior to shipment of the system. Standard I/O expansion slots, such as those supported by the PCI bus architecture, are intended to continue serving as the upgrade medium. The CNR mechanically shares a PCI slot. Unlike the AMR, the system designer will not sacrifice a PCI slot if they decide not to include a CNR in a particular build. It is required that the CNR A0-A2 pins be set to a unique address, so that the CNR EEPROM can be accessed. See CNR specification.

Figure 55 indicates the interface for the CNR connector. Refer to the appropriate section of this document for the corresponding design and layout guidelines. The Platform LAN Connection (PLC) can either be an Intel 82562EH or Intel 82562EM component. Refer to the CNR specification for additional information.

Figure 55. CNR Interface

	AC '97 Interface
Core Logic	LAN Interface	Communication and
	USB
Controller		Networking Riser
	SMBus	(up to 2 AC'97 codecs &
	Power
		one PLC Device)
	Reserved
		CNR Connector

90 Design Guide