Hardware; Figure 2. Cobranet Interface Hardware Block Diagram - Cirrus Logic CobraNet Silicon Series Hardware User Manual

CobraNet Hardware User's Manual

Hardware

3.0 Hardware
Figure 2
Clock
Audio
Serial
Host
Flash memory holds the CobraNet firmware and management interface variable settings.
The CS181xx is the heart of the CobraNet interface. It implements the network protocol
stacks and performs the synchronous-to-isochronous and isochronous-to-synchronous
conversions. The CS181xx has a role in sample clock regeneration and performs all
interactions with the host system.
The sample clock is generated by a voltage-controlled crystal oscillator (VCXO)
controlled by the CS181xx. The VCXO frequency is carefully adjusted to achieve lock with
the network clock.
The Ethernet controller is a standard interface chip that implements the 100-Mbit Fast
Ethernet standard. As per Ethernet requirements the interface is transformer isolated.
8
shows a high-level view of the CobraNet CM-2 interface hardware architecture.
Clock
VCXO
Control
CS18101

Figure 2. CobraNet Interface Hardware Block Diagram

©
Copyright 2004 Cirrus Logic, Inc.
Flash
Memory
Ethernet
Controller
CobraNet CM-2
Module
Ethernet
Magnetics
DS651UM21
Version 2.1