User guide

22 ©Copyright 2006 Cirrus Logic, Inc. DS651PM25
CobraNet Programmer’s Reference
Audio Paths
the maximum size of an Ethernet packet. Therefore Lower-latency modes have relaxed
restrictions in this area. Audio channel count restrictions are summarized below.
Bundle capacity or maximum channel count may be limited in some cases by both the
allowable Ethernet packet size and by the processor bandwidth required to handle lower
latency and/or higher sample rate modes. Limitations imposed by packet size are
illustrated in Table 5 . Limitations imposed by additional bandwidth requirements are
discussed in the Hardware Reference Manual applicable to the particular CobraNet
Interface.
Table 5. Bundle Capacity Limits as a Function of Ethernet Packet Size
Latency
Channels per Bundle
16 bit, 48 kHz 20 bit, 48 kHz 24 bit, 48 kHz 16 bit, 96 kHz 20 bit, 96 kHz 24 bit, 96 kHz
5-1/3 ms 8 8 7 5 4 3
2-2/3ms 888887
1-1/3ms 888888