CC8520

WWW.TI.COM

SWRS091A – MARCH 2010

9

Copyright

4

NETWORK TOPOLOGY AND NOMENCLATURE

A CC8520 network consists of one Protocol Master (PM) and one or two Protocol Slave(s) (PS). The PM

provides the audio reference clock and controls network association. The PS regenerate the audio reference

clock based on the packets received. Audio can be transmitted from the PM to a PS. The device receiving the

audio is called an Audio Sink, the device sending the audio is called an Audio Source. A device can be both

Audio Sink and Audio Source at the same time (bidirectional audio will be supported in future revisions of the

firmware). The CC8520 network also includes a Data Side-Channel which is a bi-directional data link between

the PM and all PS in the network. This is further described in chapter 8.

Figure 3 illustrates the different network topologies that can be formed with CC8520 using the different

firmware versions.

1 audio channel:

mono audio PM to PS

2 audio channels:

stereo audio PM to PS

2 channels:

mono audio PM to PS1

mono audio PM to PS2

2 channels:

mono audio PS1 to PM

mono audio PS2 to PM

2 channels:

mono audio PM to PS

mono audio PS to PM

2 channels:

mono audio PM to PS1

mono audio PS2 to PM

Figure 3 CC8520 topologies supported for different CC8520 FW revisions

(Yellow arrow = audio channel. Blue arrow = data side channel. PM = Protocol Master. PS = Protocol Slave)

PM

PS

FW1.0

PM

PS1

PS2

FW1.1

PM

PS1

PS2

FW1.1

PM

PS1

PS2

FW2.0

PM

PS

FW2.0

PM

PS

Data channel

Audio channel

FW1.0