CC8520 Datasheet, PDF (9/17 Pages) Texas Instruments – 2.4 GHz RF SoC FOR WIRELESS DIGITAL AUDIO STREAMING CC8520 - PurePath™ Wireless

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CC8520
SWRS091A – MARCH 2010
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.
Audio channel
FW1.0
FW1.0
PM
PS
PM
PS
Data channel
1 audio channel:
mono audio PM to PS
2 audio channels:
stereo audio PM to PS
FW1.1
PS1
PM
PS2
2 channels:
mono audio PM to PS1
mono audio PM to PS2
FW1.1
PS1
PM
PS2
2 channels:
mono audio PS1 to PM
mono audio PS2 to PM
FW2.0
PM
PS
2 channels:
mono audio PM to PS
mono audio PS to PM
PS1
PM
PS2
2 channels:
mono audio PM to PS1
mono audio PS2 to PM
FW2.0
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)
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