Page 27 of 28
© Cambridge Silicon Radio Limited 2014
CS-310152-UGP1
www.csr.com
BlueC
or
e
A
D
K
3
.0
Subw
oo
fer
U
s
er
G
uide
5.7.3. Configurable Timers Used by Audio Connect/Disconnect
Sections 5.7.1 and 5.7.2 describe connecting and disconnecting audio streams, this section describes the timers and
when they operate. Figure 5.2 shows these timers:
Figure 5.2: DAC, AMP & MUTE On/Off Control Mechanism
In Figure 5.2, the timers are referenced by:
1.
DAC power on timer
2.
Amplifier power on timer
3.
Mute disable timer
4.
Mute enable timer
5.
Amplifier power off timer
6.
DAC power off timer
These timers are configurable in the Application Features configuration, described in section 4.1.
5.7.4. Supported Audio Output
The device supports two modes of audio output, either by the DAC or the I²S, depending on the amplifier being used,
the correct configuration needs to be set, if the wrong setup is configured, no audio is heard.
5.7.4.1. Analogue Amplifiers
Analogue amplifiers need the audio output type to be set to
AUDIO_OUTPUT_DAC
in the Application Features
configuration, see section 4. This results in the DSP being connected to the DAC output.
5.7.4.2. Digital Amplifiers
Digital amplifiers need the audio output type to be set to
AUDIO_OUTPUT_I²S
in the Application Features
configuration, see section 4.
