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© Cambridge Silicon Radio Limited 2014
CS-310152-UGP1
www.csr.com
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4.1.
Application Features (PSKEY_USR0)
The ADK 3.0 Subwoofer application has a set of application features that can be used to enable/disable functions
and modify configuration data within the application. These features are configured in PSKEY_USR0.
Table 4.2 describes PSKEY_USR0.
Word(s)
Bit(s)
Description
1
[0:15]
DAC Power On Timer:
Time it takes the DAC to fully power on
Default = 10 ms
2
[0:15]
Amplifier Power On Timer:
Time it takes the amplifier to fully power on.
default = 200 ms)
3
[0:15]
Amplifier UNMUTE Timer:
Time it takes for the amplifier to UNMUTE the audio.
Default = 5 ms
Note:
If MUTE I/O lines are not supported, CSR recommends the using a setting of 10 ms to
allow time for digital mute to be applied.
4
[0:15]
Amplifier MUTE Timer:
Time it takes for the amplifier to MUTE the audio.
Default = 5 ms
Note:
If MUTE I/O lines are not supported, CSR recommends the using a setting of 10 ms to
allow time for digital mute to be applied.
5
[0:15]
Amplifier Power Off Timer:
Time it takes for the amplifier to fully power off
Default = 200 ms
6
[0:15]
DAC Power Off Timer
: Time it takes for the DAC to fully power off
Default = 10 ms
7
[0:7]
External Amplifier Power Control PIO
Default = PIO4
[8:15]
External Amplifier Mute Control PIO
Default = PIO9
8
[0]
Enable/Disable Wired Mode:
0 = Disable (default)
1 = Enabled
[1]
Audio Output Type:
0 = SUBWOOFER_OUTPUT_DAC (default),
1=SUBWOOFER_OUTPUT_I²S
[2]
Flag indicating whether or not the external amplifier supports Mute Control I/O.
0 = not supported (default)
1=supported
[3]
Flag to enable use of the external amplifier Power Control I/O line.
0 = Disabled
1 = Enabled (default))
