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Preliminary
3.4 I
2
C Host Mode Controls
In I
2
C Host Mode, the MX5000 will read audio parameters from the external serial flash ROM
after reset. After reset, the system will continuously monitor the value of external analog
control pins for real-time audio controls. These pins are connected to eight potentiometers
on the MX5000 Prototyping Module for OEM presets and user controls, which are
summarized in Table 2.
The MX5000 will support most of its major functions in I
2
C Host mode. Some functions, like
MaxxEQ, require modifying the flash ROM for static customized parameters, or can be used
fully dynamically (and clicklessly) in I
2
C Slave Mode.
Table 2. Analog Control Potentiometers
Potentiometer
Label
Function Full Counterclock-
wise Value
Full Clockwise
Value
I_VOL MaxxVolume ™
Gain
Mute / -80dB + 20dB
BASS MaxxBass ®
Intensity
Bypass
MaxxBass
100% intensity
TREB MaxxTreble ™
Intensity
Bypass
MaxxTreble
100% intensity
STER MaxxStereo ™
Intensity
Bypass
MaxxStereo
100% intensity
DYN_R MaxxVolume ™
Dynamic Range
80dB 20dB
MB_FREQ MaxxBass ®
Frequency
20 Hz 320 Hz
ST_SP MaxxStereo ™
Speaker Span
5 degrees 30s degrees
CROSS Subwoofer Crossover
(active only when
subwoofer out
enabled)
20 Hz 320 Hz
MX5000A Development System January 2007