CS4525 Datasheet, PDF (73/91 Pages) Cirrus Logic – 30 W Digital TV Amplifier with Integrated ADC

9.8.2
CS4525
Bass Gain Level (Bass[3:0])
Default = 1000
Function:
Sets the gain/attenuation level of the bass shelving filter. The level can be adjusted in 1.5 dB increments
from +12.0 to -10.5 dB.
Bass[3:0] Setting
Bass Shelving Filter Gain/Attenuation
0000 ....................................+12 dB
0001 ....................................+10.5 dB
.....................................
1000 ....................................0 dB
.....................................
1110 .....................................-9.0 dB
1111 .....................................-10.5 dB
9.9 2.1 Bass Manager/Parametric EQ Control (Address 09h)
7
Freeze
6
Reserved
5
BassMgr2
4
BassMgr1
3
BassMgr0
2
EnLFEPEq
1
EnChBPEq
0
EnChAPEq
9.9.1
Freeze Controls (Freeze)
Default = 0
Function:
This function will freeze the previous output of, and allow modifications to be made to the master volume
control (address 57h), channel X volume control (address 58h - 5Ah), and bi-quad coefficients for
channel 1, channel 2 and channel 3 (address 0Ah - 54h) registers without the changes taking effect until
the Freeze bit is disabled. To make multiple changes in these control port registers take effect simulta-
neously, enable the Freeze bit, make all register changes, then disable the Freeze bit.
Freeze Setting
Register Freeze State
0 ..........................................Register freeze disabled.
1 ..........................................Register freeze enabled.
9.9.2
Bass Cross-Over Frequency (BassMgr[2:0])
Default = 000
Function:
Controls the operation and cross-over frequency of the bass manager. See “Bass Management” on
page 35 for more information.
BassMgr[2:0] Setting Bass Manager Crossover Setting
000 ......................................Bass manager disabled.
001 ......................................Selects Bass Manager Frequency 1 - Approximately 80 Hz
010 ......................................Selects Bass Manager Frequency 2 - Approximately 120 Hz
011.......................................Selects Bass Manager Frequency 3 - Approximately 160 Hz
100 ......................................Selects Bass Manager Frequency 4 - Approximately 200 Hz
101 ......................................Selects Bass Manager Frequency 5 - Approximately 240 Hz
110.......................................Selects Bass Manager Frequency 6 - Approximately 280 Hz
111 .......................................Selects Bass Manager Frequency 7 - Approximately 320 Hz
DS726A1
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