TDA9875A Philips Semiconductors, TDA9875A Datasheet - Page 16

• Manufacturer Part Number: TDA9875A
• Description: Digital TV Sound Processor DTVSP
• Manufacturer: Philips Semiconductors

Philips Semiconductors
6.2.13
The TDA9875A provides a special expert mode that gives
direct write access to the internal Coefficient RAM (CRAM)
of the DSP. It can be used to create user-defined
characteristics, such as a tone control with different corner
frequencies or special boost/cut characteristics to correct
the low-frequency loudspeaker and/or cabinet frequency
responses by means of the bass boost filter. However, this
mode must be used with great care.
6.2.14
Table 5 Overview of DSP functions
1999 Dec 20
Bass control for loudspeaker and
headphone output
Treble control for loudspeaker and
headphone output
Contour for loudspeaker output
Bass boost for loudspeaker output
Volume control for each separate
channel in loudspeaker and
headphone output
Soft mute for loudspeaker and
headphone output
Spatial effects
Pseudo stereo
Beeper additional to the signal in
the loudspeaker and headphone
channel
Automatic Volume Level (AVL)
Digital TV Sound Processor (DTVSP)
E
DSP
XPERT MODE
FUNCTION
FUNCTIONS
EXPERT
MODE
yes
yes
yes
yes
yes
yes
yes
yes
no
no
control range
resolution
resolution at frequency
control range
resolution
resolution at frequency
control range
resolution
resolution at frequency
control range
resolution
resolution at frequency
corner frequency
control range
resolution
mute position at step
processing time
anti-phase crosstalk positions
90 degrees phase shift at frequency
beep frequencies
control range
resolution
mute position at step
step width
AVL output level for an input level
between 0 and 29 dB (full-scale)
attack time
decay time constant
16
PARAMETER
More information on the functions of this device, such as
the number of coefficients per function, their default
values, memory addresses, etc., can be made available
on request.
1
40
1
14
0 to +18
1
40
0 to +20
2
20
350
1
1010 1100
32
30, 40 and 52
150, 200 and 300
see Section 10.3.38
0 to 93
3
0010 0000
quasi continuously
10
2, 4 and 8
12 to +15
12 to +12
83 to +24
23
VALUE
Product specification
TDA9875A
dB
dB
Hz
dB
dB
kHz
dB
dB
Hz
dB
dB
Hz
Hz
dB
dB
ms
%
Hz
dB
dB
dB
ms
s
UNIT