BD37503FV Datasheet, PDF (21/32 Pages) Rohm – Sound processor with Built-in 2-band Equalizer

BD37503FV
Datasheet
2-4. About gain switching of TONE(Bass/ Treble)
When gain is changed from boost to cut (or, from cut to boost), advanced switching is two-step transition movement
that it go through 0dB to prevent the occurrence of the switching noise. And when boost/cut doesn't change between
before switching and after switching, advanced switching is the same as 2-2, 2-3. About advanced switching time, it is
same time length as other switching time length.
■ Transmitting example 8
In case changing Bass gain +15dB from -15dB
I²C B US
(BA SS+15dB)
80 51 0F
A dvanced switc hi ng time
Tsoft= switch in g time ×2
BASS
Switching time
BASS
Switching time
-15 dB → 0dB
0dB → +15dB
OU TF1
【3】Advanced switch transmitting timing list
3-1. Volume/Fader(F1,F2,R1,R2)/TONE(BASS,TREBLE,LOUDNESS)
Advanced switch stand by
Advanced switch active
Transmission timing
Start timing
Advanced switching
time
optional
Starts right after the data
transmission
T_soft^※1
optional
Starts right after present
switching was finished.
T_soft
3-2. TONE BOOST ⇔ CUT
Advanced switch stand by
Advanced switch active
Transmission timing
Start timing
Advanced switching
time
optional
Starts right after the data
transmission
T_soft^※2
optional
Starts right after present
switching was finished.
T_soft
※1 Advanced switching time T_soft equalls to 2times of swithcing time.
※2 About T_soft of TONE BOOST⇔CUT, the time length until gain switching finishes is equal to 2times of swithcing
time, because it go through 0dB when switching from initial gain to requested gain. In this case, Advanced
switching time is same as ※1 above.
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TSZ22111・15・001
21/28
TSZ02201-0V2V0E100000-1-2
2013.07.12 Rev.002