MAS3507D Micronas Intermetall, MAS3507D Datasheet - Page 28

• Manufacturer Part Number: MAS3507D
• Description: Mpeg 1/2 Layer 2/3 Audio Decoder
• Manufacturer: Micronas Intermetall

MAS 3507D
3.6.2. Muting / Bypass Tone Control
To enable fast and simple mute functionality, set bit 0 in register $aa to ‘1’. Writing a ‘0’ deactivates mute.
It is possible to bypass the complete bass / treble / volume control by setting bit 1 in register $aa (write a ‘2’). Reset-
ting bit 1 to ‘0’ enables tone control again.
3.6.3. Bass and Treble Control
Tone control is implemented in the MAS 3507D. It
allows the control of bass and treble in a range up to
±15 dB, as Table 3–9 shows. To prevent overflow or
clipping effects, the prescaler is built-in. The prescaler
decreases the overall gain of the tone filter, so the full
range up to +15 dB is usable without clipping.
28
Address
$aa
Address
$e7
$6b
$6f
R/W
r/w
R/W
r/w
r/w
r/w
Name
Mute / Bypass
Tone Control
0
1
2
Name
KPrescale
KBass
KTreble
Comment
Forces a mute of the digital output
no mute, Tone control active
mute output, but continue decoding
bypass Bass / Treble / Volume matrix
Comment
responsible for prescale of the tone filter (prevent overflows)
(see Section 2.4.3. on page 8)
responsible for increase / decrease of low frequencies
(see Section 2.4.3. on page 8)
responsible for increase / decrease of high frequencies
(see Section 2.4.3. on page 8)
To select a special setting, max. 3 coefficients have to
be written into registers of the MAS 3507D. This has to
be done via the ‘write register’ I
Section 3.3.3.).
PRELIMINARY DATA SHEET
2
C command (see
Default
$0
Default
$80000
$0
$0
Micronas