SM5879AV
Bass Boost
Two types of bass boost and gain modification can be
set by either parallel or microcontroller.
Table 3.
Parallel setting
pin name
BB1
BB2
Mode
Microcontroller
setting flag
FBB1
FBB2
H
H
L
L
H
L
H
L
Flat 1
Bass boost MIN
Bass boost MAX
Flat2
3
Max. Chrasteristic
2
1
Flat1 (0dB)
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
Min. Charasteristic
Flat2 (-8dB)
10
100
1000
104
105
Frequency (Fs)
Figure 5. Bass boost mode frequency response
Bass boost detection output
With microcontroller setting (when P/M is LOW),
the 21st pin is the BBON output pin and functions as
output that detects the bass boost mode.
BBON output is LOW when the bass boost mode is
set to Flat 1 and HIGH in all other cases.
Table 4.
Microcontroller
setting flag
BB1
BB2
Mode
BBON pin
H
H
L
L
H
L
H
L
Flat 1
L
H
H
H
Bass boost MIN
Bass boost MAX
Flat 2
NIPPON PRECISION CIRCUITS—15
NPC [ NIPPON PRECISION CIRCUITS INC ]
