QS7785 NPC [Nippon Precision Circuits Inc], QS7785 Datasheet - Page 9

• Manufacturer Part Number: QS7785
• Description: 3D 2/4-Channel Stereo Surround Synthesizer
• Manufacturer: NPC [Nippon Precision Circuits Inc]

In output modes 9 to 11, the input stereo signal is
output to the speakers without processing. The
bypass function works for both stereo and mono
input signals, and is used to listen to the original sig-
nals. In mode 9, the stereo signal is output on front
speakers only. In mode 10, the stereo signal is output
Center signal output
1. – (dash) = no output signal.
The center signal is output on COUT. See “Center Control.”
Bass boost mode
1. × = indicates don’t care.
The bass boost function is used to enhance the bass frequency component. See “Bass Boost.”
Mute and power save
1. – (dash) = no output signal.
When PSAVE is HIGH, the analog stages of the
device are turned OFF to save power. When MUTE
is HIGH, all outputs are muted.
BYP
× = indicates don’t care.
1 = HIGH, 0 = LOW
1 = HIGH, 0 = LOW
× = indicates don’t care.
1 = HIGH, 0 = LOW
BYP
×
×
×
×
×
BYP
×
×
MONO
MONO
×
×
×
×
×
Control pins/SDA signal
SUR
×
×
×
SUR
Control pins/SDA signal
×
×
MONO
SP
×
×
×
×
×
SP
×
×
AC
×
×
×
Control pins/SDA signal
1
AC
1
×
×
BASS
×
×
×
SUR
×
×
QS7785PF/CF
BASS
MUTE
0
1
0
1
1
1
PSAVE
on both front and surround speakers. In mode 11, the
stereo signal is output on surround speakers only.
In output mode 12, the input stereo signal is output
on front speakers, and a surround effect enhanced
signal is output on the surround speakers.
Bass boost OFF
FROUT/FLOUT
0
0
1
Bass boost ON
SP
×
×
FROUT/FLOUT
Available
–
–
Bass boost OFF
SROUT/SLOUT
Bass boost ON
Output signal
NIPPON PRECISION CIRCUITS—9
SROUT/SLOUT
AC
Output signal
0
1
Available
–
–
Bass boost OFF
(RIN + LIN) / 2
Bass boost ON
Output signal
COUT
COUT
Available
COUT
–
–
–