QS7785 NPC [Nippon Precision Circuits Inc], QS7785 Datasheet - Page 3

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

PIN DESCRIPTION
Number
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
1
2
3
4
5
6
7
8
9
Parallel
SUR
BYP
SP
–
–
–
VREFOUT
VREFIN
QXCC4
QXDC1
QXDC2
QXDC3
QXDC4
SROUT
FROUT
QXBC4
QXBC3
QXBC2
QXBC1
PSAVE
SLOUT
FLOUT
QXAC4
QXAC3
QXAC2
QXAC1
BASC1
MONO
MUTE
COUT
Name
BASS
GND
VDD
VCC
LPC
P/S
CIN
NC
AC
Serial
STRB
SDA
SCL
–
–
–
I/O
I/O
O
O
O
O
O
O
O
O
O
O
O
O
O
–
–
–
–
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
QEXPANDER C capacitor 4
QEXPANDER D capacitor 1
QEXPANDER D capacitor 2
QEXPANDER D capacitor 3
QEXPANDER D capacitor 4
Ground
4.5 to 5.5V digital supply
Input mode control (HIGH: parallel, LOW: serial)
Enhancement control (HIGH: high spread, LOW: low spread)
Serial data strobe (not applicable to QS7785CF)
Mono-to-stereo convert select (HIGH: mono to stereo mode, LOW: normal mode)
Center output control (HIGH: center on, LOW: center off)
Bypass control (HIGH: bypass, LOW: Qsurround)
Serial data input (also serves as ACK signal output for I
Surround speaker control (HIGH: surround speaker on, LOW: off)
Serial clock signal input
Bass boost mode control (HIGH: bass boost on, LOW: bass boost off)
Mute signal control (HIGH: mute on, LOW: mute off)
Power save control (HIGH: power save on, LOW: power save off)
V
No connection
V
Center output lowpass filter
COUT output signal feedback input for front-channel output
Center signal output
Surround left-channel signal output
Surround right-channel signal output
Front left-channel signal output
Front right-channel signal output
QEXPANDER B capacitor 4
QEXPANDER B capacitor 3
QEXPANDER B capacitor 2
QEXPANDER B capacitor 1
5 to 13V DC analog supply
QEXPANDER A capacitor 4
QEXPANDER A capacitor 3
QEXPANDER A capacitor 2
QEXPANDER A capacitor 1
Bass boost right-channel signal input
CC
CC
QS7785PF/CF
/2 reference voltage output
/2 reference voltage output (biased internally to V
Description
NIPPON PRECISION CIRCUITS—3
CC
2
/2)
C bus)