QS7785PF/CF

NIPPON PRECISION CIRCUITS—3

PIN DESCRIPTION

Number

Name

I/O

Description

Parallel

Serial

1

QXCC4

O

QEXPANDER C capacitor 4

2

QXDC1

I

QEXPANDER D capacitor 1

3

QXDC2

O

QEXPANDER D capacitor 2

4

QXDC3

I

QEXPANDER D capacitor 3

5

QXDC4

O

QEXPANDER D capacitor 4

6

GND

–

Ground

7

VDD

–

4.5 to 5.5V digital supply

8

P/S

I

Input mode control (HIGH: parallel, LOW: serial)

9

SP

–

I

Enhancement control (HIGH: high spread, LOW: low spread)

–

STRB

I

Serial data strobe (not applicable to QS7785CF)

10

MONO

I

Mono-to-stereo convert select (HIGH: mono to stereo mode, LOW: normal mode)

11

AC

I

Center output control (HIGH: center on, LOW: center off)

12

BYP

–

I

Bypass control (HIGH: bypass, LOW: Qsurround)

–

SDA

I/O

13

SUR

–

I

Surround speaker control (HIGH: surround speaker on, LOW: off)

–

SCL

I

Serial clock signal input

14

BASS

I

Bass boost mode control (HIGH: bass boost on, LOW: bass boost off)

15

MUTE

I

Mute signal control (HIGH: mute on, LOW: mute off)

16

PSAVE

I

Power save control (HIGH: power save on, LOW: power save off)

17

VREFOUT

O

18

NC

–

No connection

19

VREFIN

I

20

LPC

I

Center output lowpass filter

21

CIN

I

COUT output signal feedback input for front-channel output

22

COUT

O

Center signal output

23

SLOUT

O

Surround left-channel signal output

24

SROUT

O

Surround right-channel signal output

25

FLOUT

O

Front left-channel signal output

26

FROUT

O

Front right-channel signal output

27

QXBC4

O

QEXPANDER B capacitor 4

28

QXBC3

I

QEXPANDER B capacitor 3

29

QXBC2

O

QEXPANDER B capacitor 2

30

QXBC1

I

QEXPANDER B capacitor 1

31

VCC

–

5 to 13V DC analog supply

32

QXAC4

O

QEXPANDER A capacitor 4

33

QXAC3

I

QEXPANDER A capacitor 3

34

QXAC2

O

QEXPANDER A capacitor 2

35

QXAC1

I

QEXPANDER A capacitor 1

36

BASC1

I

Bass boost right-channel signal input