NJU8721

- 2 -

! TERMINAL DESCRIPTION

No.

SYMBOL

I/O

FUNCTION

1

STBY

I

Standby Control Terminal

Low : Standby ON

High : Standby OFF

2

TEST

I

Manufacturer Testing Terminal

Normally connect to GND.

3

−

4

O

Rch Output Terminal

5

−

6

−

7

O

Lch Output terminal

8

−

9

MODE

I

Control Mode selection Terminal

Low : Parallel Control Mode

High : Serial Control Mode

10

RST

I

Reset Terminal

Low : Reset ON

High : Reset OFF

11

−

12

MCK

I

Master Clock Input Terminal

13

BCK

I

Serial Audio Data Bit Clock Input Terminal

This clock must synchronize with MCK input signal.

14

LRCK

I

L/R Channel Clock Input Terminal

This clock must synchronize with MCK input signal.

15

DIN

I

Serial Audio Data Input Terminal

16

MUTE

I

Mute Control Terminal

Low : Mute ON

High : Mute OFF

17

F2/SCK

I

MODE=”Low”

: Serial Audio Interface Format Selection Terminal 2

MODE=”High”

: Control Register Data Shift Clock Input Terminal

The data is fetched into the control register by rise edge of SCK

signal.

18

F1/REQ

I

MODE=”Low”

: Serial Audio Interface Format Selection Terminal 1

MODE=”High”

: Control Register Data Request Input Terminal

19

F0/DATA

I

MODE=”Low”

: Serial Audio Interface Format Selection Terminal 0

MODE=”High”

: Control Register Data Input Terminal

20

−

! INPUT TERMINAL STRUCTURE

Input Terminal

Inside Circuit