AVR 3550 - Harman Kardon Audio Service Manual (repair manual). Page 8

No.

Pin Name

I/O

Function

1

LOUT1-

O

DAC1 Lch Negative Analog Output Pin

2

LOUT1+

O

DAC1 Lch Positive Analog Output Pin

3

DZFL2

O

DAC2 Lch Zero Input Detect Pin

4

DZFR1

O

DAC1 Rch Zero Input Detect Pin

5

DZFL1

O

DAC1 Lch Zero Input Detect Pin

6

CAD0

I

Chip Address 0 Pin

7

CAD1

I

Chip Address 1 Pin

8

PDN

I

Power-Down & Reset Pin
    When “L”, the AK4356 is powered-down and the control registers are reset to
    default state. If the state of CAD0-1 changes, then the AK4356 must be reset by PDN.

9

BICK

I

Audio Serial Data Clock Pin

10

MCLK

I

Master Clock Input Pin

11

DVDD

-

Digital Power Supply Pin, +4.75

~+5.25V

12

DVSS

-

Digital Ground Pin

13

SDTI1

I

DAC1 Audio Serial Data Input Pin

14

SDTI2

I

DAC2 Audio Serial Data Input Pin

15

SDTI3

I

DAC3 Audio Serial Data Input Pin

16

LRCK

I

Audio Input Channel Clock Pin

17

SMUTE

I

Soft Mute Pin                                      (Note)
    When this pin goes to “H”, soft mute cycle is initialized.
    When returning to “L”, the output mute releases.

18

CCLK

I

Control Data Clock Pin

19

CDTI

I

Control Data Input Pin

20

CSN

I

Chip Select Pin
    This pin should be held to “H” except for access.