ASAHI KASEI

[AK4367]

MS0247-E-01

2004/11

- 4 -

PIN/FUNCTION

No.

Pin Name

I/O

Function

SDA

I/O

Control Data Input/Output Pin (I2C pin = “H”)

1

CDTI

I

Control Data Input Pin (I2C pin = “L”)

SCL

I

Control Data Clock Pin (I2C pin = “H”)

2

CCLK

I

Control Data Clock Pin (I2C pin = “L”)

CAD0

I

Chip Address 0 Select Pin (I2C pin = “H”)

3

CSN

I

Control Data Chip Select Pin (I2C pin = “L”)

4

SDATA

I

Audio Serial Data Input Pin

5

LRCK

I

L/R Clock Pin

This clock determines which audio channel is currently being input on SDATA pin.

6

BICK

I

Serial Bit Clock Pin

This clock is used to latch audio data.

7

MCLK

I

Master Clock Input Pin

8

PDN

I

Power-down & Reset Pin

When at “L”, the AK4367 is in power-down mode and is held in reset.

The AK4367 should always be reset upon power-up.

9

I2C

I

Control Mode Select Pin (Internal Pull-down Pin)

“H”: I

10

MOUT

O

Mono Analog Output Pin

11

VCOM

O

Common Voltage Output Pin

Normally connected to VSS pin with 0.1

µF ceramic capacitor in parallel with a 2.2µF

electrolytic capacitor.

12

MUTET

O

Mute Time Constant Control Pin

Connected to VSS pin with a capacitor for mute time constant.

13

VDD

-

Power Supply Pin

14

VSS

-

Ground Pin

15

HVDD

-

Power Supply Pin for Headphone Amp

16

HPR

O

Rch Headphone Amp Output Pin

17

HPL

O

Lch Headphone Amp Output Pin

18

MIN

I

Mono Analog Input Pin

19

RIN

I

Rch Analog Input Pin

20

LIN

I

Lch Analog Input Pin

Note: All digital input pins except analog input pins (MIN, RIN and LIN) and internal pull-down pin must not be left

floating.

Handling of Unused Pin

The unused I/O pins should be processed appropriately as below.

Classification

Pin Name

Setting

Analog

MOUT, MUTET, HPR, HPL, MIN, RIN, LIN

These pins should be open.

Digital

CAD0

These pins should be connected to VSS.