MOSA

MS6334/6335

16-Bit Stereo Audio DAC integrated HP Driver with Volume Control

REV 1.0

11

www.mosanalog.com

Set attenuation of right channel at –22.5dB. Volume control code = 4CH.

Stop

Start

Chip Address

ACK

0

1

0

0

0

0

1

1

R-ch, -22.5dB

ACK

Preparation for power off. Code = 82H or 83H.

Stop

Start

Chip Address

ACK

1

0

0

0

1

x

00

Power Off Preparation = 1

ACK

FM application. OPAmp active, HP active. DAC inactive, DAC mute off. Code = 65H.

The chip enters line-in mode.

Stop

Start

Chip Address

ACK

0

1

1

0

0

1

01

HPPD = 0

OPAmp = 0

ACK

Power down mode (shut down mode). Code = 6FH

The chip enters power down mode. The shut down current is approximately 11uA.

Stop

Start

Chip Address

ACK

0

1

1

0

1

1

11

DACM = 1

DACPD = 1

HPPD =1

OPAmp =1

ACK

SPI BUS INTERFACE

In SPI mode, SCL is serial clock, SDA is serial data and AO/CS latches the data word into the MS6334. A control word

consist of 16bit, starting with the MSB. The data bits are latched on the rising edge of SCL. A rising edge of AO/CS

latches the data into the MS6334 after sixteenth rising clock edge.

15

14

13

10

9

8

MSB

CS/AO

SCL

SDA

73

2

12

11

5

64

0

1

LSB

Fig.5

SPI format

SPI data word description

MSB

LSB

b15

b14

b13

b12

b11

b10

b9

b8

b7

b6

b5

b4

b3

b2

b1

b0

0

0

0

0

0

0

0

0