MS6334/6335
MOSA
16-Bit Stereo Audio DAC integrated HP Driver with Volume Control
Set attenuation of right channel at –22.5dB. Volume control code = 4CH.
Stop
Start
Chip Address
ACK
0
1
0
0
1
0
0
ACK
1
R-ch, -22.5dB
Preparation for power off. Code = 82H or 83H.
ACK
Stop
Start
Chip Address
ACK
1
0
0
0
0
0
1
x
Power Off Preparation = 1
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
0
1
ACK
HPPD = 0
OPAmp = 0
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
1
1
ACK
DACM = 1
DACPD = 1
HPPD =1
OPAmp =1
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.
CS/AO
SCL
15 14 13 12 11 10
MSB
9
8
7
6
5
4
3
2
1
0
SDA
LSB
Fig.5 SPI format
SPI data word description
MSB
LSB
b0
b15 b14 b13 b12 b11 b10
b9
0
b8
0
b7
b6
b5
b4
b3
b2
b1
Reference to I2C data bytes description
0
0
0
0
0
0
The initial state is the same as I2C
REV 1.0
11
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