CS4398-CZZR Cirrus Logic Inc, CS4398-CZZR Datasheet - Page 34

• Manufacturer Part Number: CS4398-CZZR
• Description: IC,D/A CONVERTER,DUAL,24-BIT,TSSOP,28PIN
• Manufacturer: Cirrus Logic Inc

34
7.4.5
7.5
7.6
7.6.1
VOL7
7
0
Channel A Volume Control - Register 05h
Channel B Volume Control - Register 06h
MUTE Polarity and DETECT (MUTEP1:0) Bits 1-0
Default = 00
00 - Auto polarity detect, selected from AMUTEC pin
01 - Reserved
10 - Active low mute polarity
11 - Active high mute polarity
Function:
Auto mute polarity detect (00)
See section 4.3 on page 20 for description.
Active low mute polarity (10)
When RST is low, the outputs are high-impedance and will need to be biased active. Once reset has been
released and after this bit is set, the MUTEC output pins will be active low polarity.
Active high mute polarity (11)
At reset time, the outputs are high-impedance and will need to be biased active. Once reset has been
released and after this bit is set, the MUTEC output pins will be active high polarity.
Digital Volume Control (VOL7:0) Bits 7-0
Default = 00h (0 dB)
Function:
The Digital Volume Control registers allow independent control of the signal levels in 1/2 dB increments
from 0 to -127.5 dB. Volume settings are decoded as shown in Table 7. The volume changes are imple-
mented as dictated by the Soft and Zero Cross bits in the Power and Muting Control register. Note that
the values in the volume setting column in Table 7 are approximate. The actual attenuation is determined
by taking the decimal value of the volume register and multiplying by 6.02/12.
VOL6
6
0
Binary Code
VOL5
00000000
00000001
00000110
5
0
11111111
Table 7. Example Digital Volume Settings
VOL4
4
0
Decimal Value
255
VOL3
0
1
6
3
0
VOL2
Volume Setting
2
0
-127.5 dB
-0.5 dB
-3.0 dB
0 dB
VOL1
1
0
CS4398
VOL0
DS568F1
0
0