Cirrus Logic CS4385A - Manual (Page 44)

44 DS837F2
CS4385A
7.8.6 Mute Polarity and Detect (MUTEP1:0)
Default = 00
00 - Auto polarity detect, selected from MUTEC1 pin
01 - Reserved
10 - Active low mute polarity
11 - Active high mute polarity
Function:
Auto mute polarity detect (00)
See Section 4.11 “The MUTEC Outputs” on page 30 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.
7.9 Mute Control (Address 09h)
7.9.1 Mute (MUTE_xx)
Default = 0
0 - Disabled
1 - Enabled
Function:
The Digital-to-Analog converter output will mute when enabled. The quiescent voltage on the output will
be retained. The muting function is affected, similarly to attenuation changes, by the Soft and Zero Cross
bits. The MUTE pins will go active during the mute period according to the MUTEC bit.
7 6 5 4 3 2 1 0
MUTE_B4 MUTE_A4 MUTE_B3 MUTE_A3 MUTE_B2 MUTE_A2 MUTE_B1 MUTE_A1
0 0 0 0 0 0 0 0