CS4245-CQZR Cirrus Logic Inc, CS4245-CQZR Datasheet - Page 47

• Manufacturer Part Number: CS4245-CQZR
• Description: IC,Soundcard Circuits,QFP,48PIN,PLASTIC
• Manufacturer: Cirrus Logic Inc

DS656F2
6.9.2
6.10
6.11
6.11.1 Volume Control (Bits 7:0)
Vol7
7
DAC Channel A Volume Control - Address 0Ah
See
DAC Channel B Volume Control - Address 0Bh
occur after a time-out period between 512 and 1024 sample periods (10.7 ms to 21.3 ms at 48 kHz sam-
ple rate) if the signal does not encounter a zero crossing. The zero cross function is independently mon-
itored and implemented for each channel. See
Analog Input Selection (Bits 2:0)
Function:
These bits are used to select the input source for the PGA and ADC. Please see
Function:
The digital volume control allows the user to attenuate the signal in 0.5 dB increments from 0 to -127 dB.
The Vol0 bit activates a 0.5 dB attenuation when set, and no attenuation when cleared. The Vol[7:1] bits
activate attenuation equal to their decimal equivalent (in dB). Example volume settings are decoded as
6.11 DAC Channel B Volume Control - Address
Sel2
PGASoft
0
0
0
0
1
1
1
1
0
0
1
1
Vol6
6
Sel1
0
0
1
1
0
0
1
1
Table 15. PGA Soft Cross or Zero Cross Mode Selection
PGAZeroCross
Vol5
5
Sel0
0
1
0
1
Table 16. Analog Input Multiplexer Selection
0
1
0
1
0
1
0
1
Vol4
4
Changes to affect immediately
Zero Cross enabled
Soft Ramp enabled
Soft Ramp and Zero Cross enabled (default)
Table
Microphone-Level Inputs (+32 dB Gain Enabled)
0Bh.
Vol3
15.
3
Line-Level Input Pair 1
Line-Level Input Pair 2
Line-Level Input Pair 3
Line-Level Input Pair 4
Line-Level Input Pair 5
Line-Level Input Pair 6
PGA/ADC Input
Mode
Reserved
Vol2
2
Vol1
Table
1
16.
CS4245
Vol0
0
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