CS4245
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 Table 16 .
PGASoft
0
0
1
1
PGAZeroCross
0
1
0
1
Mode
Changes to affect immediately
Zero Cross enabled
Soft Ramp enabled
Soft Ramp and Zero Cross enabled (default)
Table 16. PGA Soft Cross or Zero Cross Mode Selection
6.9.2
Analog Input Selection (Bits 2:0)
Function:
These bits are used to select the input source for the PGA and ADC. Please see Table 17 .
Sel2
0
0
0
0
1
1
1
1
Sel1
0
0
1
1
0
0
1
1
Sel0
0
1
0
1
0
1
0
1
PGA/ADC Input
Microphone-Level Inputs (+32 dB Gain Enabled)
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
Reserved
Table 17. Analog Input Multiplexer Selection
6.10
6.11
DAC Channel A Volume Control - Address 0Ah
DAC Channel B Volume Control - Address 0Bh
7
Vol7
6
Vol6
5
Vol5
4
Vol4
3
Vol3
2
Vol2
1
Vol1
0
Vol0
6.11.1
48
Volume Control (Bits 7:0)
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
DS656F3
相关PDF资料
CDB42L55 BOARD EVAL FOR CS42L55 CODEC
CDB44L11 EVALUATION BOARD FOR CS44L11
CDB48500-USB KIT USB EVALUATION FOR CDB48500
CDB5378 EVALUATION BOARD FOR CS5378
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CDB5467U BOARD EVAL FOR CS5467 ADC
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