SGTL5000XNAA3R2 Datasheet, PDF (55/68 Pages) Freescale Semiconductor, Inc – Low Power Stereo Codec with Headphone Amp

FUNCTIONAL DEVICE OPERATION
PROGRAMMING EXAMPLES
Table 56. DAP_AVC_CTRL 0x0124
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RSVD RSVD MAX_GAIN
RSVD
LBI_RESPONSE
RSVD
RSVD
EN
BITS
15
14
13:12
11:10
9:8
7:6
5
4:1
0
FIELD
RSVD
RSVD
MAX_GAIN
RSVD
LBI_RESPONSE
RSVD
HARD_LIMIT_EN
RSVD
EN
RW RESET
DEFINITION
RO
0x0
Reserved
RW
0x1
Reserved.
RW
0x1
Maximum gain that can be applied by the AVC in expander mode.
0x0 = 0 dB gain
0x1 = 6.0 dB of gain
0x2 = 12 dB of gain
RO
0x0
Reserved
RW
0x1
Integrator Response
0x0 = 0 mS LBI
0x1 = 25 mS LBI
0x2 = 50 mS LBI
0x3 = 100 mS LBI
RO
0x0
Reserved
RW
0x0
Enable Hard Limiter Mode
0x0 = Hard limit disabled. AVC Compressor/Expander is enabled.
0x1 = Hard limit enabled. The signal is limited to the programmed threshold. (Signal
saturates at the threshold)
RO
0x0
Reserved
RW
0x0
Enable/disable AVC
0x0 = Disable
0x1 = Enable
Table 57. DAP_AVC_THRESHOLD 0x0126
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
THRESH
BITS
15:0
FIELD
THRESH
RW RESET
DEFINITION
RW 0x1473 AVC Threshold Value
Threshold is programmable. Use the following formula to calculate hex value:
Hex Value = ((10^(THRESHOLD_dB/20))*0.636)*2^15
Threshold can be set in the range of 0 dB to -96 dB
Example Values:
0x1473 = Set Threshold to -12 dB
0x0A40 = Set Threshold to -18 dB
Analog Integrated Circuit Device Data
Freescale Semiconductor
SGTL5000
55