MAX9888 Maxim Integrated Products, MAX9888 Datasheet - Page 68

• Manufacturer Part Number: MAX9888
• Description: Stereo Audio CODEC
• Manufacturer: Maxim Integrated Products

DataSheet.in
Enable sidetone during full-duplex operation to add a
low-level copy of the recorded audio signal to the play-
back audio signal (Figure 14). Sidetone is commonly
Figure 14. Sidetone Block Diagram
Stereo Audio CODEC
with FLEXSOUND Technology
Table 7. ADC Record Level Control Register
68
REGISTER
0x2F/0x30
ADLEN
ADREN
BIT
5
4
3
2
1
0
ADCL
ADCR
AVLG/AVRG
AVL/AVR
AUTOMATIC
NAME
CONTROL
GAIN
SIDETONE
AVLG: 0/6/12/18dB
AVL: 3dB TO -12dB
AVRG: 0/6/12/18dB
AVR: 3dB TO -2dB
DSTS
NOISE GATE
FILTERS
AUDIO/
VOICE
Left/Right ADC Gain
00 = 0dB
01 = 6dB
10 = 12dB
11 = 18dB
Left/Right ADC Level
MIX
MODE1
AVFLT
DVST:
0dB TO -60dB
VALUE
Sidetone
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
PARAMETRIC
5-BAND
+
EQ
EQ1EN
EXCURSION LIMITER
MULTIBAND ALC
DV1G:
0/6/12/18dB
DVEQ1:
0dB TO -15dB
used in telephony to allow the speaker to hear himself
speak, providing a more natural user experience. The
IC implements sidetone digitally. Doing so helps prevent
unwanted feedback into the playback signal path and
better matches the playback audio signal.
GAIN (dB)
PARAMETRIC
5-BAND
DV2:
0dB TO -15dB
DV1:
0dB TO -15dB
+3
+2
+1
EQ
-1
-2
-3
-4
0
EQ2EN
DVEQ2:
0dB TO -15dB
DESCRIPTION
MODE1
DVFLT
DCB2
FILTERS
FILTERS
AUDIO/
AUDIO/
VOICE
VALUE
0xA
0xB
0xC
0xD
0x8
0x9
0xE
0xF
MIXDAL
MIXDAR
MIX
MIX
DALEN
DAREN
DACL
DACR
GAIN (dB)
-10
-11
-12
-5
-6
-7
-8
-9