MAX9853 Maxim Integrated Products, MAX9853 Datasheet - Page 51

• Manufacturer Part Number: MAX9853
• Description: (MAX9851 / MAX9853) Stereo Audio CODECs
• Manufacturer: Maxim Integrated Products

PGADS1/PGADS2 configures the gain adjustment for the
digital audio interface inputs. Code 0x00 is full signal
Table 21 shows the possible mixing configurations of
the analog audio output mixer. The sidetone, line 1, and
line 2 signals can be routed to either the left or right
Table 21. Analog Output Mixer
Table 22. Digital Audio Input Gain Bit Descriptions
Table 23. Digital Audio Input Gain Settings
X = Don’t care.
Stereo Audio CODECs with Microphone, DirectDrive
Sidetone
Line 1
Line 2
Left DAC Output
Right DAC Output
INPUT SOURCE
PGADS1/
Programmable-Gain Adjustment for Digital Audio
PGADS2
0x0C
0x0D
REG
0x1C
0x00
0x0E
0x29
0x35
0x40
0x4A
0x55
0x5E
0x67
0x70
0x78
0x7F
0x86
Headphones, Speaker Amplifiers, or Line Outputs
SETTING (dB)
______________________________________________________________________________________
B7
-10
-11
-12
-13
-1
-2
-3
-4
-5
-6
-7
-8
-9
0
LEFT AUDIO OUTPUT
(REGISTER 0x0B,
BITS B7–B4)
Inputs (PGADS1/PGADS2)
MXOUTL
Audio Gain Control Registers (0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11)
1XXX
X1XX
XX1X
XXX1
XXXX
B6
B5
PGADS1/
PGADS2
0x8D
0xAA
0xAE
0xBB
0xC2
0xC6
0xC9
0xA5
0xB3
0xB7
0xBF
0x93
0x99
0x9F
RIGHT AUDIO OUTPUT
(REGISTER 0x0B,
BITS B3–B0)
MXOUTR
B4
Left and Right Audio Output Mixer (MXOUTL/MXOUTR)
SETTING (dB)
XXXX
1XXX
X1XX
XX1X
XXX1
while 0xFF is full attenuation. This programmable-gain
adjustment follows the mono mixers. Table 23 shows
simplified gain control settings for digital signal inputs.
audio output in the combinations shown in Table 21.
The left DAC output is only available on the left audio
output and similarly for the right DAC output.
PGADS1
PGADS2
-14
-15
-16
-17
-18
-19
-20
-21
-22
-23
-24
-25
-26
-27
B3
Mix the sidetone
Mix line input 1
Mix line input 1
Mix the left DAC output to the left analog
output
Mix the right DAC output to the right analog
output
B2
DESCRIPTION
PGADS1/
PGADS2
0xCC
0xDB
0xDD
0xCF
0xD2
0xD4
0xD6
0xD9
0xDF
0xE1
0xE2
0xE4
0xE5
0xFF
B1
SETTING (dB)
Mute
-28
-29
-30
-31
-32
-33
-34
-35
-36
-37
-38
-39
-40
B0
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