MAX9853 Maxim Integrated Products, MAX9853 Datasheet - Page 50

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

Stereo Audio CODECs with Microphone, DirectDrive
Headphones, Speaker Amplifiers, or Line Outputs
Table 20 shows the possible mixing configurations of
the analog input signals at the ADC. Each of the four
input signals can be routed to either the left or right
ADC independently in any combination. The ADC will
Table 18. Vibe Threshold
Table 19. Audio Mixer Bit Descriptions
Table 20. ADC Input Mixer
50
X = Don’t care.
Line 1
Line 2
Left Microphone
Right Microphone
0x0A
0x0B
REG
______________________________________________________________________________________
INPUT SOURCE
0x1D
0x1C
0x1F
0x1E
0x1B
0x1A
0x19
0x18
0x17
0x16
0x15
0x14
0x13
0x12
0x11
0x10
VTH
B7
LEFT ADC (REGISTER 0x0A,
THRESHOLD VALUE
B6
31/32 x FS
30/32 x FS
29/32 x FS
28/32 x FS
27/32 x FS
26/32 x FS
25/32 x FS
24/32 x FS
23/32 x FS
22/32 x FS
21/32 x FS
20/32 x FS
19/32 x FS
18/32 x FS
17/32 x FS
16/32 x FS
Bits B7–B4)
MXOUTL
MXINL
MIXINL
1XXX
X1XX
XX1X
XXX1
B5
RIGHT ADC (REGISTER 0x0A,
B4
provide erroneous results if the microphones are
selected as a mixer input while the microphone circuit
is not enabled.
Bits B3–B0)
MIXINR
Left and Right ADC Input Mixer (MXINL/MXINR)
1XXX
X1XX
XX1X
XXX1
0x0D
0x0C
0x0B
0x0A
0x0F
0x0E
0x09
0x08
0x07
0x06
0x05
0x04
0x03
0x02
0x01
0x00
VTH
B3
Analog Mixer Registers (0x0A, 0x0B)
B2
Mix line input 1
Mix line input 2
Mix the left microphone input
Mix the right microphone input
MXOUTR
MXINR
THRESHOLD VALUE
DESCRIPTION
15/32 x FS
14/32 x FS
13/32 x FS
12/32 x FS
11/32 x FS
10/32 x FS
9/32 x FS
8/32 x FS
7/32 x FS
6/32 x FS
5/32 x FS
4/32 x FS
3/32 x FS
2/32 x FS
1/32 x FS
B1
0
B0