max97236 Maxim Integrated Products, Inc., max97236 Datasheet - Page 17

• Manufacturer Part Number: max97236
• Description: Audio Amplifier With Jack Detection
• Manufacturer: Maxim Integrated Products, Inc.

Table 3. Register Map
Removing the headphone jack slowly can cause a false
trigger of the key switch encoder because the right speaker
between RING1 and RING2 shorts between microphone
bias and ground. The programmable delay time must be
set by the system to mask out this slow removal so that
an interrupt does not flag until the JKIN status bit tells the
system the jack is unplugged.
and interrupt reporting for a slow jack removal event. The
act of microphone bias flying all the way up is the trigger
for a microphone removal event. The
Configuration Algorithm
sensing jack removal.
Keyscan Clock
Keyscan Clock
Keyscan Clock
Keyscan Delay
For Expansion
For Expansion
For Expansion
For Expansion
For Expansion
For Expansion
For Expansion
For Expansion
For Expansion
Right Volume
Divider ADC
Left Volume
Microphone
REGISTER
IRQ Mask1
IRQ Mask2
Debounce
Vendor ID
Divider 1
Divider 2
Keyscan
Register
Status1
Status2
Status3
ILINE_L
LINE_L
L = R
IJKIN
JKIN
B7
—
—
—
—
—
IDDONE
section explains more about
ILINE_R
DDONE
LINE_R
MUTER
MUTEL
GAIN
Audio Amplifier with Jack Detection
B6
—
—
—
Figure 9
ID
Slow Jack Removal
IHP_L
HP_L
IVOL
VOL
Jack Detection and
B5
—
—
—
shows the timing
IHP_R
HP_R JACKSWINC
B4
MICR
—
—
—
—
—
KEY_DIV_HIGH
KEY_DIV_LOW
KEY_DIV_ADC
For expansion
For expansion
For expansion
For expansion
For expansion
For expansion
For expansion
KEY_DEB
KEY_DEL
IJACKSW
MIC_IN
IMIC
B3
—
—
—
—
RVOL
LVOL
Figure 9. Slow Jack Removal Timing
JACKSW
JACKSW IMCSW
V
GND
BIAS
BIAS
IKEY
KEY
B2
—
—
—
—
Register and Bit Descriptions
MCSW
ADC CONVERT
t
B1
DEB
—
—
—
—
—
—
GND
IMBH
t
MBH
DELAY
B0
—
—
—
—
—
—
JKIN RELEASE IRQ
ADDRESS DEFAULT R/W
NOTE: ONE INTERRUPT DETERMINED
BY THE AUTODETECT CIRCUIT
0x0C
0x0D
0x0A
0x0B
0x0E
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x0F
0x10
0x11
0x12
0x13
0x14
0x15
0x16
0xC0
0x00
0x00
0x00
0x00
0x00
0x40
0x00
0x00
0x90
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
—
—
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
—
—
R
R
R
R
17