MAX97236 Datasheet, PDF (19/39 Pages) Maxim Integrated Products – Audio Amplifier with Jack Detection 25-Bump, 2.4mm x 2.3mm, 0.4mm Pitch WLP

Audio Amplifier with Jack Detection
Table 4. Configuration and Device Status Registers (continued)
REGISTER BIT
3
2
Status1
0x00
(Read Only)
1
0
7
6
5
Status2
0x01
(Read Only)
4
NAME
MIC_IN
JACKSW
MCSW
MBH
LINE_L
LINE_R
HP_L
HP_R
DESCRIPTION
Microphone Connected/Disconnected
MIC_IN reports when a microphone is connected or removed. Set the MIC_INM interrupt
mask to alert the system when the microphone load status has changed.
0 = Microphone is removed.
1 = Microphone is connected.
JACKSW Status
JACKSW reports the mechanical jack switch status. For an operational mechanical jack
switch, JACKSW flags at the same time. If the switch is broken, or if the jack is not plugged
in all the way, JACKSW and JKIN do not report the same value. The JACKSW bit also reports
when a jack has been removed. Set the PIN5M interrupt mask bit to signal the system when
the status of JACKSW changes.
0 = Mechanical jack switch reports no jack is connected.
1 = Mechanical jack switch shows that the jack is connected.
Microphone Switch Status
MCSW goes high when the microphone bias goes low for the debounce period plus the
delay period. This happens when a switch shorts across the microphone, pulling the
micbias node down, indicating a keypress from a hook switch, ADC P 4 LSB.
Resets after reading.
0 = No change in microphone bias, no switch press.
1 = Microphone bias has been pulled to ground and debounced since the last status
read. Debounce time set by KEY_DEB. Delay time set by KEY_DEL.
Multibutton Headset Status
MBH reports when a keypress from a multibutton headset is ready to be read.
Resets after reading.
0 = No active keypress detected.
1 = Active keypress has been detected.
Line-Level Load on TIP Detected
0 = Line-level load on TIP not detected.
1 = Line-level load on TIP detected.
Line-Level Load on ROUT Detected
0 = Line-level load on RING1 not detected.
1 = Line-level load on RING1 detected.
Headphone Load on TIP Detected
0 = Headphone load on TIP not detected.
1 = Headphone load on TIP detected.
Headphone Load on RING1 Detected
0 = Headphone load on RING1 not detected.
1 = Headphone load on RING1 detected.
JACKSW Incorrect
JACKSWINC reports when there are inconsistencies between the mechanical switch
and the electrical plug and unplug detection. The exception is when a plug-in occurs
3
JACKSWINC
and SHDN is LOW. JACKSWINC does NOT clear when the STATUS register is read.
JACKSW is checked at jack plug-in and unplug JACKSWINC is updated when
JACKSW is checked.
0 = JACKSW reporting is correct and correlates with JKIN.
1 = JACKSW reporting is not correct and does not correlate with JKIN.
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