WM8281 Datasheet, PDF (224/392 Pages) Cirrus Logic – Low Power Audio System with Ambient Noise Cancellation and Echo Cancellation

224
WM8281
REGISTER
ADDRESS
R3408
(0D50h)
AOD wkup
and trig
BIT
LABEL
7 MICD_CLAMP_FALL_
TRIG_STS
6 MICD_CLAMP_RISE_
TRIG_STS
DEFAULT
DESCRIPTION
0
MICDET Clamp Trigger Status
(Falling edge triggered)
Note: Cleared when a ‘1’ is written
0
MICDET Clamp Trigger Status
(Rising edge triggered)
Note: Cleared when a ‘1’ is written
5 GP5_FALL_TRIG_STS
0
GP5 Trigger Status
(Falling edge triggered)
Note: Cleared when a ‘1’ is written
4 GP5_RISE_TRIG_STS
0
GP5 Trigger Status
(Rising edge triggered)
Note: Cleared when a ‘1’ is written
3 JD1_FALL_TRIG_STS
0
JD1 Trigger Status
(Falling edge triggered)
Note: Cleared when a ‘1’ is written
2 JD1_RISE_TRIG_STS
0
JD1 Trigger Status
(Rising edge triggered)
Note: Cleared when a ‘1’ is written
Table 83 JD1, GP5 and MICDET Clamp Trigger Status Registers
Note that the de-bounce function on all inputs (including JD1, GP5 and MICDET Clamp status) use
the 32kHz clock (see “Clocking and Sample Rates”). The 32kHz clock must be enabled whenever
input de-bounce functions are required.
Note that the MCLK2 input pin is on the ‘Always-On’ domain, and is supported in Sleep mode.
(MCLK1 input is not supported in Sleep mode.)
If input de-bounce is enabled in Sleep mode, the 32kHz clock must use MCLK2 (direct) input as its
source (CLK_32K_SRC = 01).
WAKE-UP TRANSITION
A Wake-Up transition (exit from Sleep) can be associated with any of the JD1, GP5 or MICDET
Clamp trigger status bits. This is selected using the register bits described in Table 84.
REGISTER BIT
ADDRESS
LABEL
DEFAULT
DESCRIPTION
R64 (0040h) 7 WKUP_MICD_CLAMP
Wake
_FALL
Control
0
MICDET Clamp (Falling) Wake-Up
Select
0 = Disabled
1 = Enabled
6 WKUP_MICD_CLAMP
_RISE
0
MICDET Clamp (Rising) Wake-Up
Select
0 = Disabled
1 = Enabled
5 WKUP_GP5_FALL
0
GP5 (Falling) Wake-Up Select
0 = Disabled
1 = Enabled
4 WKUP_GP5_RISE
0
GP5 (Rising) Wake-Up Select
0 = Disabled
1 = Enabled
3 WKUP_JD1_FALL
0
JD1 (Falling) Wake-Up Select
0 = Disabled
1 = Enabled
2 WKUP_JD1_RISE
0
JD1 (Rising) Wake-Up Select
0 = Disabled
1 = Enabled
Table 84 JD1, GP5 and MICDET Clamp Wake-Up Control Registers
Rev 4.0