WM8998 Datasheet, PDF (52/307 Pages) Wolfson Microelectronics plc – High Performance Audio Hub CODEC

WM8998
Production Data
DIGITAL MICROPHONE INTERFACE PULL-DOWN
The WM8998 provides integrated pull-down resistors on the DMICDAT1 and DMICDAT2 pins. This
provides a flexible capability for interfacing with other devices.
Each of the pull-down resistors can be configured independently using the register bits described in
Table 6. Note that, if the DMICDAT1 or DMICDAT2 digital microphone input paths are disabled, then
the pull-down will be disabled on the respective pin.
REGISTER BIT
ADDRESS
LABEL
DEFAULT
DESCRIPTION
R3106
(0C22h)
Misc Pad
Ctrl 3
1 DMICDAT2_PD
0 DMICDAT1_PD
0
DMICDAT2 Pull-Down Control
0 = Disabled
1 = Enabled
0
DMICDAT1 Pull-Down Control
0 = Disabled
1 = Enabled
Table 6 Digital Microphone Interface Pull-Down Control
w
PD, October 2014, Rev 4.0
52