WM8958 Datasheet, PDF (194/377 Pages) Wolfson Microelectronics plc – Multi-Channel Audio Hub CODEC for Smartphones

WM8958
AIF2 - DIGITAL PULL-UP AND PULL-DOWN
Pre-Production
The WM8958 provides integrated pull-up and pull-down resistors on each of the DACDAT2,
DACLRCLK2 and BCLK2 pins. This provides a flexible capability for interfacing with other devices.
Each of the pull-up and pull-down resistors can be configured independently using the register bits
described in Table 108. Note that if the Pull-up and Pull-down are both enabled for any pin, then the
pull-up and pull-down will be disabled.
Note that pull-up and pull-down resistors are also provided on the GPIO6/ADCLRCLK2 pin; this is
described in the “General Purpose Input/Output” section.
REGISTER BIT
ADDRESS
LABEL
DEFAULT
DESCRIPTION
R1794
(0702h)
Pull Control
(BCLK2)
14 BCLK2_PU
13 BCLK2_PD
0
BCLK2 Pull-up enable
0 = Disabled
1 = Enabled
1
BCLK2 Pull-down enable
0 = Disabled
1 = Enabled
R1795
14 DACLRCLK2_
0
DACLRCLK2 Pull-up enable
(0703h)
PU
0 = Disabled
Pull Control
1 = Enabled
(DACLRCLK2) _{13 DACLRCLK2_}
1
DACLRCLK2 Pull-down enable
PD
0 = Disabled
1 = Enabled
R1796
(0704h)
14 DACDAT2_PU
0
Pull Control
(DACDAT2)
13 DACDAT2_PD
1
DACDAT2 Pull-up enable
0 = Disabled
1 = Enabled
DACDAT2 Pull-down enable
0 = Disabled
1 = Enabled
Table 108 AIF2 Digital Pull-Up and Pull-Down Control
w
PP, August 2012, Rev 3.4
194