Production Data
WM8945
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
LDO Enable
0 = Disabled
1 = Enabled
R53 (35h)
LDO
15
LDO_ENA
0
LDO Voltage reference select
0 = VMID (normal)
14
LDO_REF_SE
L_FAST
0
1 = VMID (fast start)
This field is only effective when LDO_REF_SEL = 0
LDO Voltage reference select
0 = VMID
13
12
5
LDO_REF_SE
L
0
1 = Bandgap
LDO Output float
LDO_OPFLT
0
0
0 = Disabled (Output discharged when disabled)
1 = Enabled (Output floats when disabled)
LDO Bias Source select
0 = Master Bias
LDO_BIAS_SR
C
1 = Start-Up Bias
LDO Voltage select
4:0
LDO_VSEL
[4:0]
0_0111
(Sets the LDO output as a ratio of the selected voltage
reference. The voltage reference is set by
LDO_REF_SEL.)
00111 = Vref x 1.97 (default)
Register 35h LDO
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
Bandgap Reference Control
0 = Disabled
R54 (36h)
Bandgap
15
BG_ENA
0
1 = Enabled
Bandgap Voltage select
(Sets the Bandgap voltage)
00000 = 1.200V
4:0
BG_VSEL[4:0]
0_1010
… 26.7mV steps
01010 = 1.467V (default)
…
01111 = 1.600V
10000 to 11111 = reserved
(See Table 38 for values)
Register 36h Bandgap
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
Touch Panel Enable
0 = Disabled
R55 (37h)
Touch
Control 1
15
TCH_ENA
0
1 = Enabled
Touch Panel Conversion Enable
0 = Disabled
14
TCH_CVT_EN
A
0
1 = Enabled
In automatic mode, conversions are enabled by setting
this bit.
In manual mode (TCH_RATE = 0), setting this bit will
PD, May 2011, Rev 4.1
139
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
