wm8918 Wolfson Microelectronics plc, wm8918 Datasheet - Page 161
wm8918
Manufacturer Part Number
wm8918
Description
Ultra Low Power Dac For Portable Audio Applications
Manufacturer
Wolfson Microelectronics plc
Datasheet
1.WM8918.pdf
(175 pages)
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Production Data
Register 7Ch GPIO Control 4
Register 7Eh Digital Pulls
w
R124 (7Ch)
Digital Pulls
REGISTER
REGISTER
R126 (7Eh)
ADDRESS
ADDRESS
Control 4
GPIO
BIT
BIT
3:0
9
8
7
7
6
5
4
3
2
1
0
GPIO_BCLK_S
AIFRXDAT_PU
AIFRXDAT_PD
GPIO_BCLK_
MODE_ENA
LRCLK_PU
LRCLK_PD
GPI7_ENA
GPI8_ENA
MCLK_PU
MCLK_PD
BCLK_PU
BCLK_PD
LABEL
LABEL
EL[3:0]
DEFAULT
DEFAULT
0000
0
0
0
0
0
0
0
0
0
0
0
GPI7 input enable
0 = disabled
1 = enabled
GPI8 input enable
0 = disabled
1 = enabled
Selects BCLK/GPIO4 pin function
0 = BCLK/GPIO4 is used as BCLK
1 = BCLK/GPIO4 is used as GPIO. MCLK provides the
BCLK in the AIF in this mode.
GPIO_BCLK function select:
0000 = Input Pin (deafult)
0001 = Clock output (f=SYSCLK/OPCLKDIV)
0010 = Logic '0'
0011 = Logic '1'
0100 = IRQ
0101 = FLL Lock
0110 = Mic Detect
0111 = Mic Short
1000 = DMIC clock out
1001 = FLL Clock Output
1010 to 1111 = Reserved
MCLK pull-up resistor enable
0 = pull-up disabled
1 = pull-up enabled
MCLK pull-down resistor enable
0 = pull-down disabled
1 = pull-down enabled
AIFRXDAT pull-up resistor enable
0 = pull-up disabled
1 = pull-up enabled
AIFRXDAT pull-down resistor enable
0 = pull-down disabled
1 = pull-down enabled
LRCLK pull-up resistor enable
0 = pull-up disabled
1 = pull-up enabled
LRCLK pull-down resistor enable
0 = pull-down disabled
1 = pull-down enabled
BCLK pull-up resistor enable
0 = pull-up disabled
1 = pull-up enabled
BCLK pull-down resistor enable
0 = pull-down disabled
1 = pull-down enabled
DESCRIPTION
DESCRIPTION
PD, Rev 4.0, September 2010
REFER TO
REFER TO
WM8918
161
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