wm8918 Wolfson Microelectronics plc, wm8918 Datasheet - Page 160
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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WM8918
Register 78h FLL Control 5
Register 79h GPIO Control 1
w
FLL Control
REGISTER
REGISTER
R120 (78h)
R121 (79h)
ADDRESS
ADDRESS
Control 1
GPIO
5
BIT
BIT
4:3
1:0
3:0
5
4
FLL_CLK_REF
FLL_CLK_REF
GPIO1_SEL[3:
GPIO1_PU
GPIO1_PD
_SRC[1:0]
_DIV[1:0]
LABEL
LABEL
0]
DEFAULT
DEFAULT
0100
00
00
0
1
FLL Clock Reference Divider
00 = MCLK / 1
01 = MCLK / 2
10 = MCLK / 4
11 = MCLK / 8
MCLK (or other input reference) must be divided down
to <=13.5MHz.
For lower power operation, the reference clock can be
divided down further if desired.
FLL Clock source
00 = MCLK
01 = BCLK
10 = LRCLK
11 = Reserved
GPIO1 pull-up resistor enable
0 = pull-up disabled
1 = pull-up enabled
GPIO1 pull-down resistor enable
0 = pull-down disabled
1 = pull-down enabled
GPIO1 Function Select
0000 = Input pin
0001 = Clock output (f=SYSCLK/OPCLKDIV)
0010 = Logic '0'
0011 = Logic '1'
0100 = IRQ (deafult)
0101 = FLL Lock
0110 = Mic Detect
0111 = Mic Short
1000 = DMIC clock out
1001 = FLL Clock Output
1010 to 1111 = Reserved
DESCRIPTION
DESCRIPTION
PD, Rev 4.0, September 2010
REFER TO
REFER TO
Production Data
160
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