wm8918 Wolfson Microelectronics plc, wm8918 Datasheet - Page 102
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
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Table 66 FLL Register Map
R118 (76h)
FLL Control 3
R119 (77h)
FLL Control 4
R120 (78h)
FLL Control 5
REGISTER
ADDRESS
15:0
14:5
BIT
2:0
3:0
4:3
1:0
FLL_CLK_REF_
FLL_CLK_REF_
FLL_GAIN [3:0]
FLL_FRATIO
FLL_K [15:0]
FLL_N [9:0]
SRC [1:0]
DIV [1:0]
LABEL
[2:0]
DEFAULT
0000h
177h
111
0h
00
00
F
000 = divide by 1
001 = divide by 2
010 = divide by 4
011 = divide by 8
1XX = divide by 16
000 recommended for F
100 recommended for F
Fractional multiply for F
(MSB = 0.5)
Integer multiply for F
(LSB = 1)
Gain applied to error
0000 = x 1 (Recommended value)
0001 = x 2
0010 = x 4
0011 = x 8
0100 = x 16
0101 = x 32
0110 = x 64
0111 = x 128
1000 = x 256
Recommended that these are not
changed from default.
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
VCO
clock divider
PD, Rev 4.0, September 2010
DESCRIPTION
REF
REF
Production Data
REF
REF
> 1MHz
< 64kHz
102
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