wm8918 Wolfson Microelectronics plc, wm8918 Datasheet - Page 158

• Manufacturer Part Number: wm8918
• Description: Ultra Low Power Dac For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

WM8918
Register 70h Write Sequencer 4
Register 74h FLL Control 1
w
Sequencer 4
FLL Control
FLL Control
REGISTER
REGISTER
REGISTER
R112 (70h)
R116 (74h)
R117 (75h)
ADDRESS
ADDRESS
ADDRESS
Write
1
2
13:8
BIT
BIT
BIT
9:4
6:4
0
2
1
0
FLL_FRACN_E
FLL_OUTDIV[5
FLL_CTRL_RA
ENT_INDEX[5:
WSEQ_CURR
WSEQ_BUSY
FLL_OSC_EN
FLL_ENA
LABEL
LABEL
LABEL
TE[2:0]
NA
:0]
0]
A
DEFAULT
DEFAULT
DEFAULT
00_0000
00_0000
000
0
0
0
0
Sequence Current Index (read only):
This is the location of the most recently accessed
command in the write sequencer memory.
Sequencer Busy flag (read only):
0 = Sequencer idle
1 = Sequencer busy
Note: it is not possible to write to control registers via
the control interface while the Sequencer is Busy.
FLL Fractional enable
0 = Integer Mode
1 = Fractional Mode
Fractional Mode (FLL_FRACN_ENA=1) is
recommended in all cases
FLL Oscillator enable
0 = Disabled
1 = Enabled
FLL_OSC_ENA must be enabled before enabling
FLL_ENA.
Note that this field is required for free-running FLL
modes only.
FLL Enable
0 = Disabled
1 = Enabled
FLL_OSC_ENA must be enabled before enabling
FLL_ENA.
FLL FOUT clock divider
00_0000 = Reserved
00_0001 = Reserved
00_0010 = Reserved
00_0011 = 4
00_0100 = 5
00_0101 = 6
…
11_1110 = 63
11_1111 = 64
(FOUT = FVCO / FLL_OUTDIV)
Frequency of the FLL control block
000 = FVCO / 1 (Recommended value)
DESCRIPTION
DESCRIPTION
DESCRIPTION
PD, Rev 4.0, September 2010
REFER TO
REFER TO
REFER TO
Production Data
158