wm8400 Wolfson Microelectronics plc, wm8400 Datasheet - Page 183

• Manufacturer Part Number: wm8400
• Description: Wolfson Audioplustm Hi-fi Audio Codec And Power Management Unit For Mobile Multimedia
• Manufacturer: Wolfson Microelectronics plc

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Pre-Production
R58 (3Ah)
Microphone
Bias
R59 (3Bh)
Reserved
R60 (3Ch)
FLL Control 1
REGISTER
ADDRESS
0
15:8
7:6
5:3
2
1
0
15:0
15:13
12
11:10
9
8
BIT
VMIDTOG
MCDSCTH
[1:0]
MDCTHR
[2:0]
MCD
MBSEL
FLL_REF_FREQ
FLL_CLK_SRC
FLL_FRAC
FLL_OSC_ENA
LABEL
0b
0000_000
0b
00b
000b
0b
0b
0b
0000h
0h
1
0b
0b
DEFAULT
Connects VMID to ground
0 = Disabled
1 = Enabled
Reserved - Do Not Change
MICBIAS Short Circuit Detect Threshold
00 = 450uA
01 = 850uA
10 = 1250uA
11 = 1650uA
These values are for AVDD=3.0V
MICBIAS Current Detect Threshold
000 = 220uA
001 = 330uA
010 = 440uA
011 = 550uA
100 = 660uA
101 = 770uA
110 = 880uA
111 = 990uA
These values are for AVDD=3.0V
MICBIAS Current and Short Circuit Detect Enable
0 = disabled
1 = enabled
Reserved - Do Not Change
Microphone Bias Voltage Control
0 = 0.9 * AVDD
1 = 0.65 * AVDD
Reserved - Do Not Change
Reserved - Do Not Change
Low frequency reference locking
0 = Lock achieved after 509 ref clks (Recommended for
Reference clock > 48kHz)
1 = Lock achieved after 49 ref clks (Recommended for
Reference clock <= 48kHz)
FLL Clock source
00 = MCLK
01 = DAC LRCLK
10 = ADC LRCLK
11 = GPIO6
Fractional enable
0 = Integer Mode
1 = Fractional Mode
1 recommended in all cases
FLL Analogue enable
0 = FLL disabled
1 = FLL enabled
FLL_OSC_ENA must be enabled before enabling FLL_ENA.
The order is important.
DESCRIPTION
PP, April 2009, Rev 3.0
WM8400
183