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WM8994ECS/R 数据表(PDF) 276 Page - Cirrus Logic

部件名 WM8994ECS/R
功能描述  Multi-channel Audio Hub CODEC for Smartphones
PDF  363 Pages
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制造商  CIRRUS [Cirrus Logic]
网页  http://www.cirrus.com
标志 CIRRUS - Cirrus Logic

WM8994ECS/R 数据表(HTML) 276 Page - Cirrus Logic

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WM8994
276
Rev 4.6
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
R55 (37h)
Additional
Control
7
LINEOUT1_FB
0
Enable ground loop noise feedback on LINEOUT1
0 = Disabled
1 = Enabled
6
LINEOUT2_FB
0
Enable ground loop noise feedback on LINEOUT2
0 = Disabled
1 = Enabled
0
VROI
0
Buffered VMID to Analogue Line Output Resistance
(Disabled Outputs)
0 = 20k
 from buffered VMID to output
1 = 500
 from buffered VMID to output
Register 37h Additional Control
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
R56 (38h)
AntiPOP (1)
7
LINEOUT_VMID
_BUF_ENA
0
Enables VMID reference for line outputs in single-ended
mode
0 = Disabled
1 = Enabled
6
HPOUT2_IN_EN
A
0
HPOUT2MIX Mixer and Input Stage Enable
0 = Disabled
1 = Enabled
5
LINEOUT1_DIS
CH
0
Discharges LINEOUT1P and LINEOUT1N outputs
0 = Not active
1 = Actively discharging LINEOUT1P and LINEOUT1N
4
LINEOUT2_DIS
CH
0
Discharges LINEOUT2P and LINEOUT2N outputs
0 = Not active
1 = Actively discharging LINEOUT2P and LINEOUT2N
Register 38h AntiPOP (1)
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
R57 (39h)
AntiPOP (2)
8
MICB2_DISCH
0
Microphone Bias 2 Discharge
0 = MICBIAS2 floating when disabled
1 = MICBIAS2 discharged when disabled
7
MICB1_DISCH
0
Microphone Bias 1 Discharge
0 = MICBIAS1 floating when disabled
1 = MICBIAS1 discharged when disabled
6:5
VMID_RAMP
[1:0]
00
VMID soft start enable / slew rate control
00 = Normal slow start
01 = Normal fast start
10 = Soft slow start
11 = Soft fast start
If VMID_RAMP = 1X is selected for VMID start-up or shut-
down, then the soft-start circuit must be reset by setting
VMID_RAMP=00 after VMID is disabled, before VMID is re-
enabled. VMID is disabled / enabled using the VMID_SEL
register.
3
VMID_BUF_EN
A
0
VMID Buffer Enable
0 = Disabled
1 = Enabled (provided VMID_SEL > 00)
2
STARTUP_BIAS
0
Enables the Start-Up bias current generator



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