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WM8959 Datasheet(PDF) 121 Page - Wolfson Microelectronics plc

Part # WM8959
Description  Mobile Multimedia DAC with Dual-Mode Class AB/D Speaker Driver
PDF  155 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8959 Datasheet(HTML) 121 Page - Wolfson Microelectronics plc

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Pre-Production
WM8959
w
PP, May 2008, Rev 3.1
121
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
5
DIS_LLINE
0b
Discharges LOP and LON outputs via
approx 500
Ω resistor
0 = Not active
1 = Actively discharging LOP and LON
4
DIS_RLINE
0b
Discharges ROP and RON outputs via
approx 500
Ω resistor
0 = Not active
1 = Actively discharging ROP and RON
3
DIS_OUT3
0b
Discharges OUT3 output via approx 500
Ω
resistor
0 = Not active
1 = Actively discharging OUT3
2
DIS_OUT4
0b
Discharges OUT4 output via approx 500
Ω
resistor
0 = Not active
1 = Actively discharging OUT4
1
DIS_LOUT
0b
Discharges LOUT output via approx 500
Ω
resistor
0 = Not active
1 = Actively discharging LOUT
R56 (38h)
Anti-Pop (1)
0
DIS_ROUT
0b
Discharges ROUT output via approx 500
Ω
resistor
0 = Not active
1 = Actively discharging ROUT
Table 76 Output Discharge Control
VMID REFERENCE DISCHARGE CONTROL
The VMID reference can be discharged to AGND through internal resistors. Discharging VMID
ensures that a subsequent start-up procedure commences with a known voltage condition; this is
necessary in order to ensure maximum suppression of audible pops associated with start-up. VMID
is discharged by setting VMIDTOG, as described in Table 77.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R57 (39h)
Anti-Pop (2)
0
VMIDTOG
0b
Connects VMID to ground
0 = Disabled
1 = Enabled
Table 77 VMID Reference Discharge Control



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