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WM8948ECS/R bảng dữ liệu(PDF) 69 Page - Wolfson Microelectronics plc

tên linh kiện WM8948ECS/R
Giải thích chi tiết về linh kiện  Stereo Low-Power CODEC with Video Buffer and Touch Panel Controller
PDF  189 Pages
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nhà sản xuất  WOLFSON [Wolfson Microelectronics plc]
Trang chủ  http://www.wolfsonmicro.com
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WM8948ECS/R bảng dữ liệu(HTML) 69 Page - Wolfson Microelectronics plc

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Production Data
WM8948
w
PD, May 2011, Rev 4.1
69
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R2 (02h)
Power
management
1
2
VMID_BUF_ENA
0
VMID Buffer Enable.
(The buffered VMID may be applied
to disabled input and output pins.)
0 = Disabled
1 = Enabled
R42 (2Ah)
Output ctrl
13
SPKR_VMID_OP
_ENA
0
Buffered VMID to SPKOUTR
Enable
0 = Disabled
1 = Enabled
12
SPKL_VMID_OP
_ENA
0
Buffered VMID to SPKOUTL Enable
0 = Disabled
1 = Enabled
11
LINER_VMID_OP
_ENA
0
Buffered VMID to LINEOUTR
Enable
0 = Disabled
1 = Enabled
10
LINEL_VMID_OP
_ENA
0
Buffered VMID to LINEOUTL
Enable
0 = Disabled
1 = Enabled
1
SPK_VROI
0
Buffered VREF to SPKOUTL /
SPKOUTR resistance (Disabled
outputs)
0 = approx 20k
1 = approx 1k
0
LINE_VROI
0
Buffered VREF to LINEOUTL /
LINEOUTR resistance (Disabled
outputs)
0 = approx 20k
1 = approx 1k
Table 42 Disabled Output Control
OUTPUT DISCHARGE CONTROL
The line outputs and speaker outputs can be actively discharged to GND through internal resistors if
desired. This is desirable at start-up in order to achieve a known output stage condition prior to
enabling the soft-start VMID reference voltage. This is also desirable in shut-down to prevent the
external connections from being affected by the internal circuits.
The individual control bits for discharging each audio output are described in Table 43.



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