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WM8753LEB/V 데이터시트(PDF) 42 Page - Wolfson Microelectronics plc

부품명 WM8753LEB/V
상세설명  HI FI AND TELEPHONY DUAL CODEC
PDF  87 Pages
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제조업체  WOLFSON [Wolfson Microelectronics plc]
홈페이지  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8753LEB/V 데이터시트(HTML) 42 Page - Wolfson Microelectronics plc

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Advanced Information
WM8753L
w
AI Rev 3.1 June 2004
42
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
8
LD2MO
0
Left DAC to Mono Mixer
0 = Disable (Mute)
1 = Enable Path
7
MM2MO
0
MM Signal to Mono Mixer
0 = Disable (Mute)
1 = Enable Path
R38 (26h)
Mono Mixer
Control (1)
[6:4]
MM2MOVOL
[2:0]
101
(-9dB)
MM Signal to Mono Mixer Volume
000 = +6dB
… (3dB steps)
111 = -15dB
8
RD2MO
0
Right DAC to Mono Mixer
0 = Disable (Mute)
1 = Enable Path
7
ST2MO
0
Sidetone Signal to Mono Mixer
0 = Disable (Mute)
1 = Enable Path
[6:4]
ST2MOVOL
[2:0]
101
(-9dB)
Sidetone
Signal
to
Mono
Mixer
Volume
000 = +6dB
… (3dB steps)
111 = -15dB
3
VXD2MO
0
Voice DAC to Mono Mixer
0 = Disable (Mute)
1 = Enable Path
R39 (27h)
Mono Mixer
Control (2)
[2:0]
VXD2MOVOL
[2:0]
101
(-6dB)
Voice Signal to Mono Mixer Volume
000 = +9dB
… (3dB steps)
111 = -12dB
Table 34 Mono Output Mixer Control
ANALOGUE OUTPUTS
LOUT1/ROUT1 OUTPUTS
The LOUT1 and ROUT1 pins can drive a 16
Ω or 32Ω headphone or a line output (see Headphone
Output and Line Output sections, respectively). The signal volume on LOUT1 and ROUT1 can be
independently adjusted under software control by writing to LOUT1VOL and ROUT1VOL,
respectively. Note that gains over 0dB may cause clipping if the signal is large. Any gain setting
below 0101111 (-73dB) mutes the output driver. The corresponding output pin remains at the same
DC level (the reference voltage on the VREF pin), so that no click noise is produced when muting or
un-muting.
A zero cross detect on the analogue output may also be enabled when changing the gain setting to
minimize audible clicks and zipper noise as the gain updates. If zero cross is enabled a timeout is
also available to update the gain if a zero cross does not occur. This function may be enabled by
setting TOEN in register R18 (12h).



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