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WM8972LEFL/R 数据表(PDF) 24 Page - Wolfson Microelectronics plc

部件名 WM8972LEFL/R
功能描述  MONO CODEC FOR PORTABLE AUDIO APPLICATIONS
PDF  49 Pages
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制造商  WOLFSON [Wolfson Microelectronics plc]
网页  http://www.wolfsonmicro.com
标志 WOLFSON - Wolfson Microelectronics plc

WM8972LEFL/R 数据表(HTML) 24 Page - Wolfson Microelectronics plc

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WM8972L
Preliminary Technical Data
w
PTD Rev 2.2 June 2004
24
OUTPUT MIXERS
The WM8972L provides the option to mix the DAC output signal with analogue line-in signals from
the INPUT1+/- or INPUT2+/- pins or a mono differential input (INPUT1+ – INPUT1-) or (INPUT2+ –
INPUT2-), selected by DS (see Table 3). The level of the mixed-in signals can be controlled with
PGA (Programmable Gain Amplifier).
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R34 (22h)
Plus Mixer (1)
2:0
+MIXSEL
000
Plus Input Selection for Output Mix
000 = INPUT1+
001 = INPUT2+
011 = ADC Input (after PGA /
MICBOOST)
100 = Differential input
R36 (24h)
Minus Mixer
(1)
2:0
-MIXSEL
000
Minus Input Selection for Output Mix
000 = INPUT1-
001 = INPUT2-
011 = RESERVED (Do not use)
100 = Differential input
Table 14 Output Mixer Signal Selection
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
8
D2+MO
0
DAC to Plus Mixer
0 = Disable (Mute)
1 = Enable Path
7
+M2+MO
0
+MIXSEL Signal to Plus Mixer
0 = Disable (Mute)
1 = Enable Path
R34 (22h)
Plus Mixer
Control (1)
6:4
+M2+MOVOL
[2:0]
101
(-9dB)
+MIXSEL Signal to Plus Mixer Volume
000 = +6dB
… (3dB steps)
111 = -15dB
7
-M2+MO
0
-MIXSEL Signal to Plus Mixer
0 = Disable (Mute)
1 = Enable Path
R35 (23h)
Plus Mixer
Control (2)
6:4
-M2+MOVOL
[2:0]
101
(-9dB)
-MIXSEL Signal to Plus Mixer Volume
000 = +6dB
… (3dB steps)
111 = -15dB
Table 15 Plus Output Mixer Control



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