Advanced Information
WM8753L
REGISTER
ADDRESS
BIT
8:7
LABEL
DEFAULT
DESCRIPTION
R2 (02h)
Additional
Control (1)
DATSEL
[1:0]
00
00: left data = left ADC; right data = right ADC
01: left data = left ADC; right data = left ADC
10: left data = right ADC; right data = right ADC
11: left data = right ADC; right data = left ADC
Table 8 ADC Data Output Configuration
MICROPHONE INPUTS
MIC1N
MIC1
amp1out
micamp1
MICAMP1EN
vmid
vmid
MIC2N/
MIC3
micamp2
amp2out
MIC2
MICAMP2EN
vmid
vmid
Figure 6 Internal Microphone Input Circuit
There are two microphone pre-amplifiers which can be configured in a variety of ways to
accommodate up to 3 single ended or 2 differential microphone inputs. The microphone input circuit
is shown in Figure 6.
Each microphone preamplifier has a separate enable bit, MICAMP1EN and MICAMP2EN. The gain
for each preamp can be set independently using MIC1BOOST and MIC2BOOST.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R21 (15h)
MICAMP1EN
0
Microphone amplifier 1 enable
0 = Mic1 amp disabled
8
1 = Mic1 amp enabled
MICAMP2EN
0
Microphone amplifier 2 enable
0 = Mic2 amp disabled
7
1 = Mic2 amp enabled
Table 9 Mic Preamp Enables
AI Rev 3.1 June 2004
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
