ALC5642-VF
Datasheet
7.7. Analog Audio Input Port
The ALC5642 has two types analog input ports: microphone input and line input.
IN1P/N
The IN1P/N is a microphone type input port. The input port can be configured to differential input or
single-ended input by MX-0D[7]. The microphone input port has its microphone bias and microphone
boost. The low noise microphone bias can improve recording performance and enhance recording
quality. Build-in short current detection scheme can be used for switch detection. Multi-steps
microphone boost gain set by sel_bst1 (MX-0D[15:12]) is easy to use for microphone application.
Pow_bst1 can be used to power down the MIC1 boost and pow_micbias1 can be used to power down
the microphone bias 1.
IN2P/N
The IN2P/N is a dual type input port: microphone input and line input. Microphone input can be
configured to differential input or single-ended input by MX-0E[6]. Multi-steps microphone boost
gain set by sel_bst2 (MX-0E[11:8]) is easy to use for microphone application. Pow_bst2 can be used
to power down the MIC2 boost. As line input, it has volume control for tuning by MX-0F[12:8] and
MX-0F[4:0].
IN3P/N
The IN3P/N is a microphone type input port. Microphone input can be configured to differential input
or single-ended input by MX-0D[6]. Multi-steps microphone boost gain set by sel_bst3
(MX-0D[11:8]) is easy to use for microphone application. Pow_bst3 can be used to power down the
MIC3 boost. The port is pin share with MONOP and MONON. If as IN3P/N port needs power down
MONOP/N. And if as MONOP/N port needs power down IN3P/N.
Multi-Channel Audio Hub/CODEC with embedded Voice
DSP and SounzRealTM Digital Sound Effect
28
Rev. 0.93
REALTEK [ Realtek Semiconductor Corp. ]
