Intel ESM-2740 User Manual page 32

ESM-2740/2743
2.4.3.2 Audio Signals
Signal
SNDL/ SNDR
AUXAL/ AUXAR
MIC
ASGND
ASVCC
2.4.3.3 USB Signals
Signal
USB [0:3]
USB [0:3]-
32 ESM-2740/2743 User's Manual
Line-level stereo output left/ right. These outputs have a nominal level of 1 volt
RMS into a 10K impedance load. These outputs cannot drive low-impedance
speakers directly.
Auxiliary A input left/ right. Normally intended for connection to an internal or
external CDROM analog output or a similar line-level audio source. Minimum input
impedance is 5KOhm.
Nominal input level is 1 volt RMS.
Microphone input. Minimum input impedance is 5KOhm, max. Input voltage is 0.15
Vp-p.
Analog ground for sound controller. Use this signal ground for an external amplifier
in order to achieve lowest audio noise levels.
Analog supply voltage for sound controller. This is an output which is used for
production test only. Do not make external connections to this pin.
Universal Serial Bus Port [0:3] positive signal.
These are the serial data pairs for USB Port N-and Port N#.
Universal Serial Bus Port [0:3] negative signal.
These are the serial data pairs for USB Port N-and Port N#.
Signal Description
Signal Description