Audio; Ess Solo 1; Real Time Clock - Mitsubishi Electric PH440 User Manual

Pentium ii processor-based nlx profile motherboard
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P H 4 4 0 N L X M o t h e r b o a r d U s e r G u i d e

AUDIO

The audio subsystem is based around an ESS Solo1 CODEC. The audio subsystem can be
completely depopulated to leave the standard PC beep function.

ESS Solo 1

PCI bus interface
Internal FM synthesiser
Dual DMA support with FIFO & full duplex operation
Programmable power management
Joystick and MPU-401 compatible MIDI interfaces
5 channel input mixer
One power amplifier is used - a National Semiconductor LM4880 'Boomer' to drive the LINE-
out jack socket and the optional internal speaker (via the NLX riser). The microphone input
provides power to enable condenser microphones to be used.
Channel
CODEC LINE
CODEC AUXA
CODEC AUXB
CODEC MIC
CODEC Mono In
The following audio connectors are supported.
Rear 3.5mm jack microphone input with phantom power
Rear 3.5mm jack LINE in
Rear 3.5mm jack LINE out
Internal CD-ROM stereo audio on 4-pin ATAPI connector
AMC connector stereo audio
Modem audio via NLX riser auxiliary edge connections

REAL TIME CLOCK

The real time clock is located in the PIIX4e and includes 256 bytes of battery backed RAM with
two lockable ranges. The clock includes a date alarm and operates from a 32.768kHz crystal. The
3V lithium cell provides data retention for up to 5 years of normal use. Note that the battery is
used only when AC power is not applied to the system (or a standby 5V rail is not provided).
MITSUBISHI ELECTRIC MOTHERBOARD DIVISION
Rear line input jack socket
CD input (from riser) or from motherboard connector
VGA AMC Connector
Rear microphone jack socket or Riser connection
Modem in audio from Riser
S e p t e m b e r 1 9 9 8
PAGE 23 OF 51

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