46 www.xilinx.com ML310 User Guide
1-800-255-7778 UG068 (v1.01) August 25, 2004
Chapter 2: ML310 Embedded Development Platform
R
send byte/receive byte/ write byte/write word/read word/block read/block write
command with clock synchronization function as well as 10-bit addressing ability. Please
see Section “IIC/SMBus Interface” for more information regarding the devices that are
connected to the SMBus. Please review the ALi M1535D+ Data sheets for more detailed
information.
AC97 Audio
The ALi South Bridge has a built-in Audio that is combined with a standard AC97 CODEC,
LM4550. Below is a list of the features available to the user. The ALi M1535D+ is used in
conjunction with an LM4550. Please review the ALi M1535D+ and LM4550 Data sheets,
located on the ML310 CDROM, for more detailed information.
♦ AC97 CODEC 2.1 Specification Compliant
♦ CODEC Variable Sample Rate Support
♦ 32-voice Hardware Wave-table Synthesis
♦ 32 Independent DMA _channels
♦ 3D Positioning Sound Acceleration
♦ Legacy Sound Blaster compatible
♦ FM OPL3 emulation
♦ MIDI Interpretation
♦ MIDI MPU-401 interface
The ML310 employs a National Semiconductor, LM4550, Audio CODEC combined with
the ALi South Bridge AC97 interface. This interface can be used to play and record audio.
The LM4550 has a left and right channel Line inputs, a microphone input, left and right
channel line outputs and an amplified version headphone output suitable for driving an 8
ohm load via LM4880 (U2). The audio jacks are available on the J1 and J2 connector
assemblies. Please consult the M1535D+, LM4550 and LM4880 data sheets in conjunction
with the ML310 schematics for more details on the ML310 Audio interface.
Table 2-19 describes the audio jacks available to the user on the ML310.
Table 2-19: Audio Jacks, J1 and J2
Audio Jack Signal name Description
J1 top AC _AMP_OUTR
AC _AMP_OUTL
AC Amplified Output,
driven by U2, LM4880
J1 Bottom AC_MIC_IN Microphone Input to U1, LM4550
J2 Top AC _LINE_OUTR
AC _LINE_OUTL
AC Line Output, Left and Right channels,
driven by U1, LM4550
J2 Bottom AC _LINE_INR
AC_LINE_INL
AC Line Input, Left and Right channels,
driven by U1, LM4550