CME-Atom User Manual 1.2
www.diamondsystems.com
Page 18
4.1.1
USB signals
These pins provide connections to the board‟s eight USB channels. For further information regarding the functions
of the USB signals listed above, refer to the USB 2.0 Specification, available from the USB Implementers Forum
(
http://www.usb.org
).
Signal Name
Signal Function
Direction
USB[0:7]+
USB[0:7]-
USB differential pairs, data channels 0 through 7.
I/O
USB_0_1_OC#
USB over-current sense, USB channels 0 and 1.
I
USB_2_3_OC#
USB over-current sense, USB channels 2 and 3.
I
USB_4_5_OC#
USB over-current sense, USB channels 4 and 5.
I
USB_6_7_OC#
USB over-current sense, USB channels 6 and 7.
I
4.1.2
Gigabit Ethernet (LAN)
These pins provide connections to the GigE (LAN) interface.
Signal Name
Signal Function
Direction
GBE0_MDI[0:3]+
GBE0_MDI[0:3]-
Gigabit Ethernet Controller 0: Media Dependent Interface
Differential Pairs 0,1,2,3.
I/O
GBE0_ACT#
Gigabit Ethernet Controller 0 activity indicator.
OD
GBE0_LINK#
Gigabit Ethernet Controller 0 link indicator.
OD
GBE0_LINK100#
Gigabit Ethernet Controller 0 100 Mbit / sec link indicator.
OD
GBE0_LINK1000# Gigabit Ethernet Controller 0 1000 Mbit / sec link indicator.
OD
GBE0_CTREF
Reference voltage for carrier board Ethernet channel 0
magnetics center tap.
REF
4.1.3
AC97 Audio/High Definition Audio
These pins provide connections to the high definition audio interface.
Signal Name
Signal Function
Direction
AC_RST#
Reset output to AC97 CODEC.
O
AC_SYNC
48kHz fixed-rate, sample-synchronization signal to the
CODEC(s).
O
AC_BITCLK
12.228 MHz serial data clock generated by the external
CODEC(s).
I/O
AC_SDOUT
Serial TDM data output to the CODEC.
O
AC_SDIN[0:2]
Serial TDM data inputs from up to 3 CODECs/
I