Table 3-3. Gigabit Ethernet Signal Descriptions; Table 3-4. Serial Ata Signal Descriptions - Ampro COM 830 Reference Manual

Chapter 3
AC_SYNC and AC_SDOUT can be used to switch PCI Express channels 1-4 between x1 and x4 mode. If
both signals are each pulled-up (using 1k resistors) to 3.3V at the rising edge of PWROK then x4 mode is
enabled. x1 mode is used by default if these resistors are not populated.

Table 3-3. Gigabit Ethernet Signal Descriptions

Gigabit Ethernet
GBE0_MDI[0:3]+
GBE0_MDI[0:3]-
GBE0_ACT#
GBE0_LINK#
GBE0_LINK100#
GBE0_LINK1000#
GBE0_CTREF

Table 3-4. Serial ATA Signal Descriptions

Signal
SATA0_RX+
SATA0_RX-
SATA0_TX+
SATA0_TX-
SATA1_RX+
SATA1_RX-
SATA1_TX+
SATA1_TX-
COM 830
Description
Gigabit Ethernet Controller 0: Media
Dependent Interface Differential Pairs 0, 1,
2, 3. The MDI can operate in 1000, 100, and
10Mbit/sec modes. Some pairs are unused
in some modes according to the following:
1000
MDI[0]+/- B1_DA+/-
MDI[1]+/- B1_DB+/-
MDI[2]+/- B1_DC+/-
MDI[3]+/- B1_DD+/-
Gigabit Ethernet Controller 0 activity
indicator, active low.
Gigabit Ethernet Controller 0 link indicator,
active low.
Gigabit Ethernet Controller 0 100Mbit/sec
link indicator, active low.
Gigabit Ethernet Controller 0 1000Mbit/sec
link indicator, active low.
Reference voltage for Carrier Board
Ethernet channel 0 magnetics center tap.
The reference voltage is determined by the
requirements of the module PHY and may
be as low as 0V and as high as 3.3V.
The reference voltage output shall be
current limited on the module. In the case in
which the reference is shorted to ground,
the current shall be limited to 250mA or
less.
Description
Serial ATA channel 0, Receive Input
differential pair.
Serial ATA channel 0, Transmit
Output differential pair.
Serial ATA channel 1, Receive Input
differential pair.
Serial ATA channel 1, Transmit
Output differential pair.
Reference Manual
I/O
I/O
Analog
100 10
TX+/- TX+/-
RX+/- RX+/-
OD
OD
OD
OD
REF
I/O PU/PD
I SATA
O SATA
I SATA
O SATA
Signals and Pinout Tables
PU/PD Comment
Twisted
pair signals
for external
transformer.
Reference
voltage on
COM 830
is 1.8V
Comment
Supports Serial ATA
specification,
Revision 1.0a
Supports Serial ATA
specification,
Revision 1.0a
Supports Serial ATA
specification,
Revision 1.0a
Supports Serial ATA
specification,
Revision 1.0a
27