Ampro Corporation COM 830 manual Gigabit Ethernet Description, Comment

Chapter 3 Signals and Pinout Tables

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

Description

I/O

PU/PD

Comment

GBE0_MDI[0:3]+

Gigabit Ethernet Controller 0: Media

I/O

Twisted

GBE0_MDI[0:3]-

Dependent Interface Differential Pairs 0, 1,

Analog

pair signals

2, 3. The MDI can operate in 1000, 100, and

for external

10Mbit/sec modes. Some pairs are unused

transformer.

in some modes according to the following:

1000

100

10

MDI[0]+/-

B1_DA+/-

TX+/-

TX+/-

MDI[1]+/-

B1_DB+/-

RX+/-

RX+/-

MDI[2]+/-

B1_DC+/-

MDI[3]+/-

B1_DD+/-

GBE0_ACT#

Gigabit Ethernet Controller 0 activity

OD

indicator, active low.

GBE0_LINK#

Gigabit Ethernet Controller 0 link indicator,

OD

active low.

GBE0_LINK100#

Gigabit Ethernet Controller 0 100Mbit/sec

OD

link indicator, active low.

GBE0_LINK1000#

Gigabit Ethernet Controller 0 1000Mbit/sec

OD

link indicator, active low.

GBE0_CTREF

Reference voltage for Carrier Board

REF

Reference

Ethernet channel 0 magnetics center tap.

voltage on

The reference voltage is determined by the

COM 830

requirements of the module PHY and may

is 1.8V

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.

Table 3-4. Serial ATA Signal Descriptions

Signal

Description

I/O

PU/PD

Comment

SATA0_RX+

Serial ATA channel 0, Receive Input

I SATA

Supports Serial ATA

SATA0_RX-

differential pair.

specification,

Revision 1.0a

SATA0_TX+

Serial ATA channel 0, Transmit

O SATA

Supports Serial ATA

SATA0_TX-

Output differential pair.

specification,

Revision 1.0a

SATA1_RX+

Serial ATA channel 1, Receive Input

I SATA

Supports Serial ATA

SATA1_RX-

differential pair.

specification,

Revision 1.0a

SATA1_TX+

Serial ATA channel 1, Transmit

O SATA

Supports Serial ATA

SATA1_TX-

Output differential pair.

specification,

Revision 1.0a

COM 830 Reference Manual 27