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

Page 33
Image 33
Ampro Corporation COM 830 manual Gigabit Ethernet Description, Comment