Texas Instruments XIO2200 Manual de usuario

SCPU024

Texas Instruments

XIO2200 EVM Guide

SCPU024

Table of Contents

1 Overview................................................................................................................................................................3

2 EVM Features........................................................................................................................................................3

2.1 PCI Express Connector...................................................................................................................................3

2.2 1394a Connectors .............................................................................................................................................4

2.3 EEPROM interface..........................................................................................................................................4

2.4 External Power Connector ..............................................................................................................................4

2.5 LEDs................................................................................................................................................................5

3 Questions/Troubleshooting.................................................................................................................................5

3.1 BIOS fails to assign a memory window to the bridge......................................................................................5

3.2 Controller is Banged out in Windows Device Manager...................................................................................5

3.3 System does not boot when turned on with a peripheral attached to the XIO2200 EVM...............................6

3.4 What to do if EVM is not working ....................................................................................................................6

3.4.1 Check EVM Power...................................................................................................................................6

3.4.2 Check if Bridge is link training..................................................................................................................6

3.4.3 Check if XIO2200 has been configured...................................................................................................6

4 EVM Schematics...................................................................................................................................................8

5 EVM Bill of Materials ..........................................................................................................................................10

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1 Overview

The XIO2200 Evaluation Board (EVM) is a functional implementation of a PCI Express to Two-

Port 1394a OHCI controller using the Texas Instruments XIO2200 PCI Express to PCI Bus

Translation Bridge with 1394a OHCI and Two-Port PHY. Designed as a x1 add-in card, it is

routed on FR4 as a standard 4-layer (2 signal, 1 power, 1 ground) board with a 100-Ω

differential impedance (for PCI-Express pairs), 110-Ωdifferential impedance (for 1394a pairs),

and 50-Ωsingle-ended impedance using routing guidelines and requirements specified in the

PCI Express Card Electromechanical Specification rev 1.0a, PCI Local Bus Specification rev

2.3, and IEEE 1394-1995 Specification. All board power for the XIO2200 EVM and any bus

power provided to the 1394 connectors are provided or derived from the standard voltages

provided on the PCI-Express connector. However due to the limited availability of 12-V

current (for 1394 bus power) an option has been provided to power 12-V rail from an external

4-pin floppy drive connector if testing bus-powered 1394a devices which require more than the

500 mA that can be drawn (by specification) from the PCI Express x1 Connector.

Upon request gerber files for the EVM may be provided to illustrate techniques used to

achieve fan out (of the u*BGA), use of split power planes, placement of filters and other critical

components, and methods used to achieve length matching on PCI and PCI Express signals

on a standard 4-layer board.

Schematics and a Bill of Materials are provided below to illustrate the design of this particular

EVM.

2 EVM Features

2.1 PCI Express Connector

The EVM is designed as a PCI Express add-in card. The card will fit into any standard x1, x2,

x4, x8, or x16 add-in connector that is compliant to the PCI Express Card Electromechanical

Specification revision 1.0a. In addition to the standard transmit and receive pairs the

connector must supply 3.3 V, 12 V, PERST#, a 100-MHz differential clock, and Vaux. The

WAKE# signal is also supported by the EVM although as an optional pin the system is not

required to support this signal.

The card may be placed within a case that permits insertion of standard PCI Express Add-In

cards; however the lack of a mounting bracket may lead to instability when 1394a cables are

plugged/unplugged from the card.

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2.2 1394a Connectors

The XIO2200 EVM provides 2 standard 1394a connectors. 12 V is provided to the connectors

so that bus powered peripherals may be used although fuses limit the amount of current that

may be drawn to 1 A per each port. Also see section 2.4 on the external power connector for

further information of power limitations.

2.3 EEPROM interface

Each XIO2200 EVM provides an on board EEPROM. As shipped each EEPROM is

programmed with values that will allow the EVM to function in most systems. The EEPROM

interface is left as programmable (not write protected) so that EEPROM contents may be

modified for testing other optional settings. Unless required it is recommended that the values

contained in the EEPROM remain unchanged. If a change is desired in EEPROM contents,

values may be changed using EEPROM access registers as detailed in the XIO2200 data

manual or upon request TI may provide an EEPROM access tool.

2.4 External Power Connector

As previously mentioned the PCI Express Card Electromechanical Specification revision 1.0a

limits the amount of current an x1 card can draw from the 12-V rail to 500 mA. Since the 12-V

rail on the EVM is used solely for providing bus power to attached 1394 devices it is possible

that 2 attached devices may exceed this requirement. If testing is desired with devices that

exceed this limit the board may be altered to provide power through a standard 4-pin floppy

connector which will be able to provide a much higher amount of current from the 12-V rail.

The modifications are as follows:

Remove D7 and populate D4 with the removed part being careful that the part is properly

oriented. The notched edge (cathode) should be oriented away from J3 (notched part on left)

if in D4, if in D7 the notched edge should be placed up (away from P1).

Populate J3 with a 4 pin header. The part used for design was an AMP 171826-4.

Note: if these modifications are made the PCI Express Connector will no longer provide power

to the 1394 connectors. If power is then not provided from the floppy connector, bus powered

1394 devices will no longer function. If desired, it is possible to place another diode

(MBRS340T3) in D4 without removing D7 then power could be provided safely from either

source as the Diodes would isolate the 2 power sources preventing any conflict.

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2.5 LEDs

The XIO2200 EVM has LEDs on board to indicate availability of power and status of certain

control signals. The onboard LEDs are as follows

D1 – 1.5V (note: this LED will generally not light due to absence of LED with Vf <= 1.5V)

D2 – 12V power indicator

D3 – 3.3V power indicator

D4 – PCI Express WAKE# indicator (power on, WAKE# asserted)

D5 – PCI Express PERST# indicator (power on, reset asserted)

3 FAQ/Troubleshooting

Use of the EVM is fairly straightforward, place the EVM into a PCI express add-in slot and turn

the system on. At any time 1394a peripherals may be attached to the EVM. From the

operating system perspective the XI22000 appears to be a standard PCI to PCI Bridge (PCI

header type 1) with a 1394a OHCI controller behind it, and the OS will be able to configure the

XIO2200 accordingly using legacy PCI configuration transactions. Below are some issues that

may impair use of the bridge in a system.

3.1 BIOS fail to assign a memory window to the bridge.

Microsoft operating systems generally attempt to respect the resource allocations

made by system BIOS. The XIO2200 requires a memory window in order to access

some registers used by the device. If Microsoft determines that the BIOS failed to

assign a memory window to the XIO2200 it will assume that one can not be

assigned and that the device is non-functional. In this situation the OS will not

enumerate devices behind the bus and they will never be configured or assigned

resources. This failure can be determined by examining device manager, if this has

occurred the bridge will appear “banged out” and if the bridge properties are

examined the OS will explain that insufficient resources were available to configure

the device. The only solution for this issue is to use the EVM in a system which

assigns appropriate resources.

3.2 1394 Controller is banged out in Windows Device Manager. .

In Windows device manager the XIO2200 will appear as a Texas Instruments OHCI

Controller. Since 1394 requires that all devices have a GUID (Global Unique

Identification) number for routing purposes, if the OS reads that the appropriate

The XIO2200 EVM programs the GUID of the controller from the onboard EEPROM,

so a bang next to the device will most likely indicate that the EEPROM was not

SCPU024

properly programmed. However if this is the case the EVM will still function despite

the indication of a problem in Windows device manager.

3.3 Windows takes a long time to boot when peripherals are attached.

Occasionally when the system is booted with a peripheral attached, it will take a

long time for the OS to load and when it does come up the peripheral will not be

present. Detaching and re-attaching the cable will result in the peripheral appearing.

This is a known issue with Windows enumeration of all 1394 controllers. It appears

infrequently but can be avoided by not booting with 1394 peripherals attached or by

waiting then unplugging and re-plugging the peripherals.

3.4 What to do if EVM is not working

3.4.1 Check 1.5-V Power.

The XIO2200 requires 1.5 V for proper operation. As this voltage is not provided

from the PCI Express connector it is regulated from 3.3 V from the connector.

1.5 V may be probed at pin 4 of the regulator (U3), at the anode of D1, or one

end of C44.

3.4.2 Check if Bridge is link training

If the system does not boot, detach all 1394 peripherals from EVM and try again.

If system is hanging before OS loads then it is likely that the system and the

EVM are having difficulty completing link training which is most likely an issue

with signal integrity on the differential pairs. If a PCI Express analyzer is

unavailable then try a different express slot or a different system if possible. Re-

check the 1.5-V rail and examine the differential clock on an oscilloscope to

ensure it is clean.

If link training successfully completes the system will boot and the XIO2200 will

appear in the device manager. If the bridge does not appear in the device

manager then the system may not have detected the presence of the bridge,

again perform the previous checks.

Also, if PCI add-in cards have enough weight and there is no mechanical

support, the EVM may flex and some components may crack or become

disconnected. Check the coupling caps on the EVM transmit lines (C51 and

C52), these .1-µF 0402 components have a tendency to crack if enough stress is

put on the board; they will need to be replaced if they are damaged.

3.4.3 Check if the XIO2200 has been configured

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Once the bridge is communicating with the system, BIOS and/or the OS are

expected to configure the bridge in order for proper operation. As the XIO2200

appears to software to be a standard PCI to PCI Bridge with a PCI based 1394

controller behind it, most existing BIOS and OS should be capable of configuring

the bridge and controller with no special considerations for PCI Express. PCI

Bridge registers to be configured. Setup for the 1394 device is also standard

and should be configured by standard drivers.

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4 EVM Schematics

D D

C C

B B

A A

Pull Ups/Pull Downs

Bridge Power

Filtering/Decoupling

NOTE: C40 should go

directly under the

pin H14 on U1

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12Tuesday,July 26,2005

Title

Size D ocum entNumber Rev

Date: Sheet of

RXp

RXn

TXn

COMB_IO _33

C O M B _33

C O M B _15

TXp

CNA

GPIO4

GPIO5

GPIO0

GPIO1

GPIO7

GPIO2

GPIO3

GPIO6

VCCA_1.5V

VCCA_3.3V

V C C A_3.3VV C C A_1.5V

GRST#

GPIO4

GPIO5

GPIO0

GPIO3

GPIO2

GPIO1 GPIO4

GPIO6

GPIO7

1394_TPBIAS0

1394_TPBIAS1

1394_TPB1p

1394_TPB1n

1394_TPA1p

1394_TPA1n

1394_TPB0p

1394_TPB0n

1394_TPA0p

1394_TPA0n

W AKE#

RXn

TXp

TXn

RXp

Clk-

Clk+

PERST#

D V cc_3.3V

D V C C _1.5V

D V cc_3.3V

D V C C _3.3V

D V cc_1.5V

D V cc_3.3V

DVCC_1.5VDVCC_3.3V V aux

DVCC_3.3V

Vaux

DVCC_3.3V

D V cc_3.3V

Vaux

D V C C _12V

Vaux

C28

.1uF

RESERVED

1394

Power

1.5V3.3V 1.5V 3.3V

Vaux

GROUND

Digital Analog

GPIO EXPRESS

XIO2200

Misc

Digital Analog

U1 Galadriel

H16

H17

E16

E17

C17

C16

C10

B11

B12

B13

A10

C11

C12

A14

B10

A11

A12

A13

B14

T12

U12

U15

T15

U11

T11

U14

T14

U13

U16

T10

T17

R16

D16

C13

D10

J15

H14

P10

P11

T13

R14

G15

K14

R10

R11

R12

R13

P15

K17

C14

D11

L15

H15

F15

F16

G14

R17

N16

U10

N15

L16

L17

M16

A16

J17

N17

B15

A15

D15

P17

P16

M15

J14

K15

M17

K16

L14

G16

G17

F17

J16

E15

B17

D17

TXn

TXp

RXn

RXp

CLK+

CLK-

RSVD

TPA0p

TPA0n

TPA1n

TPA1p

TPB0n

TPB0p

TPB1n

TPB1p

TPBIAS0

TPBIAS1

CNA

CPS

V D D _15

RSVD

V D D _15

V D D _33

VDDA_15

V D D _15

VDDA_33

V D D _33

VDDA_15

V D D _33_AU X

VSSA

VDDA_15

VSS

VSSA

RSVD

VSSA

RSVD

GPIO0

GPIO1

GPIO2

GPIO3

GPIO4

GPIO5

GPIO6

GPIO7

RSVD

PC0

PC1

PC2

RSVD

REF0

REF1

W AKE#

R E FC LK _SE L

PERST#

GRST#

RSVD

VDDA_33

RSVD

VDDA_15

VDDA_33

V D D _15_C O M B

V D D _33_C O M B

V D D _33_C O M BIO

VSSA

VSS

VDDA_15

VSSA

RSVD

C29

.1uF

C26

.1uF

C31

.1uF

C41

.1uF

.01uF

C27

.1uF

C30

.1uF

1000pF

C32

.1uF

C12

.1uF

8.2 nH 0.12ohm 0805

1 2

C38

.1uF

C39

.1uF

C37

.1uF

C13

.1uF

C18

1000pF

C21

.1uF

C20

.1uF

24.576M H z

C22

.1uF

C10

.1uF C11

1000pF

C19

.1uF

C34

.1uF

C23

.1uF

1000pF

C17

.1uF

R 8 14.3K

1uF

R 9 232

8.2 nH 0.12ohm 0805

1 2

1uF

C33

.1uF

R 4 43K

CTS 10Kx8 BusRes-746 series

R4 R5

COM1

COM2

C24

.1uF

1uF

.01uF

10K

C 36 12pF

C 35 12pF

10K

R 5 390K

10K

1000pF

24LC 08B -I/ST

4 5

VSS SDA

SCL

VCC

C40

1000pF

C42

.1uF

C15

.1uF

C16

.1uF

.01uF

C14

.1uF

C25

.1uF

R6 6.34K

D D

C C

B B

A A

LEDs

Power

PCI Express1394

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22Tuesday,July 26,2005

Title

Size D ocum entNumber Rev

Date: Sheet of

PRESENT# TXpCTXp

CTXn

RXp

RXn

PERST#

TXn

JTAG_LOOP

PRESENT#

PCI_12V

Floppy_12V

RXp

Clk+

TXn

RXn

TXp

Clk-

PERST#

W AKE#

1394_TPA0p

1394_TPB0n

1394_TPA1n

1394_TPBIAS0

1394_TPB0p

1394_TPB1n

1394_TPBIAS1

1394_TPA0n

1394_TPB1p

1394_TPA1p

Vaux

DVCC_1.5V

DVCC_3.3V

D V C C _12v

DVCC_3.3VDVCC_1.5V

DVCC_3.3V

D V C C _12V

Vaux DVCC_3.3V

D V C C _12V

D V C C _12v

D V C C _12V

C53

270pF

C47

1uF

R23

C54

270pF

M B R S340T3

2 1

LE D R ed 0805

1 2

C52 .1uF

C51 .1uF

LE D R ed 0805

1 2

C43

10uF

R22 1K

R18

56.2

C44

10uF

R19

56.2

C55

1000pF

R13

56.2

R14

56.2

R 26 330

C57

1000pF

R16

56.2

FB1

1000 @ 10M H Z

1 2

R 24 330

R17

56.2

R11

56.2

R12

56.2

R 25 330

R21

5.1K

R20

5.1K

M BR S 340T3

2 1

5V GND GND 12V

F1 S M D 100

LED Yellow 0805

1 2

F2 S M D 100

J1 1394_SO C KET

CHASSIS_GND

BUSPOW ER

TPA+

TPA-

TPB+

TPB-

GND

CHASSIS_GND1

J2 1394_SO C KET

CHASSIS_GND

BUSPOW ER

TPA+

TPA-

TPB+

TPB-

GND

CHASSIS_GND1

LED Green 0805

1 2

Side B

Component Side Side A

Solder

Side

Key

PCIExpress x1 Card Edge

B10

B11

B12

B13

B14

B15

B16

B17

B18

A10

A11

A12

A13

A14

A15

A16

A17

A18

12V

RSVD

GND

SMCLK

SMDAT

GND

3.3V

J_T R S T #

3.3 V aux

W AKE#

RSVD

GND

RXp0

RXn0

GND

PRSNT2#

GND

PRSNT1#

12V

GND

J_T C K

J_T D I

J_T D O

J_T M S

3.3V

PW RGD

GND

REFCLK+

REFCLK-

GND

TXp0

TXn0

RSVD

C50

100uF

R 15 49.9

LE D R ed 0805

1 2

FB2

1000 @ 10M H Z

1 2

R 10 10K

C56

.01uF

C49

100uF

C58

.01uF

C48

270pF

C45

1uF

C46

270pF

TP S 72615D C Q

ENABLE

GND

OUT

RESET

GND

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