PCI & PCI-E

Sephiroth Kwon

GRMA

2009-05-26

PCI

Outline

• Diagram• Signal Description• Repair Flow Chart• Repair Technique

PCI

PCI Diagram

PCI BUS

PCI SLOT

South Bridge

ClockGen.

Clock Signal

PCI Diagram

ClockGen.

PCI 1

CC

RN

C

PCI 2 PCI 3

PCLK1

PCLK2

PCLK3

B76

B76

B76

Clock Circuit

Signal Description

PCICompliant

Device

AD[63:32]C/BE[7:4]#PAR64REQ63#ACK64#LOCK#INTA#INTB#INTC#INTD#SBO#SDONETDITDO

TRST#

TCKTMS

AD[31:0]C/BE[3:0]

PARFRAME#

IRDY#TRDY#STOP#

DEVSEL#IDSELPERR#SERR#REQ#GNT#CLK#RST#

Address & Data

InterfaceControl

System

Arbitration

Error Reporting

Voltage and Clock

• 1.Check Voltage ： 2.Check Clock ：Pin# Voltage

A2 +12V

A5 +5V

A8 +5V

A10 +5V(I/O)

A16 +5V(I/O)

A21 +3.3V

A27 +3.3V

A33 +3.3V

A39 +3.3V

A45 +3.3V

A53 +3.3V

A59 +5V(I/O)

A61 +5V

A62 +5V

Pin# Voltage

B1 -12V

B5 +5V

B6 +5V

B19 +5V(I/O)

B25 +3.3V

B31 +3.3V

B36 +3.3V

B41 +3.3V

B43 +3.3V

B54 +3.3V

B59 +5V(I/O)

B61 +5V

B62 +5V

Pin# Frequency

B16 33MHz

A mean “Left”, B mean “Right”

AD Signal

Pin Name Pin# Diode Mode Sample

AD[00] A58 .317

AD[01] B58 .319

AD[02] A57 .321

AD[03] B56 .318

AD[04] A55 .319

AD[05] B55 .321

AD[06] A54 .319

AD[07] B53 .317

AD[08] B52 .319

AD[09] A49 .321

AD[10] B48 .317

AD[11] A47 .319

AD[12] B47 .321

AD[13] A46 .323

AD[14] B45 .318

AD[15] A44 .317

Pin Name Pin# Diode Mode Sample

AD[16] A32 .317

AD[17] B32 .319

AD[18] A31 .321

AD[19] B30 .318

AD[20] A29 .319

AD[21] B29 .322

AD[22] A28 .319

AD[23] B27 .318

AD[24] A25 .317

AD[25] B24 .319

AD[26] A23 .321

AD[27] B23 .323

AD[28] A22 .319

AD[29] B21 .321

AD[30] A20 .319

AD[31] B20 .318

Control Signal

• 1.Check Control Signal ：

Pin Name Pin#

FRAME# A34

IRDY# B35

TRDY# A36

STOP# A38

DEVSEL# B37

IDSEL A26

A mean “Left”, B mean “Right”

(1)System Pins

• CLK– All other PCI signals, except RST#, INTA#, INTB#, INTC#, and

INTD#, are sampled on the rising edge of CLK and all other timing parameters are defined with respect to this edge.

• RST#– Anytime RST# is asserted, all PCI output signals must be driven

to their initial state. RST# may be asynchronous to CLK when asserted or deasserted.

(2) Address and Data Pins

• AD[31::00]– A bus transaction consists of an address phase followed by one

or more data phases. PCI supports both read and write bursts.

• C/BE[3::0]#– During the address phase of a transaction, C/BE[3::0]# define

the bus command. During the data phase, C/BE[3::0]# are used as Byte Enables.

(3)Interface Control Pins

• FRAME# (Cycle Frame)– Driven by the current master to indicate the beginning and duration

of an access.• IRDY# (Initiator Ready)

– Indicates the initiating agent’s (bus master’s) ability to complete the current data phase of the transaction.

• TRDY# (Target Ready)– Indicates the target agent’s (selected device’s) ability to complete

the current data phase of the transaction.• DEVSEL# (Device Select)

– Indicates the driving device has decoded its address as the target of the current access.

• STOP#– Indicates the current target is requesting the master to stop the

current transaction.• IDSEL (Initialization Device Select)

– Chip select during configuration read and write transactions.

(4)Arbitration Pins

• REQ#– Indicates to the arbiter that this agent desires use of the bus.

This is a point-to-point signal. Every master has its own REQ#.• GNT#

– Indicates to the agent that access to the bus has been granted. This is a point-to-point signal. Every master has its own GNT#.

(5)Interrupt Pins

• Interrupts on PCI are optional and defined as “level sensitive”, “active low”, using open drain output drivers.

• INTA# :– Interrupt A is used to request an interrupt.

• INTB~D# :– Interrupt B~D are used to request an interrupt and only has

mean on a multi-function device.

Repair Flow ChartSTART

Visual Inspectioncheck PCI pin is not bent or

damaged.

Measure PCI Voltage

Measure PCI AD signals

Measure PCI Clock

Measure PCI control signals

Remove NG Device under PCI /Change SB

Change any damaged PCI connector

Check PCI Voltage 12V.-12V.5V.3V.3VSB

Check PCI CLK33Mhz

Check AD0~31,compare with good MB

Check RST#,FRAME#,DEVSEL#,IRDY#.....

Fix any trace open or RLC damaged

Fix any trace open or RLC damaged

Fix any trace or RLC damaged, change NG

CLK Generator

Fix any trace open or RLC damaged

Finished

OK

OK

OK

OK

OK

OK

NG

NG

NG

NG

OK

OK

OK

OK

NG

NG

NG

NG

NG

Repair Technique-Visual Inspection

1

Visual Inspection to check the PCI connector is no pin bent or broken.

Repair Technique-Measure PCI Voltage

2

Use Multi-Meter to measure PCI related voltages (+12V, -12V,5V,3.3V)

Repair Technique-Measure PCI Clock

3-1

Use Oscilloscope to measure PCI Clock =33Mhz

3-2

Repair Technique- Measure PCI other signals

Use Multi-Meter to measure other PCI signals:

AD0~AD31(refer to P16)& control signals ( FRAME#, IRDY#, TRDY#.......(refer to P17)

Compare with good MB. If find error trace the connection to find any trace open or short. If cannot find the root cause please try to remove other component under PCI bus and change PCI controller-SB.

4

PCI-E

Outline

• Diagram• Signal Description• Repair Flow Chart• Repair Technique

PCI-E

PCI-E X16 Diagram-1

PCI-E *16 SLOT

NorthBridge

+3VB8,A9,A10

+3VSBB10

+12VB1,B2,B3,A2,A3

PCI-E X16 Diagram-2

ClockGen.

PCI-E *16

R

Clock+

Clock-

A13

Clock Circuit

A14

PCI-E X1 Diagram

+12V (A2,A3)

+3V (A9,A10)

Clock (A13,A14)

+12V (B1,B2,B3)

+3VSB (B10)

+3V (B8)

PCIE*1

North&

South Bridge

Repair Flow ChartSTART

Visual Inspectioncheck PCI-E pin is not bent or

damaged.

Measure PCI-E Voltage

Measure PCI-E TX /RX signals

Measure PCI-E Clock

Change NB(PCI-EX16) or SB(PCI-EX1)

Change any damaged in PCI-E connector

Check PCI Voltage 12V.3V.3VSB

Check PCI-E CLK100Mhz

Check TX /RX signals,compare with good MB

Fix any trace open or RLC damaged

Fix any trace or RLC damaged, change NG

CLK Generator

Fix any trace open or RLC damaged

Finished

OK

OK

OK

OK

OK

NG

NG

NG

OK

OK

OK

OK

NG

NG

NG

NG

Repair Technique-Visual Inspection

1-1

1-2

Visual Inspection to check PCI-E connector is not damaged or bent pin inside.

Repair Technique-Measure PCI-E Voltage

2-1

2-2

Use Multi-Meter to measure PCI-E working Voltages—12V, 3V, 3VSB.

P.S. We can use PCI-E X16 Signals Pin Out card to measure.

P/N: 08-900036900

Name: ENG_PCI-E PIN NAME R1.00

Repair Technique- Measure PCI-E Clock

3-1

3-2

Use Oscilloscope to measure PCI-E CLK =100Mhz

Repair Technique-Measure PCI-E TX/RX signals

4-1

4-2

Use Multi-Meter to measure PCI-E TX/RX signals, compare with good MB.

If find error please trace the circuit to check related trace & RLC components.

If still can’t find any abnormal please try to change NB (PCI-E X16 controller) or SB (PCI-E X1 controller).

Thank You!