Intel 80331 Guide

Intel®80331 I/O Processor

Design Guide

March 2005

Order Number:273823-003

Intel® 80331 I/O Processor Design Guide

Contents

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Intel® 80331 I/O Processor Design Guide

Contents

1 Introduction..................................................................................................................................11

1.1 About This Document .........................................................................................................11

1.1.1 Terminology and Definitions ..................................................................................12

1.1.2 Other Relevant Documents ...................................................................................14

1.2 About the Intel®80331 I/O Processor.................................................................................15

2 Package Information ...................................................................................................................17

2.1 Power Plane Layout............................................................................................................21

2.2 Intel®80331 I/O Processor Applications.............................................................................22

3Terminations................................................................................................................................23

3.1 Analog Filters......................................................................................................................27

3.1.1 VCCPLL Pin Requirements......................................................................................27

3.2 DDR Resistor Compensation..............................................................................................28

3.3 DDR Driver Compensation .................................................................................................29

4 Routing Guidelines......................................................................................................................31

4.1 General Routing Guidelines................................................................................................31

4.2 Crosstalk.............................................................................................................................32

4.3 EMI Considerations ............................................................................................................34

4.4 Power Distribution and Decoupling.....................................................................................34

4.4.1 Decoupling.............................................................................................................34

4.5 Trace Impedance................................................................................................................36

5 Board Layout Guidelines............................................................................................................37

5.1 Motherboard Stack Up Information.....................................................................................37

5.2 Adapter Card Stackup ........................................................................................................39

6 PCI-X Layout Guidelines.............................................................................................................41

6.1 Interrupt Routing and IDSEL Lines.....................................................................................41

6.1.1 PCI Arbitration .......................................................................................................42

6.1.2 PCI Resistor Compensation ..................................................................................42

6.2 PCI General Layout Guidelines ..........................................................................................43

6.3 PCI-X Topology Layout Guidelines.....................................................................................43

6.4 Intel®80331 I/O Processor PCI/X Layout Analysis ............................................................44

6.4.1 PCI Clock Layout Guidelines.................................................................................45

6.4.2 Single-Slot at 133 MHz..........................................................................................48

6.4.3 Embedded PCI-X 133 MHz ...................................................................................49

6.4.4 Embedded PCI-X 133 MHz Alternate Topology ....................................................50

6.4.5 Combination of PCI-X 133 MHz Slot and Embedded Topology ............................51

6.4.6 Combination PCI-X 133 MHz Slot and Embedded Topology 2 .............................52

6.4.7 PCI-X 100 MHz Slot Topology...............................................................................53

6.4.8 PCI-X 100 MHz Embedded Topology....................................................................54

6.4.9 PCI-X 100 MHz Slot and Embedded Topology......................................................55

6.4.10 PCI-X 100 MHz Slot and Embedded Topology 2...................................................56

6.4.11 PCI-X 66 MHz Slot Topology.................................................................................57

6.4.12 PCI-X 66 MHz Embedded Topology......................................................................58

6.4.13 PCI-X 66 MHz Mixed Mode Topology....................................................................59

Intel® 80331 I/O Processor Design Guide

Contents

6.4.14 PCI 66 MHz Slot Topology ....................................................................................60

6.4.15 PCI 66 MHz Embedded Topology .........................................................................61

6.4.16 PCI 66 MHz Mixed Mode Topology.......................................................................62

6.4.17 PCI 33 MHz Slot Topology ....................................................................................63

6.4.18 PCI 33 MHz Embedded Mode Topology...............................................................64

6.4.19 PCI 33 MHz Mixed Topology.................................................................................65

7 Memory Controller.......................................................................................................................67

7.1 DDR Bias Voltages.............................................................................................................67

7.2 Intel®80331 I/O Processor DDR Overview........................................................................68

7.3 DDR 333 Signal Integrity Simulation Conditions ................................................................69

7.3.1 DDR 333 Stackup Example...................................................................................70

7.4 DDR Layout Guidelines......................................................................................................72

7.4.1 Source Synchronous Signal Group .......................................................................72

7.4.1.1 Routing Requirements...........................................................................73

7.4.2 Clock Signal Groups..............................................................................................81

7.4.2.1 Control Signals Termination...................................................................85

7.4.3 Embedded Configuration.......................................................................................89

7.4.3.1 DDR 333 Source Synchronous Routine Guidelines ..............................89

7.4.3.2 DDR 333 Embedded Clock Routing Recommendations .......................92

7.4.3.3 DDR 333 Embedded Address/Command/Control Routing Guidelines..96

7.5 DDR II 400 Layout Guidelines..........................................................................................101

7.5.1 Simulation Conditions..........................................................................................102

7.5.2 DDRII-400 Trace Width/Impedance Requirements .............................................103

7.5.3 DIMM Layout Design...........................................................................................104

7.5.3.1 DDR II 400 DIMM Source Synchronous Routing.................................104

7.5.3.2 DDRII 400 Clock Routing Guidelines...................................................107

7.5.3.3 DDRII 400 Address/Command/Control Routing Guidelines ................108

7.5.4 Embedded Configuration.....................................................................................110

7.5.4.1 DDRII 400 Embedded Source Synchronous Routine Guidelines........110

7.5.4.2 DDRII 400 Embedded Clock Routing Recommendations ...................113

7.5.4.3 DDRII 400 Embedded Address/Command/Control Routing Guidelines....

116

7.6 DDR Signal Termination...................................................................................................120

7.7 DDR Termination Voltage.................................................................................................121

7.8 DDR VREF Voltage............................................................................................................121

8 Peripheral Local Bus.................................................................................................................123

8.1 Peripheral Bus Signals .....................................................................................................123

8.1.1 Address/Data Signal Definitions..........................................................................123

8.1.2 Control/Status Signal Definitions.........................................................................123

8.1.3 Bus Width ............................................................................................................124

8.1.4 Flash Memory Support ........................................................................................125

8.1.5 Layout Guidelines for the Peripheral Bus............................................................126

8.2 Topology Layout Guidelines.............................................................................................127

9 Power Delivery...........................................................................................................................131

9.1 Power Sequencing............................................................................................................131

9.2 Power Failure....................................................................................................................132

9.2.1 Theory of Operation.............................................................................................132

9.2.2 Power Failure Sequence .....................................................................................132

9.2.3 Power Delay ........................................................................................................133

Intel® 80331 I/O Processor Design Guide

Contents

9.3 Battery Backup .................................................................................................................134

9.3.1 Non-Battery Backup Circuits................................................................................135

10 Intel®IQ80331 Evaluation Platform Board ..............................................................................137

11 JTAG Circuitry for Debug .........................................................................................................139

11.1 Requirements ...................................................................................................................139

11.2 JTAG Signals / Header.....................................................................................................140

11.3 System Requirements ......................................................................................................141

11.4 JTAG Hardware Requirements.........................................................................................142

11.4.1 Macraigor Raven and WindRiver Systems visionPROBE / visionICE.................142

11.4.2 ARM Multi-ICE.....................................................................................................142

12 Debug Connectors and Logic Analyzer Connectivity............................................................143

12.1 Probing PCI-X Signals......................................................................................................143

13 References .................................................................................................................................147

13.1 Related Documents ..........................................................................................................147

13.2 Electronic Information.......................................................................................................148

Intel® 80331 I/O Processor Design Guide

Contents

Figures

1Intel

®80331 I/O Processor Functional Block Diagram...............................................................16

2Intel

®80331 I/O Processor 829-Ball FCBGA Package Diagram................................................18

3Intel

®80331 I/O Processor Preliminary Ballout (Top View) .......................................................19

4Intel

®80331 I/O Processor Preliminary Ballout (Bottom View)..................................................20

5Intel

®80331 I/O Processor Power Plane Layout........................................................................21

6Intel

®80331 I/O Processor PCI-X Adapter Card Block Diagram ...............................................22

CCPLL Configuration..................................................................................................................27

8 Intel

®80331 I/O Processor DDRRES Resistor Compensation Circuitry...................................28

9 DDR Driver Compensation Circuitry...........................................................................................29

10 Crosstalk Effects on Trace Distance and Height........................................................................32

11 PCB Ground Layout Around Connectors ...................................................................................33

12 Motherboard Stackup Recommendations ..................................................................................38

13 Adapter Card Stackup ................................................................................................................40

14 Interrupt and IDSEL Mapping.....................................................................................................41

15 PCI RCOMP ...............................................................................................................................42

16 PCI Clock Distribution and Matching Requirements...................................................................45

17 Single-Slot Point-to-Point Topology............................................................................................48

18 Embedded PCI-X 133 MHz Topology ........................................................................................49

19 Embedded PCI-X 133 MHz Alternate Topology.........................................................................50

20 Embedded PCI-X 133 MHz Topology ........................................................................................51

21 Embedded PCI-X 133 MHz Topology ........................................................................................52

22 Slot PCI-X 100 MHz Slot Routing Topology...............................................................................53

23 Embedded PCI-X 100 MHz Routing Topology...........................................................................54

24 Combination of Slot and Embedded PCI-X 100 MHz Routing Topology....................................55

25 Combination of Slots and Embedded PCI-X 100 MHz Routing Topology..................................56

26 PCI-X 66 MHz Slot Routing Topology ........................................................................................57

27 PCI-X 66 MHz Embedded Routing Topology.............................................................................58

28 PCI-X 66 MHz Mixed Mode Routing Topology...........................................................................59

29 PCI 66 MHz Topology ................................................................................................................60

30 PCI 66 MHz Embedded Topology..............................................................................................61

31 PCI 66 MHz Mixed Topology......................................................................................................62

32 PCI 33 MHz Slot Routing Topology............................................................................................63

33 PCI 33 MHz Embedded Mode Routing Topology.......................................................................64

34 PCI 33 MHz Mixed Mode Routing Topology ..............................................................................65

35 100 ohm Differential Trace .........................................................................................................71

36 Source Synchronous Length Matching.......................................................................................73

37 Data Group Length Matching .....................................................................................................73

38 DIMM DQ/DQS Topology...........................................................................................................79

39 DIMM DQ/DQS Split Termination Topology...............................................................................80

40 DDR 333 Registered DIMM Clock Topology..............................................................................83

41 DDR 333 Unbuffered DIMM Clock Topology..............................................................................84

42 Trace Length Requirements for Source Clocked Routing..........................................................85

43 DDR 333 DIMM Unbuffered/Registered Address/CMD Topology Lengths................................87

44 Embedded DDR 333 DQ/DQS Topology ...................................................................................91

45 Embedded DDR 333 Buffered Clock Topology..........................................................................92

46 Embedded DDR 333 Unbuffered Clock Topology......................................................................95

47 Embedded DDR 333 Unbuffered ADDR/CMD Topology ...........................................................98

48 Embedded DDR 333 Registered ADDR/CMD Topology..........................................................100

Intel® 80331 I/O Processor Design Guide

Contents

49 Intel®80331 I/O Processor DDRII 400 DIMM Source Synchronous Routing..........................104

50 DDR II 400 DIMM DQ Topology...............................................................................................106

51 DDR II 400 DIMM DQS Topology.............................................................................................106

52 DDR II 400 DIMM Clock Topology............................................................................................107

53 DDR II 400 DIMM Address/CMD Topology..............................................................................109

54 DDR II 400 DIMM Address/CMD Split Termination Topology..................................................109

55 DDR II 400 Embedded DQ Topology .......................................................................................111

56 DDR II 400 Embedded DQS Topology.....................................................................................112

57 DDR II 400 Embedded Clock Topology....................................................................................115

58 DDR II 400 Embedded Address/Control Topology...................................................................118

59 DDR II 400 Embedded Address/Control Topology With Split Termination...............................119

60 Routing Termination Resistors (top view).................................................................................120

61 DDR VREF Circuit......................................................................................................................121

62 Data Width and Low Order Address Lines ...............................................................................124

63 Four MByte Flash Memory System ..........................................................................................125

64 Peripheral Bus Unlatched Bidirectional Single Load Topology.................................................127

65 Peripheral Bus Latched Bidirectional Single Load Topology....................................................128

66 Peripheral Bus Latched Bidirectional Two Load Topology.......................................................129

67 Power Failure Comparator Circuit ............................................................................................133

68 SCKE Circuit.............................................................................................................................134

69 Intel®IQ80331 Evaluation Platform Board CRB Block Diagram ..............................................137

70 Intel®80331 I/O Processor CRB Form Factor..........................................................................138

71 JTAG Header Pin Out...............................................................................................................140

72 JTAG Signals at Powerup.........................................................................................................141

73 JTAG Signals at Debug Startup................................................................................................141

74 Example Power-Up Circuit for nTRST......................................................................................142

Intel® 80331 I/O Processor Design Guide

Contents

Tables

1 Terminology and Definitions.......................................................................................................12

2 FC-style, H-PBGA Package Dimensions....................................................................................17

3 Terminations: Pull-up/Pull-down.................................................................................................23

4 Decoupling Recommendations...................................................................................................34

5 Motherboard Stack Up, Stripline and Microstrip.........................................................................37

6 Adapter Card Stack Up, Microstrip and Stripline........................................................................39

7 PCI-X Slot Guidelines.................................................................................................................43

8 PCI-X Clock Layout Requirements Summary ............................................................................46

9 PCI-X 133 MHz Single Slot Routing Recommendations............................................................48

10 Embedded PCI-X 133 MHz Routing Recommendations............................................................49

11 Embedded PCI-X 133 MHz Alternate Topology Routing Recommendations.............................50

12 Embedded and Slot PCI-X 133 MHz Routing Recommendations..............................................51

13 Embedded and Slot PCI-X 133 MHz Routing Recommendations..............................................52

14 PCI-X 100 MHz Slot Topology Routing Recommendations .......................................................53

15 PCI-X 100 MHz Embedded Routing Recommendations............................................................54

16 Combination of Slot and Embedded PCI-X 100 MHz Routing Recommendations ....................55

17 Combination of Slot and Embedded PCI-X 100 MHz Routing 2 Recommendations .................56

18 PCI-X 66 MHz Slot Routing Recommendations.........................................................................57

19 PCI-X 66 MHz Embedded Routing Recommendations..............................................................58

20 PCI-X 66 MHz Mixed Mode Routing Recommendations............................................................59

21 PCI 66 MHz Slot Table...............................................................................................................60

22 PCI 66 MHz Embedded Table....................................................................................................61

23 PCI 66 MHz Mixed Mode Table..................................................................................................62

24 PCI 33 MHz Slot Routing Recommendations.............................................................................63

25 PCI 33 MHz Embedded Routing Recommendations .................................................................64

26 PCI 33 MHz Mixed Mode Routing Recommendations ...............................................................65

27 DDR Bias Voltages.....................................................................................................................67

28 DDR II Bias Voltage....................................................................................................................67

29 Core Speed and Memory Configuration.....................................................................................68

30 Simulated DDR 333 Topologies.................................................................................................69

31 Example Topologies for DDR Trace...........................................................................................71

32 x64 DDR Memory Configuration.................................................................................................72

33 x72 DDR Memory Configuration.................................................................................................72

34 Source Synchronous Termination Requirements.......................................................................73

35 Source Synchronous Routing Recommendations......................................................................74

36 DIMM DQ/DQS Topology Lengths.............................................................................................75

37 Die to Ball Internal Lengths ........................................................................................................75

38 DIMM DQ/DQS Split Termination Topology Lengths .................................................................80

39 DIMM Clocked Signal Group Termination..................................................................................81

40 Clock Signal Group Registered/Unbuffered DIMM Routing Requirements................................82

41 Registered DIMM Clock Topology Lengths................................................................................83

42 DDR 333 Unbuffered DIMM Clock Topology Lengths................................................................84

43 Source Clocked Signal Routing..................................................................................................85

44 Control Signals Routing Guidelines............................................................................................86

45 Control Signal DIMM Topology Lengths.....................................................................................88

46 DDR 333 Embedded Source Synchronous Routing Recommendations....................................89

47 Embedded DDR 333 DQ/DQS Topology Lengths......................................................................91

48 DDR 333 Embedded Registered/Unbuffered Clock Routing Recommendations.......................93

Intel® 80331 I/O Processor Design Guide

Contents

49 Embedded DDR 333 Buffered Clock Topology Lengths ............................................................94

50 Embedded DDR 333 Unbuffered Clock Topology Lengths........................................................95

51 DDR 333 Embedded Address/Command Routing Recommendations ......................................96

52 Embedded DDR 333 Unbuffered Address/CMD Topology Lengths...........................................98

53 Embedded DDR 333 Registered Address/CMD Topology Lengths...........................................99

54 x64 DDR Memory Configuration...............................................................................................101

55 x72 DDR Memory Configuration...............................................................................................101

56 DDR II Topologies Simulated ...................................................................................................102

57 Example Topology for DDRII Trace Width/Impedance Requirements .....................................103

58 DDRII 400 DIMM Source Synchronous Routing Recommendations........................................105

60 DDR II 400 DIMM DQS Lengths...............................................................................................106

59 DDR II 400 DIMM DQ Lengths.................................................................................................106

61 DDRII 400 DIMM Clock Routing Recommendations................................................................107

62 DDR II 400 DIMM Clock Lengths..............................................................................................107

63 DDRII 400 DIMM Address/Command/Control Routing Recommendation ...............................108

64 DDR II 400 DIMM Address/CMD Lengths................................................................................109

65 DDRII 400 Embedded Source Synchronous Routing Recommendations................................110

66 DDR II 400 Embedded DQ Lengths .........................................................................................111

67 DDR II 400 Embedded DQS Lengths.......................................................................................112

68 DDRII 400 Embedded Clock Routing Recommendations........................................................113

69 DDR II 400 Embedded Clock (PLL) Lengths............................................................................114

70 DDRII 400 Embedded Address/Command/Control Routing Recommendations......................116

71 DDR II 400 Embedded Address/CMD Lengths ........................................................................117

72 Flash Wait State Profile Programming .....................................................................................125

73 Routing Guideline Bidirectional Single Load.............................................................................127

74 Routing Guideline Latched Bidirectional Latch Single Load.....................................................128

75 Routing Guideline Latch Bidirectional Two Loads....................................................................129

76 Intel®80331 I/O Processor Bias Voltages...............................................................................131

77 Four Peaks Customer Reference Board Features ...................................................................138

78 Logic Analyzer Pod 1................................................................................................................143

80 Logic Analyzer Pod 3................................................................................................................144

79 Logic Analyzer Pod 2................................................................................................................144

82 Logic Analyzer Pod 5................................................................................................................145

81 Logic Analyzer Pod 4................................................................................................................145

83 Logic Analyzer Pod 6................................................................................................................146

84 Design References...................................................................................................................147

85 Intel Related Documentation ....................................................................................................147

86 Electronic Information...............................................................................................................148

Intel® 80331 I/O Processor Design Guide

Contents

Revision History

TaTa

Date Revision Description

March 2005 003 Updated Figure 27, Figure 33, and Figure 49.

October 2004 002

In Chapter 6:

Table 8: added row Preferred Topology: stripline

Table 8: changed Clock Layout Requirements Add-in card

impedance from 60 ohms to 57 ohms.

Changed topology information in Figure 24 and Table 16.

Table 17 Added alternate PCI-X 100MHz Slot and Embedded

Topology Figure 25 and Table 16.

Table 18 Changed Add-in card impedance from 60 ohms +/-

15% to 57 ohms +/- 15%.

In Chapter 7:

DDR 333 Source Synchronous recommendations removed the

requirement for length matching for DQS groups based on

simulations

Removed row in Table 48 “Length Matching Requirements:

between clock groups”. This is required only for unbuffered

clocks and was already mentioned in the previous row.

Table 51: removed row in “Trace Length: 80331 signal Ball to

Series Termination” because the series termination is no

longer needed.

Table 52: Removed Routing Guideline 4 because unbuffered

and registered DIMM’s have the same topology.

Deleted Figure 57 because simulations showed that series

resistors is no longer needed for DDR 333 DIMM control

signals

Table 53: Removed Length Matching within DQS group

recommendation now because length matching will happen

when matching to M_CK.

Changed Embedded DDR 333 DQ/DQS Topology Figure 44

resistor listed as 50 ohms +/- 5% to 51 ohms +/- 5% because

this is a standard value resistor.

In Chapter 9

Removed VCC25/VCC18 from the power up sequence order

and added a note stating that there is no sequence order

requirements for the VCC25 or VCC18 rail.

Other:

Moved the decoupling guidelines from Chapter 3 to Chapter 4.

Removed reference to the Hot Plug controller. This feature is

not part of the 80331 product.

September 2003 001 Initial Release.

Table of contents

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