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Advantech SOM-Express Design Guide
Chapter 5 Carrier Board Design Guidelines 73
TYPE2# TYPE1# TYPE0#
X X NC Pin-Out Type 1
NC NC GND Pin-Out Type 2
NC NC NC Pin-Out Type 3 (no IDE)
NC GND GND Pin-Out Type 4 (no PCI)
NC GND NC Pin-Out Type 5 (no
IDE,PCI)
The Carrier Board should implement combinatorial logic that
monitors the module TYPE pins and keeps power off (e.g.
deactivates the ATX_ON signal for an ATX power supply) if an
incompatible module pin-out type is detected. The Carrier
Board logic may also implement a fault indicator such as an
LED.
B12 PWRBTN# I
Power button to bring system out of S5 (soft off), active on
rising edge.
B49 SYS_RESET# I
Reset button input. Active low input. System is held in hardware
reset while this input is low, and comes out of reset upon
release.
B50 CB_RESET# O
Reset output from module to Carrier Board. Active low. Issued
by module chipset and may result from a low SYS_RESET#
input, a low PER_OK input, a VCC_12V power input that falls
below the minimum specification, a watch dog timeout, or may
be initiated by the module software.
B24 PWR_OK I
Power OK from main power supply. A high value indicates that
the power is good
B18 SUS_STAT# O
Indicates system suspend operation; used to notify LPC
devices.
A15 SUS_S3# O
Indicates system is in Suspend to RAM state. Active low output.
A18 SUS_S4# O
Indicates system is in Suspend to Disk state. Active low output.
A24 SUS_S5# O
Indicates system is in Soft Off state. Also known as “PS_ON”
and can be used to control an ATX power supply.
B66 WAKE0# I
PCI Express wake up signal.
B67 WAKE1# I
General purpose wake up signals. May be used to Implement
wake-up on PS2 keyboard or mouse activity.
A27 BATLOW# I
Indicates that external battery is low.
B35 THRM# I
Input from off-module temp sensor indicating an over-temp
situation.
A35 THRMTRIP# I
Active low output indicating that the CPU has entered thermal
shutdown.
VCC
Figure 5-38 Speaker Connections
- Advantech 1
- Notices 2
- Revision History 2
- Table of Contents 3
- 4 Table of Contents 4
- Table of Contents 5 5
- 6 Table of Contents 6
- Table of Contents 7 7
- 8 Table of Contents 8
- Chapter 1 Introduction 9
- 1.2 Referenced Documents 10
- 2.1 Overview 11
- 2.2 Specifications 13
- 2.2.1 SOM-5780 14
- 2.2.2 SOM-5782 16
- 2.2.3 SOM-DB5700 18
- 2.3 System Resources 19
- 2.3.1 SOM-5780 Resources 19
- 2.3.2 SOM-5782 Resources 22
- 2.4 PCI Routing 25
- 2.5 DC Specifications 25
- 2.5.1 Interface I/O Voltage 25
- 2.5.1.3 Audio 27
- 2.5.1.4 VGA 27
- 2.5.1.5 LCD 28
- 2.5.1.6 IDE 28
- 2.5.1.7 Ethernet 28
- 2.5.1.8 TV-Out Bus 28
- 2.5.1.9 IrDA 28
- 2.6 AC Specification 29
- 2.6.1 PCI-Bus AC Spec 29
- 2.6.3 Audio AC Spec 29
- 2.6.4 VGA AC Spec 29
- 2.6.5 IDE AC Spec 30
- 2.6.6 I2C AC Spec 30
- 2.6.7 SMBus AC Spec 30
- Chapter 3 Pin Assignments 31
- 3.1 Row A 32
- 3.2 Row B 33
- 3.3 Row C 34
- 3.4 Row D 35
- 4.1 Nominal Board Stack-Up 36
- Thickness 37
- 4.3 Alternate Stack Ups 39
- 5.1 PCI-Bus 40
- 5.1.1 Signal Description 40
- 5.1.2 Design Guidelines 41
- Vtest 0.4 Vcc 1.5 V 42
- Tskew 2 (max) 2 (max) ns 42
- 5.1.3 Layout Guidelines 44
- Carrier 45
- 5.1.4 Application Notes 46
- 5.2.1 Signal Description 47
- 5.2.2 Design Guidelines 47
- 5.2.3 Layout Guideline 48
- SOM-Express 49
- USB Connector 49
- 5.2.3.4 Stubs 50
- 5.3.1 Signal Description 51
- 5.3.2 Design Guidelines 51
- 5.3.2.3 Azalia: 52
- Analog Ground 53
- 5.3.3 Layout Guidelines 54
- ± 15% 54
- 5.4 VGA 56
- 5.4.1 Signal Description 56
- 5.4.2 Design Guidelines 57
- 5.4.3 Layout Guideline 57
- VGA Connector 58
- 5.5 LVDS 59
- 5.5.1 Signal Description 59
- 5.5.2 Design Guideline 59
- 5.5.3 Layout Requirements 60
- 5.6 Primary IDE0 61
- 5.6.1 Signal Description 61
- 5.6.2 Design Guidelines 61
- IDE bus IDE cable 62
- Total Max 62
- Length 13 inches 62
- Carrier Board 62
- 5.6.3 Layout Guidelines 63
- 5.7 Ethernet 64
- 5.7.1 Signal Descriptions 64
- 5.7.2 Design Guidelines 64
- LAN Connector 65
- 5.7.3 Layout Guidelines 66
- 5.7.3.2 Transformer 67
- 5.7.3.3 Critical Dimensions 68
- 5.8 TV-Out 70
- 5.8.1 Signal Descriptions 70
- 5.8.2 Design Guidelines 70
- TV DAC Filter 71
- 5.9 Miscellaneous 72
- Carrier board 74
- 5.10 PCI Express Bus 77
- 5.10.1 Signal Description 77
- Pin Signal I/O Description 77
- 5.10.3.1 Differential pairs 81
- Guidelines 82
- L1 L2 L3 Capacitor Value 83
- L1 L2 Capacitor Value 83
- 5.11 Serial ATA 84
- 5.11.1 Signal Description 84
- 5.11.2 Design Guidelines 84
- 5.11.3 Layout Guidelines 85
- 5.12 LPC 87
- 5.12.1 Signal Description 87
- 5.12.2 Design Guidelines 87
- 5.12.3 Layout Guidelines 87
- 5.12.4 Application Notes 88
- 5.12.4.3 LPT/Floppy 89
- 5.12.4.4 EMI Considerations 89
- Parallel Port 90
- 6.2 Design Guidelines 95
- 8.1 Material of Heatsink 101
- 8.4 Grounding Issues 102
- 8.8.1 Vendor List 106
- 8.8.2 Heat-Spreader 106
- 8.8.3 Heat-Sink 107
- 8.8.4 Thermal Pad 108
- M2.5*6 5 109
- M2.5*16 5 109
- Quantity 109
- 8.8.6 Fan 110
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