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Express-LPC User’s ManualPage 26
6.2 GPIO
GPIO library support is limited to GPIO signals that originate from the Computer on Module
and extended to the carrier board. COM Express modules support 4 GPO and 4 GPI signals.
Some of ADLINK’s COM Express boards can configure all 8 ports for GPI or GPO use.
GPIO signals can be monitored and controlled by using the ADLINK Intelligent Device
Interface (AIDI) library that is compatible and identical across all ADLINK COM Express
modules and all supported operating systems.
The COM Express type II standard assigns the following pins for either GPI or GPO
Pin Signal Type # AIDI ID (bit) Remark
A54 GPI0 0 Express-LPC can configure this pin for GPI and GPO
A63 GPI1 1 Express-LPC can configure this pin for GPI and GPO
A67 GPI2 2 Express-LPC can configure this pin for GPI andGPO
A85 GPI3 3 Express-LPC can configure this pin for GPI andGPO
A93 GPO0 4 Express-LPC can configure this pin for GPI and GPO
B54 GPO1 5 Express-LPC can configure this pin for GPI and GPO
B57 GPO2 6 Express-LPC can configure this pin for GPI and GPO
B63 GPO3 7 Express-LPC can configure this pin for GPI and GPO
AIDI Demo Program
- GPIO Tab
The AIDI Demo Program displays
current GPI or GPO status and
allows reading of GPI and writing
to GPO.
The table above links logical port
numbers in AIDI to physical port
numbers on the COM Express
board-to-board connector.
For boards that support multi-
direction the “SetDirection” button
can configure the port for either
GPI or GPO
- Express-LPC 1
- Revision History 2
- Table of Contents 3
- Disclaimer 5
- Environmental Responsibility 5
- Trademarks 5
- Conventions 6
- 1 Introduction 7
- 2 Specifications 8
- 2.3 Audio 9
- 2.5 Multi I/O 9
- 2.7 Super I/O 9
- 2.8 Power Specifications 10
- 3 Functional Diagram 11
- 4 Mechanical Dimensions 12
- 5.1 COM Express 13
- Type 2 compatible pinout 13
- 5.3 Pin Definitions 14
- Pin Definitions (cont’d) 15
- 5.4 Signal Descriptions 16
- Signal Descriptions (cont’d) 17
- 6 Embedded Functions 25
- 6.2 GPIO 26
- 6.3 Hardware Monitoring 27
- 7 System Resources 28
- 7.3 Legacy I/O Map 29
- Legacy I/O Map (cont’d) 30
- PIC Mode 30
- APIC Mode 31
- 7.6 PCI Interrupt Routing Map 32
- 8 BIOS Setup Utility 33
- 8.1.1 Main Setup Menu 34
- 8.1.2 Navigation 35
- 8.2 Main Setup 37
- 8.3 Advanced BIOS Setup 38
- 8.3.1 CPU Configuration 39
- CPU Configuration Settings 39
- Max CPUID Value Limit 39
- 8.3.2 Chipset Configuration 41
- DRAM Frequency 41
- Configure DRAM Timing by SPD 41
- APIC ACPI SCI IRQ 41
- Internal Graphics Mode Select 42
- DVMT Mode Select 42
- 8.3.4 IDE Configuration 44
- IDE Configuration Settings 44
- ATA/IDE Configuration 44
- Legacy IDE Channels 44
- Hard Disk Write Protect 45
- IDE Detect Time Out 45
- ATA(PI)80Pin Cable Detection 45
- 8.3.5 AHCI Configuration 45
- AHCI Ports 46
- Onboard LAN Boot ROM 47
- HD Audio Controller 47
- SMBus Controller 47
- SuperIO Configuration Screen 48
- Floppy A 48
- OnBoard Floppy Controller 48
- Serial Port1 Address 49
- Serial Port2 Address 49
- Parallel Port Address 49
- Parallel Port Mode 49
- 8.3.7 USB Configuration 50
- USB Configuration Settings 50
- Parallel Port IRQ 50
- Active State Power-Management 53
- PCIE Ports 0-3 Configuration 53
- PCIE High Priority Port 53
- Remote Access 55
- Serial Port Number 55
- Remote Access Configuration 55
- Option Description 56
- 8.3.11 Trusted Computing 57
- Execute TPM Command 57
- 8.4 Power Management 58
- ACPI Aware O/S 59
- ACPI Version Features 59
- ACPI APIC Support 59
- USB Device Wakeup from S3/S4 59
- AMI OEMB Table 59
- Suspend mode 60
- Headless mode 60
- Restore on AC Power Loss 60
- ACPI OS Shutdown Mode 60
- Power Management/APM 61
- Power Button Mode 61
- Suspend Time Out 61
- 8.4.2 APM Configuration 61
- Video Power Down Mode 62
- Throttle Temperature 63
- Throttle Duty 63
- Critical Temperature 63
- 8.5 Boot Setup 64
- Quick Boot 65
- Quiet Boot 65
- AddOn ROM Display Mode 65
- Bootup Num-Lock 66
- PS/2 Mouse Support 66
- Wait for ‘F1’ If Error 66
- Hit ‘DEL’ Message Display 66
- Interrupt 19 Capture 66
- Boot Device Priority 67
- Boot Device Groups 67
- 8.6 Security Setup 68
- 8.6.3 Change User Password 70
- 8.6.4 Clear User Password 70
- 8.7 Exit Menu 71
- Discard Changes 72
- Load Optimal Defaults 72
- Load Failsafe Defaults 72
- Viewing BIOS Checkpoints 73
- 9.3 POST Code Checkpoints 76
- POST Code Checkpoints cont’d: 77
- 9.5 DIM Code Checkpoints 78
- 9.6 ACPI Runtime Checkpoints 79
- 9.7 Boot Block Beep Codes 80
- 9.8 POST BIOS Beep Codes 80
- Important Safety Instructions 82
- Getting Service 84
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