User manual

Advantech SOM-Express Design Guide

Chapter 2 SOM-Express Overview 19

2.3 System Resources

This section demonstrates resources distribution of Advantech’s SOM-Express

modules, including IRQ, DMA, memory map, and I/O map.

2.3.1 SOM-5780 Resources

Table 2.4 SOM-5780 IRQ Resources

IRQ Description

0 (ISA) System timer

1 (ISA) Standard 101/102-Key or Microsoft Natural PS/2 Keyboard

2 -

3 (ISA) Communications Port (COM2)

4 (ISA) Communications Port (COM1)

5 -

6 (ISA)Standard floppy disk controller

7 (ISA)ECP Printer Port (LPT1)

8 (ISA) System CMOS/real time clock

9 (ISA) Microsoft ACPI-Compliant System, Intel(R) 82801FBM SMBus Controller - 24C3

10 -

11 -

12 (ISA) PS/2 Compatible Mouse

13 (ISA) Numeric data processor

14 (ISA) Primary IDE Channel

15 (ISA) Secondary IDE Channel

(PCI) Intel(R) 82915 GM Graphics Controller, Intel(R) 82801FBM USB Universal Host

Controller - 24C2

17 (PCI) Realtek AC'97 Audio

18 (PCI) Intel(R) 82801FBM USB Universal Host Controller - 24C7

19 (PCI) 19 Intel(R) 82801FBM USB Universal Host Controller - 24C4

20 -

21 -

22 -

23 (PCI) Intel PCI to USB Enhanced Host Controller

Table 2.5 SOM-5780 DMA Resources

DMA Description

0 Cascade to DMA4

1 -

2 Standard floppy disk controller

3 ECP Printer Port (LPT1)

4 Direct memory access controller

5 -

6 -

7 -