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
16
(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 -
