Advantech SOM-Express Design Guide
Chapter 2 SOM-Express Overview 25
0xEA00-0xEA0F Intel(R) 82801GBM/GHM (ICH7-M Family) Serial ATA Storage
Controller - 27C4
0xEB00-0xEB1F Intel(R) 82801G (ICH7 Family) USB Universal Host Controller -
27CB
0xEC00-0xEC1F Intel(R) 82801G (ICH7 Family) USB Universal Host Controller -
27CA
0xED00-0xED1F Intel(R) 82801G (ICH7 Family) USB Universal Host Controller -
27C9
0xEE00-0xEE1F Intel(R) 82801G (ICH7 Family) USB Universal Host Controller -
27C8
0xEF00-0xEF07 Mobile Intel(R) 945GM Express Chipset Family
Table 2.13 SOM-5782 Alternative Device Resources
Alternative Device Resources
COM1 3F8/IRQ4*, 2F8/IRQ3, 3E8/IRQ4, 2E8/IRQ3, Disable
COM2 3F8/IRQ4, 2F8/IRQ3*, 3E8/IRQ4, 2E8/IRQ3, Disable
LPT1 378/IRQ7*, 278/IRQ5, 3BC/IRQ7, Disable
2.4 PCI Routing
Table 2.14 Advantech SOM-Express Module PCI Routing
SOM-5780 PCI Device IRQ REQ GNT IDSEL
82541PI INTB# REQ5 GNT5 AD25
- - - - -
2.5 DC Specifications
The Advantech’s SOM-Express modules power consumption properties have been
measured and list in Table 6.1
2.5.1 Interface I/O Voltage
2.5.1.1 PCI Bus
Table 2.15 DC specifications for 5V signaling of PCI Bus
Symbol Parameter Min Max Units Note
Vcc Supply Voltage 4.75 5.25 V
Vih
Input High Voltage 2.0 Vcc+0.5 V
Vil
Input Low Voltage -0.5 0.8 V
Voh
Output High Voltage 2.4 - V
Vol
Output Low Voltage - 0.55 V *1
*1. Signals without pull-up resistors must have 3 mA low output current. Signals requiring pull
up must have 6 mA; the latter include, FRAME#, TRDY#, IRDY#, DEVSEL#, STOP#, SERR#,
PERR#, LOCK#, INTA#, INTB#, INTC#, INTD#.
