KTD-S0001-0
Page 47
Appendix A: System Resources
JRex
plus
LX
User's Guide
A.5 PCI
Devices
All devices follow the Peripheral Component Interconnect 2.2 (PCI 2.2) specification. Please see the speci-
fication for more details.
PCI Device
PCI IRQ
Comment
Host Bridge
None
Chipset
Graphics Controller
INTA
Chipset
ISA Bridge
None
Chipset
IDE Controller
None
Chipset
USB Controller 1
INTD
Chipset
USB Controller 2
INTD
Chipset
Audio Controller
INTB
Chipset
Encryption Controller
INTA
Chipset
LAN Controller
INTA
PCI bus (AD28)
S-ATA Controller
INTB
PCI bus (AD29)
A.6
System Management Bus (SMBus)
The JRex
plus
LX uses an onboard System Management Bus (SMBus). This bus is not available on a peri-
pheral connector and therefore cannot be used for external SMBus devices.
SMBus Address
Device
Comment
30h / 31h
GPIO Controller
Winbond I/O controller W83601
A0h / A1h
SPD Eeprom (DDR-SDRAM)
Part of the DDR RAM module
Warning:
There are more devices connected to the SMBus than listed in this table but access to these devices in not permitted.
Don’t access any other device addresses except those listed above.
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