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Chapter 3
Table 3-17. SMBus Reserved Addresses
Component
Serial EEPROM (SEEP)
SDRAM EPROM
Clock Generator (ICS9250)
Southbridge (VT82C686B)
Thermal Sensor (MAX1617)
USB Signals (USB0 and USB1)
The LittleBoard 550 contains one root USB hub with four functional USB ports. This connector
(Utility 2) provides two of the four USB ports (USB0 and USB1). The hub is USB v.1.1 and Intel
Universal HCI v.1.1 compatible.
Features implemented in the USB ports include the following:
•
One root hub and two USB ports on this connector
•
USB v.1.1 and Intel Universal HCI v.1.1 compatible
•
Integrated physical layer transceivers
•
Over-current detection status (software) on all four USB ports
• Over-current fuses for all four ports on the LittleBoard 550 board. See Table 2-3.
NOTE
LittleBoard 550
Address Binary
1010,010x
1010,000x
1101,001x
0000,000x
0011,0010x
Ampro does not recommend connecting a USB boot device to the
LittleBoard 550 through an external hub. Instead, connect the USB
boot device directly to the LittleBoard 550. Refer to Chapter 4, BIOS
Setup for more information.
Reference Manual
b
b
b
(default) Programmable Master
b
b
Hardware
49
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