EP80579 Datasheet, PDF (1755/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
48.4.3.8 Universal Serial Bus (USB) Interface
Table 48-18. USB Interface Signals
Signal Name
USBp0
USBn0
USBp1
USBn1
OC[1]#
OC[0]#
USB_RBIASp
USB_RBIASn
CLK48
IO Type
LV Diff
LV Diff
LV Diff
LV Diff
LVTTL,3.3V
LVTTL,3.3V
Analog
Analog
LVTTL,3.3V
TOTAL
Direction
Ball
Count
External
Pull-Up/
Down
[Ohms]
BSC/
XOR
Signal Description Normal/Alternate Mode
I/O
1
XOR
USB Port 0 Signal (Differential): The positive
side of the differential pair that is used to
transmit Data/Address/Command signals for
USB port 0.
Note: External resistors are not required on
these signals. The chip integrates the 15 K-ohm
pull-down and provides an output driver
impedance of 45 ohm which requires no external
series resistor.
I/O
1
XOR
USB Port 0 Signal (Differential): The negative
side of the differential pair that is used to
transmit Data/Address/Command signals for
USB port 0 (see USBp0).
I/O
1
XOR
USB Port 1 Signal (Differential): The positive
side of the differential pairs that are used to
transmit Data/Address/Command signals for
USB port 0.
Note: External resistors are not required on
these signals. The chip integrates the 15 K-ohm
pull-down and provides an output driver
impedance of 45 ohm which requires no external
series resistor.
I/O
1
XOR
USB Port 1 Signal (Differential): The negative
side of the differential pair that is used to
transmit Data/Address/Command signals for
USB port 0 (see USBp1).
USB Port 1 Overcurrent Indicator: This signal
I
1
10K Up
BSC
sets corresponding bits in the USB controller to
indicate that an overcurrent condition has
occurred on USB Port 1.
USB Port 0 Overcurrent Indicator: This signal
I
1
10K Up
BSC
sets corresponding bits in the USB controller to
indicate that an overcurrent condition has
occurred on USB Port 0.
O
1
USB Controller Resistor Bias (Positive): Analog
connection point for an external resistor. Used to
set transmit currents and internal load resistors.
I
1
USB Controller Resistor Bias (Negative): Analog
connection point for an external resistor. Used to
set transmit currents and internal load resistors
I
1
USB Controller Reference Clock: 48MHz
reference clock for the USB controller.
9
August 2009
Order Number: 320066-003US
Intel^® EP80579 Integrated Processor Product Line Datasheet
1755