82801FB Datasheet, PDF (64/786 Pages) Intel Corporation – Intel I/O Controller Hub 6 (ICH6) Family

Signal Description
2.11 USB Interface
Table 2-11. USB Interface Signals
Name
Type
Description
USBP[0]P,
USBP[0]N,
USBP[1]P,
USBP[1]N
USBP[2]P,
USBP[2]N,
USBP[3]P,
USBP[3]N
USBP[4]P,
USBP[4]N,
USBP[5]P,
USBP[5]N
USBP[6]P,
USBP[6]N,
USBP[7]P,
USBP[7]N
OC[3:0]#
OC[4]# / GPI[9]
OC[5]# / GPI[10]
OC[6]# / GPI[14]
OC[7]# / GPI[15]
USBRBIAS
USBRBIAS#
Universal Serial Bus Port [1:0] Differential: These differential pairs are used
to transmit Data/Address/Command signals for ports 0 and 1. These ports can
be routed to UHCI controller #1 or the EHCI controller.
I/O
NOTE: No external resistors are required on these signals. The ICH6
integrates 15 kΩ pull-downs and provides an output driver impedance
of 45 Ω which requires no external series resistor
Universal Serial Bus Port [3:2] Differential: These differential pairs are used
to transmit data/address/command signals for ports 2 and 3. These ports can
be routed to UHCI controller #2 or the EHCI controller.
I/O
NOTE: No external resistors are required on these signals. The ICH6
integrates 15 kΩ pull-downs and provides an output driver impedance
of 45 Ω which requires no external series resistor
Universal Serial Bus Port [5:4] Differential: These differential pairs are used
to transmit Data/Address/Command signals for ports 4 and 5. These ports can
be routed to UHCI controller #3 or the EHCI controller.
I/O
NOTE: No external resistors are required on these signals. The ICH6
integrates 15 kΩ pull-downs and provides an output driver impedance
of 45 Ω which requires no external series resistor
Universal Serial Bus Port [7:6] Differential: These differential pairs are used
to transmit Data/Address/Command signals for ports 6 and 7. These ports can
be routed to UHCI controller #4 or the EHCI controller.
I/O
NOTE: No external resistors are required on these signals. The ICH6
integrates 15 kΩ pull-downs and provides an output driver impedance
of 45 Ω which requires no external series resistor
Overcurrent Indicators: These signals set corresponding bits in the USB
controllers to indicate that an overcurrent condition has occurred.
I OC[7:4]# may optionally be used as GPIs.
NOTE: OC[7:0]# are not 5 V tolerant.
O
USB Resistor Bias: Analog connection point for an external resistor. This
signal is used to set transmit currents and internal load resistors.
I
USB Resistor Bias Complement: Analog connection point for an external
resistor. This signal is used to set transmit currents and internal load resistors.
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Intel^® I/O Controller Hub 6 (ICH6) Family Datasheet