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Signal Definitions
(Continued)
2.4.8
Universal Serial Bus (USB) Interface Signals
Signal Name
Ball No.
Type
Description
Mux
POWER_EN
AD19
O
Power Enable.
This signal enables the power to a self-
powered USB hub.
---
OVER_CUR#
AE19
I
Overcurrent.
This signal indicates that the USB hub has
detected an overcurrent on the USB.
---
DPOS_PORT1
AD7
I/O
USB Port 1 Data Positive.
This signal is the Universal
Serial Bus Data Positive for port 1.
---
DNEG_PORT1
AE7
I/O
USB Port 1 Data Negative.
This signal is the Universal
Serial Bus Data Negative for port 1.
---
DPOS_PORT2
AF7
I/O
USB Port 2 Data Positive.
This signal is the Universal
Serial Bus Data Positive for port 2.
---
DNEG_PORT2
AF8
I/O
USB Port 2 Data Negative.
This signal is the Universal
Serial Bus Data Negative for port 2.
---
DPOS_PORT3
AD8
I/O
USB Port 3 Data Positive.
This signal is the Universal
Serial Bus Data Positive for port 3.
---
DNEG_PORT3
AE8
I/O
USB Port 3 Data Negative.
This signal is the Universal
Serial Bus Data Negative for port 3.
---
2.4.9
Serial Port (UART) and Infrared (IR) Interface Signals
Signal Name
Ball No.
Type
Description
Mux
SIN
AD11
I
Serial Input.
Receive composite serial data from the
communications link (peripheral device, modem or other
data transfer device).
F_C/BE1#
SOUT
AE11
O
Serial Output.
Send composite serial data to the com-
munications link (peripheral device, modem or other data
transfer device). These signals are set active high after a
system reset.
F_C/BE2#
RTS#
AF11
O
Request to Send.
When low, indicates to the modem or
other data transfer device that the corresponding UART
is ready to exchange data. A system reset sets these sig-
nals to inactive high, and loopback operation holds them
inactive.
GPIO7+
IDE_DACK1#+
F_C/BE3#
CTS#
AC12
I
Clear to Send.
When low, indicates that the modem or
other data transfer device is ready to exchange data.
GPIO8+
IDE_DREQ1+
SMI_O
DTR#/BOUT
AD12
O
Data Terminal Ready Output.
When low, indicates to
the modem or other data transfer device that the UART is
ready to establish a communications link. After a system
reset, this ball provides the DTR# function and sets this
signal to inactive high. Loopback operation drive them
inactive.
Baud Output.
Provides the associated serial channel
baud rate generator output signal if test mode is selected
(i.e., bit 7 of the EXCR1 Register is set).
GPIO6+
IDE_IOR1#+
INTR_O
RI#
AF19
I
Ring Indicator.
When low, indicates to the modem that a
telephone ring signal has been received by the modem.
Monitored during power-off for wakeup event detection.
GPIO11+IRQ15