26
Interfaces
3.2
USB Interfaces
The CM1-86DX3 provides one root USB hub and two functional USB ports, supporting USB
EHCI v2.0 and over-current detection.
Table 3-3 describes the pin signals of the USB0 interface, which uses a single-row, 5-pin,
right-angle header with 0.100" (2.54mm) pitch.
Note
: The shaded table cells denote power or ground.
Table 3-4 describes the pin signals of the USB1 interface, which uses a single-row, 5-pin, verti-
cal header with 0.079" (2mm) pitch.
Note
: The shaded table cells denote power or ground.
3.3
Utility Interface
The Utility interface provides various utility and I/O signals on the module and consists of a
10-pin, 0.1" (2.54mm) pitch header. The Vortex CPU drives the signals on the Utility interface,
and Table 3-5 provides the signal definitions.
X
PS/2 Keyboard and PS/2 Mouse
X
Battery
X
Reset Switch
X
Speaker
3.3.1
Keyboard
The signal lines for a PS/2 keyboard are provided from the Vortex CPU to the Utility interface.
3.3.2
Mouse
The signal lines for a PS/2 mouse are provided from the Vortex CPU to the Utility interface.
3.3.3
Battery
An external battery input connection is provided through the Utility interface to support a battery
backup for the CMOS RAM and the RTC (Real Time Clock).
Table 3-3: USB0 Interface Pin Signals (CN19)
Pin #
Signal
Description
1
USB0PWR
USB Power – VCC (+5V +/-5%) power goes to the port through an on-board
fuse. Port is disabled if this input is low.
2
USB0N
USB0 Port Data Negative
3
USB0P
USB0 Port Data Positive
4
GND
USB0 Port ground
5
SHIELD
USB0 Port shield
Table 3-4: USB1 Interface Pin Signals (CN20)
Pin #
Signal
Description
1
USB1PWR
USB Power – VCC (+5V +/-5%) power goes to the port through an on-board
fuse. Port is disabled if this input is low.
2
USB1N
USB1 Port Data Negative
3
USB1P
USB1 Port Data Positive
4
GND
USB1 Port ground
5
SHIELD
USB1 Port shield