
ÉlanSC310 Microcontroller Evaluation Board User’s Manual
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I/O
The ÉlanSC310 microcontroller integrates several standard I/O interfaces. A
16C450-compatible UART, bidirectional parallel port is controlled by the
ÉlanSC310 microcontroller. In addition, the ÉlanSC310 microcontroller
evaluation board contains a Super I/O, which contains a 16C550 UART, a floppy
disk controller, and IDE hard drive interface.
A standard 9-pin connector is provided for an extended PC keyboard. A PS/2 port
is provided for use with a PS/2 style mouse. Both the keyboard and PS/2 mouse
are driven by the 8042.
PS/2 Mouse
A PS/2 port has been provided on the evaluation board for a PS/2-style mouse.
This device is driven by the 8042 keyboard controller.
While in ISA or Local Bus mode, the ÉlanSC310 microcontroller IRQ12 signal is
connected to the IRQ12 signal on the 8042 to control the PS/2 mouse. (See the
settings for JP17 and JP18 in the table below.)
Bus Mode
JP17
JP18
1-2
2-3
Full ISA
Enables Super I/O
serial port IRQ
Do not use
Closed to enable
PS/2 mouse IRQ
Local Bus
Enables Super I/O
serial port IRQ
Do not use
Closed to enable
PS/2 mouse IRQ
evalbd.book : ch2 Page 20 Thursday, August 8, 1996 2:34 PM