Detailed hardware description
Issue G
109
Super IO
On the APOLLO V1Ix boards, an SMSC LPC47M292 Super IO controller provides legacy
IO support. On the APOLLO V2Ix boards, an SMSC SCH3112 provides the SuperIO
support. On both boards the SuperIO resides on the LPC bus and provides:
•
Two serial ports.
•
Keyboard and mouse PS/2 interface.
•
Parallel port.
•
Floppy drive.
•
IrDA.
•
General purpose IO for the front panel connector.
On the APOLLO V1Ix board an additional functional block incorporated into the SuperIO
provides an SMBUS based hardware monitor which is used to monitor voltages and
temperatures on the board. The APOLLO V2Ix board provides hardware monitor support
via an ISA mapped set of indexed registers.
Serial ports
The APOLLO provides four high speed 16C550 compatible UARTs, two via the SuperIO
and a further two via a dual PCI based UART. See page
the PCI UART based serial ports COM3 and COM4.
COM1 and COM2 are interfaced via the SuperIO and can be used as standard RS232
serial interfaces. COM2 is also selectable between RS232 and IrDA operation.
The
Serial Configuration
screen in the BIOS lets you specify the base I/O address and
IRQ for COM1 and COM2. See page
for details.
The following table shows the hardware configuration for each channel:
Port
RS232 connector
IrDA/ASK-IR
connector
RS422/485
connector
Max Baud Rate
COM1 J7B
N/A N/A 460.8K
COM2 J7C
J26 N/A 460.8K
1
The maximum baud rate for IrDA is 115.2K and ASK-IR is 57.6K.
COM2 operation
COM2 is selectable between RS232 and two infrared transmission schemes IrDA or
Sharp ASK-IR. This is done in the
Serial Configuration
screen in the BIOS (see page
When the infrared operating modes are selected, the RS232 transmitter is shutdown.
Care should be taken to ensure that the IrDA module is not installed whilst the RS232
transmitter is enabled, as this would cause a conflict between the two devices.
