IBM 3301690 user manual Serial Ports, Real Time Clock, System Monitoring, USB Interfaces

3301690 CPU Card

2.10 Serial Ports

The 3301690 CPU Board has two high-speed UART serial ports, configured as COM1 and COM2. The serial ports have the following specifications.

„16C550 UART with 16-byte FIFO buffer

„115.2Kbps transmission rate

2.11Real Time Clock

256-byte battery backed CMOS RAM

2.12 System Monitoring

The 3301690 CPU board is capable of self-monitoring various aspects of its operating status including:

„CPU, chipset, and battery voltage, +3.3V, +5V, and +12V

„RPM of cooling fans

„CPU and board temperatures (by the corresponding embedded sensors)

2.13Infrared Data Association (IrDA) Interface

The 3301690 CPU Board IrDA supports the following interfaces.

„Serial Infrared (SIR)

„Shift Keyed Infrared (ASKIR)

If you want to use the IrDA port, you have to configure SIR or ASKIR model in the BIOS under Peripheral Setup COM2. Then the normal RS-232 COM 2 will be disabled.

2.14 USB Interfaces

The 3301690 CPU Board has seven USB interfaces, six internal and one external. The USB interfaces support USB2.0. The six internal USB interfaces require USB adapter kits.

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