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Figure 1.4 PDA Robotics
Block diagram of the Intel StrongARM SA-1110 microprocessor.

datagrams over an IP network. It is used primarily for broadcast-
ing messages over a network. In medical imaging, UDP is used to
log information from various devices to a system logging reposi-
tory. A datagram is a piece of a message transmitted over a pack-
et-switching network, and is a packet of information that con-
tains the destination address in addition to data.

• Channel 1: GPCLK/UART—This channel can be used as a general
purpose clock (GPCLK) or universal asynchronous receiver-trans-
mitter (UART). See Channel 3 for a more detailed description.

• Channel 2: Infrared Data Association (IrDA) is a group of device
manufacturers that developed a standard for transmitting data via
IR light waves. Increasingly, computers and other devices (such as
printers) come with IrDA ports. This enables you to transfer data

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