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Glossary
PHY (Physical Layer Device)
Physical Layer Device. The name used for a transceiver in Fast Ethernet systems, which
is connected to an electronic device.
Pixel
Picture Element. The smallest controllable unit of a matrix LCD display.
RO
Read Only. Values written to RO fields cannot be read back. Writing RO fields can cause
unpredictable LH79524/LH79525 operation.
RCPC
Reset, Clock, and Power Controller. This block controls clock generation, reset function
and power allocation for low-power modes.
RMON
Remote Monitoring. A network management tool to gather information at a single point.
RTC
Real Time Clock
RW
Read or Write. RW bits or fields can be read from or written to.
SIR
Serial InfraRed
SoC
System-on-Chip. A single-chip microprocessor system directly supporting peripherals
used by an embedded-design product.
SOF
Start of Frame. The beginning of a USB-defined frame. SOF is the first transaction in each
frame. The SOF allows endpoints to identify the start of frame and synchronize internal
endpoint clocks to the host.
SSP
Synchronous Serial Port
SWI
Software Interrupt. An interrupt that can be defined by software.
TD
The USB Transfer Descriptor. A TD is a memory structure that describes information nec-
essary for the USB Host Controller to transfer a block of data to or from a client Endpoint.
20-6
Version 1.0
LH79524/LH79525 User's Guide
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