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LH75400/01/10/11 (Preliminary) User's Guide
Glossary
HBP
Horizontal Back Porch. The HBP, whose name is derived from the shape of the signal in
the time domain, is the delay between when the LCD clock is pulsed to index to a new line
and when the actual pixel data is sent to the LCD driver.
HFP
Horizontal Front Porch. The HFP, whose name is derived from the shape of the signal in
the time domain, is the delay between the end of each line, or row, of pixels before the LCD
line clock is pulsed to index to the next line.
HR-TFT
Highly Reflective Thin Film Transistor; a type of Liquid Crystal Display that relies upon
reflected light rather than transmitted light to form a display.
HRTFTC
HR-TFT LCD Timing Controller
HSW
Horizontal Synchronization Pulse Width. The HSW is the width of the pixel clock when in
passive mode, or the width of the horizontal synchronization pulse in active mode. The
required width may vary from one LCD panel to another, and the required HSW width
should be determined from the particular LCD data sheet.
IrDA
Infrared Data Association. More commonly, IrDA refers to the specification defined and
maintained by this group that is the de facto standard for wireless, infrared serial commu-
nications.
IRQ
Interrupt Request. For more information, refer to ARM Architecture Manual at the ARM Ltd.
website: www.arm.com.
ISR
Interrupt Service Routine.
k
'kilo-' prefix. 1,000 Ω = 1 kΩ.
KB
Kilobyte. A unit of measurement signifying 1,024 bytes of memory, as in 64KB of memory.
Kb
A unit of measurement representing a quantity of 1,024 bits.
Little-endian
The least significant part of the data is stored at the lowest storage address or transmitted
or received first.
7/15/03
27-3
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