Introduction:
More and more modding is the way that the hardcore computer user is going and having the most unique toys sets one apart from the rest. Crystalfontz provides toys for the modder or for the system admin who wants an easy way to monitor his hardware without having to hook up a monitor to the computer. They provide a wide variety of LCD displays for just about every application imaginable. Today we have the pleasure of reviewing the 634 LCD (CFA634-TFB-KU) with drive bay kit. It is a 4 line by 20 character display that is backlit and has the option of being connected to USB or serial connection.

Specifications:
The LCD material for the positive displays is FSTN (Film compensated Super Twisted Nematic) instead of STN. FSTN gives better contrast, faster response and makes an all-around more readable display.
The display has the ability to store a customized boot screen of your design in its EEPPROM.
All features of the display are controlled: characters displayed, users-definable characters, backlight setting, contrast setting, cursor position, cursor style, “wrap” setting, “scroll” setting, and even the scrolling marquee.
The CGROM is an enhanced version with many more useful characters: numeric superscripts, icons, mathematical symbols, some fractions, a great variety of arrows, many currency symbols, and more.
Available with 634 PC Mounting Bracket.
Large, easy to read characters: 7.3 MM (0.287”) character height.
Available with bright, even, software adjustable LED backlighting or in a low-power reflective model.
Software controlled contrast.
“Gapless” horizontal bargraphs.
Software controlled terminal style automatic scrolling and line wrapping.
Unique “Scrolling Marquee” feature continuously scrolls a message across the display without host intervention.
Buffered communication.
Large display area in a compact 130 MM X 63 MM (5.12” X 2.48”) package.
Thin:
   - Reflective is 15.9 MM (0.626”) including DB-9 connector.
   - LED Backlit is 19.9 MM (0.783”) including DB-9 connector.
The USB converter and it’s compact connector does not add to the overall thickness of the module.
Negative voltage for contrast generated on board.
Printable 1:1 Acrobat template.

The USB interface version of the 634 has the full feature set of the serial interface 634, but allows connection to a USB port—using only a single cable for both power and data. Full compatibility with existing software is preserved by the driver, and your computer will now show an additional COM port any time the display is connected.

Next Page - A Closer Look And Conclusion

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