Multifunctional Keypad

General Features and Characteristics

ITEM NO.	KEY NAME

1ALPHA()

2ALPHANUMERIC

3ARROW

ESC

5SCAN

6ENTER

8FUNCTION(FN)

9POWER

Figure 3.Keypad Features

DESCRIPTION

The toggle key for Alphabet/Numeral input.

When the system is in alpha-mode, a small icon will be shown in the lower right corner of the display. Each numeric key can be used to generate one of the three capital letters located on that number key. For example, numeral 2 can be used to produce A, B, or C. Pressing the same key twice within one second, will produce the letter B. Pressing the same key without halting longer than one second, will allow the user to toggle through the three letters. When the key has been depressed for longer than one second or another key has been pressed, the unit will send the real key code to the application program.

Alphanumeric These 10 keys can be used for either alpha characters or numerical input. (See Item 8 for further description of key operation)

Arrow.The two arrow keys located below the Scan key are used to toggle up and down between menu selections.

Escape. This key is used to stop and exit current operation

Scan a bar code. Pressing this button will trigger the scanner to read a bar code

Enter. There are two enter keys on the side of the scan key. Normally the enter keys are used for command execution or input confirmation.

Back Space This key can be used to toggle back one space or if pressed down longer than one second, a clear code will be sent

The function key.

This key cannot be activated alone; it must be pressed with one of the numeric keys at the same time. For example, FN + 1 generates function #1, FN + 2 generates function #2, etc (up to 9 functions). Also, this key can be combined with the UP/DOWN arrow keys to adjust the contrast of the LCD. And when this key is combined with the ENTER key, it will turn ON/OFF the backlight.

Power On/Off. To prevent an accidental power down, it requires about 1.5 sec of continuous pressing to turn On/Off the power.