Casio IT-2000D Uživatelský manuál stáhnout pdf (Strana 89)

Secondary code

Basically a system scan code is assigned to each key, however, for some keys, different codes

will be assigned depending on the Fn key.

Code Table

The following diagram shows the relationship between the keyboard keys and primary codes.

Fig. 5.3

Fn key

The Fn key is used to generate a system scan code for the function key if it is pressed together

with a numeric key. For example, Fn + 1 generates a system scan code for the F1 key, and

Fn + 0 generates a system scan code for the F10 key. However, Fn + 7 to 9 will not generate

a system scan code that corresponds to any function keys because they have already been

assigned to the following internal functions to be executed internally.

Operation Function

Fn + 7 Toggles the backlight on and off.

Fn + 8 Increases the LCD screen contrast by one increment.

Fn + 9 Decreases the LCD screen contrast by one increment.

37 38 39 2D

2E 34 35 36

30 31 32 33

Fn 7 8 9 -

4 5 6

CLR

0 1 2 3

003E 003F 0040

0044 003B 003C 003D

Fn key not pressed

Fn key pressed

1 2 ... 84 85 86 87 88 89 90 91 92 93 94 ... 223 224

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Casio IT-2000D Uživatelský manuál Strana 89