Casio IT-2000W manual Secondary code, Code Table, Fn key

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.

	37	38	39	2D
2E	34	35	36	1B
30	31	32	33	0D

Fn￿	7	8	9	-	Fn key not pressed
	4	5	6	CLR
0	1	2	3

003E 003F 0040

0044 003B 003C 003D Fn key pressed

Fig. 6.3

Fn key

The Fn key is used to generate a system scanning code for the function key if it is pressed together with a numeric key. For example, Fn+1 keys generate a system scanning code for the F1 key, and Fn+0 keys generate a system scan code for the F10 key. However, Fn+7 to 9 keys will not generate a system scanning 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.

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