Rainbow-electronics AT77C105A Bedienungsanleitung PDF herunterladen (Seite 21)

AT77C105A [Preliminary]

5419A–BIOM–01/05

Note: In the PS/2 protocol, bits b2 and b1 are used to code the middle and right buttons

respectively, and b3 is set to high.

Absolute X Movement Register (0 to 255 Pixels)

Absolute Y Movement Register (0 to 255 Pixels)

Note: When a click is detected, the information is placed in the b7 bit of the status register and

in the b1 bit of the general navigation register. The reading of the status register initial-

izes the b7 bit but does not initialize the b1 bit of the general navigation register. The host

must carefully correlate the two bits.

b7 b6 b5 b4 b3 b2 b1 b0

XMOV (MSB)––––––XMOV (LSB)

00000000

b7 b6 b5 b4 b3 b2 b1 b0

YMOV (MSB)––––––YMOV (LSB)

00000000

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Rainbow-electronics AT77C105A Bedienungsanleitung Seite 21