UTC UT84520

CMOS IC

QW-R502-004,A

(B) Operation:

a. All the commands in legacy mode are still valid.

b. The ID code for Read Device Type command (F2) is changed from “00” to “03”.

c. Data report is changed to four byte format:

Byte

Bit

Description

1

0

Left button status; 1 = pressed

1

Right button status; 1=pressed

2

Middle button status; 1=pressed

3

Reserve

4

X data sign; 1=negative

5

Y data sign; 1=negative

6

X data overflow; 1=overflow

7

Y data overflow; 1=overflow

2

0-7

X data (D0-D7)

3

0-7

Y data (D0-D7)

4

0-7

Z data (D0-D7)

C) Exit for Microsoft scrolling mode:

There are two ways to exit:

a. Power off

b. Reset command (FF).

(IV). Z-axis Input Function:

(a). Photo couples input: Z-axis counter accumulates the Z1, Z2 phase changed by movement.

(b). Mechanical mode: The same as optical wheel mode.

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