Movectrl register – Rainbow Electronics AT77C104B User Manual

Page 17

AT77C104B

5347B–BIOM–08/04

This register adjusts the “time out” for considering the two transitions as a click.

Note:

Clickfreq and Clickcpt registers should not be changed once the click mode is selected.

Movectrl Register

Register Name:Movctrl (7 bits)

Access Type:Read/Write

Function:In stream mode, during navigation calculation, the AT77C104B must

interrupt the host when a maximum absolute X or Y movement is detected (second and
third navigation registers). The MOVECTRL register enables you to control this value.
This value can be set as the minimum finger movement value at which the pointing
device makes a displacement.

•

MOVCTRL: generates an interrupt when the second or third navigation
register (X or Y absolute movement) is greater than the value programmed in
the Movectrl register

0b0000000

0b0000001

0b0000010

...

0b1111111

For example, when MOVCTRL = 0b0001001, an interruption to the host is generated
when the absolute X movement register (second navigation register) or absolute Y
movement register (third navigation register) is greater than 0b00010010.

Note:

The Movctrl register should not be changed once the navigation mode is selected.

(MSB)

–

(LSB)