AT77C105A [Preliminary]
Two transitions are interpreted as a click if the number of slices between them is less
than CLICKCPT. This is used to differentiate a touch-down/touch-up from a real click. A
click is equivalent to two close touch-down/touch-up transitions.
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 AT77C105A 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.
b6
(MSB)
0
b5
–
b4
–
b3
–
b2
–
b1
–
b0
(LSB)
0
0
0
0
0
0
•
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.
19
5419A–BIOM–01/05
ATMEL [ ATMEL ]
