ADNS-2030 Avago Technologies US Inc., ADNS-2030 Datasheet - Page 14

• Manufacturer Part Number: ADNS-2030
• Description: Optical Mouse Sensor,DIP
• Manufacturer: Avago Technologies US Inc.

Specifications of ADNS-2030

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Quadrature State Machine
The following state machine shows the states of the
quadrature pins. The two things to note are that while the
PD pin is asserted, the state machine is halted. Once PD is
de-asserted, the state machine picks up from where it left
off. State 0 is entered after a power up reset.
Figure 18. Quadrature state machine.
Quadrature Output Waveform
The two channel quadrature outputs are 3.3 volt CMOS
outputs. The ∆x count is used to generate the XA and XB
signals, and ∆y count is used for the YA and YB signals.
Figure 19. Quadrature output waveform.
1
XA
XB
XA
XB
PD
PD
STATE 0
STATE 1
-1
+1
+1
+1
-1
-1
-1
+1
STATE 2
STATE 3
-1
+1
PD
PD
-1
+1
STATE
0
1
2
3
LEFT MOTION
(Ð DIRECTION)
MOTION COUNT
RIGHT MOTION
(+ DIRECTION)
MOTION COUNT
OUTPUT
A
X and Y
0
0
1
1
B
0
1
0
1
YA
YB
YA
YB
-1
+1
-1
+1
-1
+1
-1
+1
DOWN MOTION
(Ð DIRECT ION)
MOTION COUNT
UP MOTION
(+ DIRECTION)
MOTION COUNT