PAN101BOI-208 PIXART [Pixart Imaging Inc.], PAN101BOI-208 Datasheet - Page 12

• Manufacturer Part Number: PAN101BOI-208
• Description: CMOS OPTICAL NAVIGATION SENSOR
• Manufacturer: PIXART [Pixart Imaging Inc.]

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6.2 Quadrature Output State Machine
The following state machine shows the states of the quadrature output pins. The three things to note are
that state 0 is entered after a power on reset. 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. During times of mouse no
movement will entry power saving mode, until mouse was moved.
6.3 Quadrature Output Waveform
The following diagrams show the waveform of the two channel quadrature outputs. If the X, Y is
motionless, the (XA, XB), (YA, YB) will keep in final state. Each state change (ex. STATE2
is one count.
PixArt Imaging Inc.
PAN101B
XB/YB
XA/YA
XB/YB
XA/YA
Figure 10. State Machine
Figure 11. Quadrature Output Waveform
PD
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STATE1
STATE3
( 1 , 0 )
( 0 , 1 )
STATE 1
( 0 , 1 )
POWER ON RESET
+
1
1
-
STATE0
( 0 , 0 )
STATE0
( 0 , 0 )
+
1
1
-
STATE 0
( 0 , 0 )
STATE 2
( 1 , 1 )
STATE1
( 0 , 1 )
STATE3
( 1 , 0 )
PD
PD
+
1
1
-
STATE2
( 1 , 1 )
STATE2
( 1 , 1 )
STATE 3
( 1 , 0 )
+
1
1
-
STATE3
( 1 , 0 )
STATE1
( 0 , 1 )
PD
+
1
-
1
STATE
0
1
2
3
STATE0
STATE0
( 0 , 0 )
( 0 , 0 )
CMOS Optical Navigation Sensor
X MOTION TO THE LEFT
Y MOTION DOWN
( - DIRECTION )
XA/YA XB/YB
X MOTION TO THE RIGHT
Y MOTION UP
( + DIRECTION )
0
0
1
1
X/Y output
MOTION COUNT
MOTION COUNT
0
1
1
0
.
V1.4, FEB. 2003
STATE3)
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