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PAN3201DH Datasheet(PDF) 13 Page - Pixart Imaging Inc.

Part No. PAN3201DH
Description  LOW POWER CMOS OPTICAL MOUSE SENSOR
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Maker  PIXART [Pixart Imaging Inc.]
Homepage  http://www.pixart.com.tw
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PAN3201DH Datasheet(HTML) 13 Page - Pixart Imaging Inc.

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PixArt Imaging Inc.
PAN3201DH
CMOS Optical Mouse Sensor
All rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission
.
13
PixArt Imaging Inc.
E-mail: fae_service@pixart.com.tw
V1.0, Mar. 2006
5.2 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.
STATE 0
( 0 , 0 )
POWER ON RESET
STATE 1
( 0 , 1 )
STATE 3
( 1 , 0 )
STATE 2
( 1 , 1 )
PD
STATE
X/Y output
XA/YA XB/YB
0
1
2
3
00
0
1
1
1
10
PD
PD
PD
Figure7. State machin
5.3 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
→ STATE3) is one count.
XA/YA
XB/YB
X MOTION TO THE RIGHT
Y MOTION UP
( + DIRECTION )
STATE0
( 0 , 0 )
STATE1
( 0 , 1 )
STATE2
( 1 , 1 )
STATE3
( 1 , 0 )
+1
+1
+1
+1
MOTION COUNT
STATE3
( 1 , 0 )
STATE0
( 0 , 0 )
+1
XA/YA
XB/YB
X MOTION TO THE LEFT
Y MOTION DOWN
( - DIRECTION )
STATE0
( 0 , 0 )
STATE3
( 1 , 0 )
STATE2
( 1 , 1 )
STATE1
( 0 , 1 )
-1
-1
-1
-1
MOTION COUNT
STATE1
( 0 , 1 )
STATE0
( 0 , 0 )
-1
Figure8. Quadrature output waveform


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