PixArt Imaging Inc.
PAN101B
CMOS Optical Navigation Sensor
6. Quadrature Mode
The quadrature state of the PAN101B tells mouse controller which direction the mouse is moving in. The
output format is two channels quadrature (X and Y direction), which emulates encoder phototransistors.
The DSP generates the ꢀx and ꢀy relative displacement values that are converted into two channel
quadrature signals. PAN101B support 400cpi, 800cpi, two types of resolution. The following diagrams
show the timing for positive X motion, to the right or positive Y motion, up.
6.1 Quadrature Output Timing
X motion to the right
Y motion up
XA/YA
83.3us
83.3us
83.3us
83.3us
83.3us
83.3us
FOUR
THREE
TWO
XB/YB
XA/YA
83.3us
166.7us
XB/YB
XA/YA
250us
XB/YB
XA/YA
333.3us
ONE
XB/YB
333.3us @ 3000frames/second
Figure 9. Quadrature Output Timing
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PixArt Imaging Inc.
E-mail: fae_service@pixart.com.tw
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V1.4, FEB. 2003