ADNS-2030 데이터 시트보기 (PDF) - Avago Technologies

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ADNS-2030

Low Power Optical Mouse Sensor

Avago Technologies 

Quadrature Mode Timing

The output waveforms emulate the output from encod-

ers. With the resolution set to 400 cpi, from one to five

quadrature states can exist within one frame time. The

minimum state time is 133 µs. If the resolution is 800 cpi,

then up to ten quadrature states can exist within a frame

time. If the motion within a frame is greater than these

values, the extra motion will be reported in the next frame.

The following diagrams (see Figures 15, 16 and 17) show

the timing for positive X motion, to the right, or positive Y

motion, up. If a power down via the PD pin occurs during

a transfer, the transfer will resume after PD is de-asserted.

The timing for that quadrature state will be increased by

the length of the PD time.

X motion to the right

Y motion up

FIVE OR MORE

XA / YA

XB / YB

133 � s

133 � s

133 � s

133 � s

133 � s

FOUR

XA / YA

XB / YB

133 � s

133 � s

133 � s

267 � s

THREE

XA / YA

XB / YB

133 � s

133 � s

400 � s

TWO

XA / YA

XB / YB

133 � s

533 � s

XA / YA

ONE

XB / YB

Figure 15. Quadrature states per frame (400 cpi mode).

667 � s

~667 � s @ 1500 frames/second

One Frame

11

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