ADNS-2051 Avago Technologies US Inc., ADNS-2051 Datasheet - Page 12

• Manufacturer Part Number: ADNS-2051
• Description: Optical Mouse Sensor,DIP
• Manufacturer: Avago Technologies US Inc.

Specifications of ADNS-2051

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q2072083C

CURRENT
12
PD Pin Timing
PD
Figure 12. PD timing normal mode
Figure 13. PD timing sleep mode
Figure 15. Detail of PD falling edge timing
Quadrature Mode Timing
The output waveforms emulate the output from
encoders. 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
I
PD
I
SCLK
DD
LED
SCLK
LED
PD
OSCILLATOR
250 μs
START
t
READ OPERATION
pd
REGISTER
705 μs
COUNT
RESET
455 μs
INITIALIZATION
OPTIONAL SPI TRANSACTIONS
WITH OLD IMAGE DATA
705 μs
t
COMPUTE
t
COMPUTE
75 FRAMES
t
pupd
(SEE FIGURE 15)
2410 μs
NEW ACQUISITION
next frame. The following diagrams (see Figures 16, 17,
and 18) 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.
t
COMPUTE
AT DEFAULT FRAME RATE
SPI TRANSACTIONS
WITH NEW IMAGE DATA
PD
Figure 14. PD minimum pulse width
(POWER DOWN)
700 μs
t
PDW