ADNB-7052-EV Avago Technologies US Inc., ADNB-7052-EV Datasheet - Page 18

• Manufacturer Part Number: ADNB-7052-EV
• Description: OPTICAL MOUSE EVALUATION KIT
• Manufacturer: Avago Technologies US Inc.
• Series: LaserStream™r
• Type: Optical Mouser

Specifications of ADNB-7052-EV

• Contents: Mouse Sensor, VCSEL, Lens, Laser Assembly Clip and Documentation
• Description/function: Laser Mouse Bundle
• Interface Type: SPI
• Product: Display Modules
• Touch Panel: No Touch Panel
• For Use With/related Products: ADNS-7050
• Lead Free Status / Rohs Status: Details
• Other names: Q2656643; Q2755626

SCLK
SCLK
During a read operation SCLK should be delayed at least
t
ADNS-7050 has time to prepare the requested data. The
falling edge of SCLK for the first address bit of either the
read or write command must be at least t
the last SCLK rising edge of the last data bit of the previ-
ous read operation.
Burst Mode Operation
Burst mode is a special serial port operation mode that
may be used to reduce the serial transaction time for a
motion read. The speed improvement is achieved by con-
tinuous data clocking to or from multiple registers with-
out the need to specify the register address, and by not
requiring the normal delay period between data bytes.
18
If the rising edge of the SCLK for the last data bit of the
second write command occurs before the required delay
(t
correctly.
Figure 19. Timing between write and read commands.
Figure 20. Timing between read and either write or subsequent read commands.
SCLK
Figure 21. Motion burst timing.
SRAD
SWW
MOTION_BURST REGISTER ADDRESS
), then the first write command may not complete
after the last address data bit to ensure that the
ADDRESS
ADDRESS
WRITE OPERATION
FIRST READ OPERATION
DATA
READ FIRST BYTE
t
SRAD
READ OPERATION
SRR
t
SRAD
or t
SRW
READ SECOND BYTE
after
If the rising edge of SCLK for the last address bit of the
read command occurs before the required delay (t
the write command may not complete correctly.
Burst mode is activated by reading the Motion_Burst
register. The ADNS-7050 will respond with the contents
of the Motion, Delta_X, Delta_Y, SQUAL, Shutter_Upper,
Shutter_Lower, and Maximum_Pixel registers in that or-
der. The burst transaction can be terminated anywhere
in the sequence after the Delta_X value by bringing the
NCS pin high. After sending the register address, the mi-
cro-controller must wait t
data. All data bits can be read with no delay between
bytes by driving SCLK at the normal rate. The data are
latched into the output buffer after the last address bit
is received. After the burst transmission is complete, the
micro-controller must raise the NCS line for at least t
to terminate burst mode. The serial port is not available
for use until it is reset with NCS, even for a second burst
transmission.
t
SWR
NEXT READ OPERATION
READ THIRD BYTE
DATA
ADDRESS
t
SRW
or WRITE OPERATION
• • •
& t
SRR
SRAD
NEXT READ
• • •
ADDRESS
• • •
• • •
and then begin reading
• • •
• • •
SWR
BEXIT
),