ADNS-3000 Avago Technologies US Inc., ADNS-3000 Datasheet - Page 16

• Manufacturer Part Number: ADNS-3000
• Description: Low Power Wireless LED Sensor
• Manufacturer: Avago Technologies US Inc.

Specifications of ADNS-3000

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 516-2308-5

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.
Burst mode is initiated by reading the MOTION_BURST
register (0x63). The ADNS-3000 will respond with the
contents of the DELTA_X, DELTA_Y, SQUAL, SHUT_HI,
SHUT_LO, and PIX_MAX and PIX_ACCUM registers in that
order. The burst transaction can be terminated anywhere
in the sequence after the DELTA_Y value by bringing the
NCS pin high. The default value in BURST_READ_FIRST
register (0x42) is the address of the DELTA_X register. The
address that is specified in the BURST_READ_FIRST regis-
ter can be changed to address 0x00 – 0x02 (PROD_ID –
MOTION_ST) or 0x05 – 0x08 (SQUAL – PIX_MAX).
In 12-bit motion reporting there will be an extra content
in DELTA_XY_HIGH (register 0x0c), to be read out in the
order of DELTA_X, DELTA_Y, DELTA_XY_HIGH, SQUAL,
SHUT_HI, SHUT_LO, PIX_MAX and PIX_ACCUM. The rest
of the burst mode operation is the same as 8-bit motion
reporting.
After reading the MOTION_BURST address (0x63), the
microcontroller must wait t
the continuous data bytes. 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
not available for use until it is reset with NCS, even for a
second burst transmission.
16
BEXIT
to terminate burst mode. The serial port is
SRAD
before starting to read
Reset
During power-up, the ADNS-3000 does not need a pow-
er on reset as there is an internal circuitry that performs
power on reset in the sensor. However it can be reset by
writing 0x5a to register 0x3a. A full reset will thus be ex-
ecuted and any register settings must be reloaded.
Power Down
The ADNS-3000 can be set to Power Down mode by writ-
ing 0x02 to register 0x0d to disable the sensor. In addi-
tion, the SPI port should not be accessed during power
down. Other ICs on the same SPI bus can be accessed,
as long as the sensor’s NCS pin is not asserted. The table
below shows the state of various pins during power down.
To exit Power Down, write 0x5a to register 0x3a to reset
the sensor in order to wake it up. A full reset will thus be
executed. Wait t
register settings must then be reloaded.
Notes:
1. NCS pin must be held to 1 (HIGH) if SPI bus is shared with other
2. Reading of registers should only be performed after exiting from the
Pin
MOTION
NCS
MISO
SCLK
MOSI
XY_LED
devices. It can be in either state if the sensor is the only device in
connected to the host micro-controller.
power down mode. Any read operation during power down will not
reflect the actual data of the registers.
WAKEUP
before accessing the SPI port. Any
During Power Down
Undefined
Functional
Undefined
Functional
Functional
Low current
1
2
2