adns-6030 Avago Technologies, adns-6030 Datasheet - Page 16

• Manufacturer Part Number: adns-6030
• Description: Low Power Laser Mouse Bundles - Agilent Hewlett-packard
• Manufacturer: Avago Technologies

Power management modes
The ADNS-6030 has three
power-saving modes. Each
mode has a different motion
detection period, affecting
response time to mouse motion
(Response Time). The sensor
automatically changes to the
appropriate mode, depending
on the time since the last
reported motion (Downshift
Time). The parameters of each
mode are shown in the
following table.
Motion Pin Timing
The motion pin is a level-
sensitive output that signals the
micro-controller when motion
has occurred. The motion pin
is lowered whenever the
motion bit is set; in other
words, whenever there is data
in the Delta_X or Delta_Y
registers. Clearing the motion
bit (by reading Delta_X and
Delta_Y, or writing to the
Motion register) will put the
motion pin high.
LASER Mode
For power savings, the VCSEL
will not be continuously on.
ADNS-6030 will flash the
VCSEL only when needed.
16
Mode
Rest 1
Rest 2
Rest 3
Response
(nominal)
164ms
Time
33ms
840ms
(nominal)
Downshift
237ms
8.4s
504s
Time
Synchronous Serial Port
The synchronous serial port is
used to set and read
parameters in the ADNS-6030,
and to read out the motion
information.
The port is a four-wire port.
The host micro-controller
always initiates communication;
the ADNS-6030 never initiates
data transfers. SCLK, MOSI,
and NCS may be driven
directly by a micro-controller.
The port pins may be shared
with other SPI slave devices.
When the NCS pin is high, the
inputs are ignored and the
output is tri-stated.
The lines that comprise the
SPI port:
SCLK: Clock input. It is
always generated by the
master (the micro-controller).
MOSI: Input data. (Master
Out/Slave In)
MISO: Output data. (Master
In/Slave Out)
NCS:
(active low). NCS needs to be
low to activate the serial port;
otherwise, MISO will be high Z,
and MOSI & SCLK will be
ignored. NCS can also be
used to reset the serial port in
case of an error.
Chip select input
Chip Select Operation
The serial port is activated
after NCS goes low. If NCS is
raised during a transaction,
the entire transaction is
aborted and the serial port
will be reset. This is true for
all transactions. After a
transaction is aborted, the
normal address-to-data or
transaction-to-transaction
delay is still required before
beginning the next transaction.
To improve communication
reliability, all serial
transactions should be framed
by NCS. In other words, the
port should not remain
enabled during periods of non-
use because ESD and EFT/B
events could be interpreted as
serial communication and put
the chip into an unknown
state. In addition, NCS must
be raised after each burst-
mode transaction is complete
to terminate burst-mode. The
port is not available for
further use until burst-mode is
terminated.