ADNS-7530 Avago Technologies US Inc., ADNS-7530 Datasheet - Page 16

• Manufacturer Part Number: ADNS-7530
• Description: Optical Mouse Sensor,DIP
• Manufacturer: Avago Technologies US Inc.

Specifications of ADNS-7530

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 13. Forward oltage vs. Forward urrent for S
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.
For power savings, the VCSEL will not be continuously on.
ADNS-7530 will flash the VCSEL only when needed.
Synchronous Serial Port
The synchronous serial port is used to set and read pa-
rameters in the ADNS-7530, and to read out the motion
information. The port is a four-wire port.
micro-controller always initiates communication; the
ADNS-7530 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:
MOSI:
MISO:
NCS:
16
AS
S ’s Typical haracteristics
2.5
2.0
1.5
1.0
0.5
0.0
Mode
0
Clock input. It is always generated by the master
(the micro-controller).
Input data. (Master Out/Slave In)
Output data. (Master In/Slave Out)
Chip select input (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.
V = C
2
Forward Current, I
4
V = A,V
6
F
(mA)
8
The host
10
Figure 1 . Junction Temperature ise vs. Forward urrent for S
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 transac-
tions 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.
hip Select Operation
50
40
30
20
10
0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Forward Current, I
V = C
F
(mA)
V = A,V