PixArt Imaging Inc.
ADNS-3090 High-Performance Optical Mouse Sensor
The pixel output order as related to the surface is shown below.
Cable
Top Xray View of Mouse
Positive Y
LB
RB
Positive X
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
expanded view of the
surface as viewed
through the lens
last output
899 898 897 896 895 894 893 892 891 890 889 888 887 886 885 884 883 882 881 880 879 878 877 876 875 874 873 872 871 870
869 868 867 866 865 864 863 862 861 860 859 858 857 856 855 854 853 852 851 850 849 848 847 846 845 844 843 842 841 840
~
~
~
839 838
etc.
~
~
~
61 60
59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30
29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
first output
Figure 25. Pixel address map (surface referenced)
Error detection and recovery
1. TheADNS-3090andthemicro-controllermightgetout
of synchronization due to ESD events, power supply
droops or micro-controller firmware flaws. In such a
case, the micro-controller should pulse NCS high for
at least 1 ms. The ADNS-3090 will reset the serial port
(but not the control registers) and will be prepared for
the beginning of a new transmission after the normal
transaction delay.
4. The micro-controller can verify success of write opera-
tions by issuing a read command to the same address
and comparing written data to read data.
5. The micro-controller can verify the synchronization of
the serial port by periodically reading the product ID
and inverse product ID registers.
6. The microcontroller can read the SROM_ID register to
verify that the sensor is running downloaded SROM
code. ESD or similar noise events may cause the sensor
to revert to native ROM execution. If this should hap-
pen, pulse RESET and reload the SROM instructions.
2. Invalid addresses: Writing to an invalid address will
have no effect. Reading from an invalid address will
return all zeros.
3. Termination of a transmission by the micro-controller
may sometimes be required (for example, due to a
USB suspend interrupt during a read operation). To
accomplish this the micro-controller should raise NCS.
The ADNS-3090 will not write to any register and will
reset the serial port (but not the control registers) and
be prepared for the beginning of future transmissions
after NCS goes low. The normal delays between reads
or writes (t
, t , t
, t
) are still required
SWW swr SRAD SRAD-mot
after aborted transmissions.
All rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission.
PixArt Imaging Inc.
21
E-mail: fae_service@pixart.com.tw
PIXART [ PIXART IMAGING INC. ]
