PixArt Imaging Inc.
ADNS-7550 Integrated Molded Lead-Frame DIP Sensor
Delta_X_L
Address: 0x03
Access: Read
Reset Value: 0x00
Bit
7
6
5
4
3
2
1
0
Field
X
X
X
X
4
X
3
X
2
X
1
X
0
7
6
5
Data Type: Eight bit 2’s complement number.
USAGE: X movement is counts since last report. Absolute value is determined by resolution. Reading clears the
register.
-2048 -2047
-2
-1
0
+1
+2
+2046 +2047
Motion
800
801
FE
FF
00
01
02
7FE
7FF
Delta_X
NOTE: PixArt recommends that registers 0x02, 0x03, 0x04 and 0x05 be read sequentially.
Delta_Y_L
Address: 0x04
Access: Read
Reset Value: 0x00
Bit
7
6
5
4
3
2
1
0
Field
Y
Y
Y
Y
Y
Y
Y
Y
0
7
6
5
4
3
2
1
Data Type: Eight bit 2’s complement number.
USAGE: Y movement is counts since last report. Absolute value is determined by resolution. Reading clears the
register.
-2048 -2047
-2
-1
0
+1
+2
+2046 +2047
Motion
800
801
FE
FF
00
01
02
7FE
7FF
Delta_Y
NOTE: PixArt recommends that registers 0x02, 0x03, 0x04 and 0x05 be read sequentially.
Delta_XY_H
Address: 0x05
Access: Read
Reset Value: 0x00
Bit
7
6
5
4
3
2
1
0
Field
X
X
X
9
X
Y
Y
Y
Y
8
11
10
8
11
10
9
Data Type: 2’s complement number, upper 4 bits of Delta_X and Delta_Y.
USAGE: Delta_XY_H must be read after Delta_X_L and Delta_Y_L to have the full motion data. Reading clear the
registers.
NOTE: PixArt recommends that registers 0x02, 0x03, 0x04 and 0x05 be read sequentially.
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.
E-mail: fae_service@pixart.com.tw
21
PIXART [ PIXART IMAGING INC. ]
