PixArt Imaging Inc.
ADBS-A350 Optical Finger Navigation
Delta_X
Access: Read
Address: 0x03
Reset Value: Any
7
6
5
4
3
2
1
0
Bit
Y7
Y6
Y5
Y4
Y3
Y2
Y1
Y0
Field
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.
Motion
-127
-2
-1
0
+1
+2
+126
+127
81
FE
FF
00
01
02
7E
7F
Delta_X
NOTES: PixArt RECOMMENDS that registers 0x03 and 0x04 be read sequentially.
Delta_Y
Access: Read
Address: 0x04
Reset Value: Any
7
6
5
4
3
2
1
0
Bit
X7
X6
X5
X4
X3
X2
X1
X0
Field
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.
Motion
-127
-2
-1
0
+1
+2
+126
+127
81
FE
FF
00
01
02
7E
7F
Delta_X
NOTES: PixArt RECOMMENDS that registers 0x03 and 0x04 be read sequentially.
SQUAL
Access: Read
Address: 0x05
Reset Value: Any
7
6
5
4
3
2
1
0
Bit
SQ7
SQ6
SQ5
SQ4
SQ3
SQ2
SQ1
SQ0
Field
Data Type: Upper 8 bits of a 9-bit unsigned integer.
USAGE: SQUAL (Surface Quality) is a measure of the number of valid features visible by the sensor in the current frame.
The maximum SQUAL register value is 167. Since small changes in the current frame can result in changes in
SQUAL, variations in SQUAL when looking at a surface are expected.
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
30
PIXART [ PIXART IMAGING INC. ]
