vt5376 STMicroelectronics, vt5376 Datasheet - Page 13

• Manufacturer Part Number: vt5376
• Description: Ultra-low Power Laser Motion Sensor For Laser Mouse Applications
• Manufacturer: STMicroelectronics

VT5376
Table 7.
Address
0x0A
0x0D
0x21
0x22
0x29
0x2A
[7]
[6:0]
[7]
[6:0]
[7:0]
[7:0]
[7:0]
[7:0]
Bits
I2C control register map (continued)
Force LaserOUT ON
DAC current setting
Force LaserOUT ON (Compl)
DAC current setting (Compl)
X_motion
Y_motion
Min_features[13:6]
Scaling for X motion vectors
Name
R/W
RW
RW
RW
RW
RO
RO
0000_0100
0001_0000
Default
7Fh
00h
0h
1h
If set to 1, this sets the LASER_OUT
DAC always ON (instead of toggling
normally). This mode is provided in
case the DAC current needs
calibrating. To confirm this mode,
register 0x0D will also need to be
written to (complement data).
Sets DAC current setting. To validate
the setting, register 0x0D will also
need to be written to (complement
data).
0x7F: 3.4 mA
0x00: 10 mA
If set to 0, this sets the LASER_OUT
DAC always ON (instead of toggling
normally). This mode is provided in
case the DAC current needs
calibrating. To confirm this mode,
register 0x0A will also need to be
written to (complement data).
Sets DAC current setting. To validate
the setting, register 0x0A will also
need to be written to (complement
data).
0x00: 3.4mA
0x7F: 10mA
This register holds the overall X
movement data since last polling was
done.
Value is 8 bit 2’s complement.
This register holds the overall Y
movement data since last polling was
done.
Value is 8 bit 2’s complement.
This register represents the feature
threshold below which motion is no
longer valid (in this case, the device
reports “0” motion). This is linked to
the value reported in registers
0x31/0x32
Sets resolution as CPI:
8: 400 CPI
16: 800 CPI
Assuming lens magnification of x0.5
I2C control register map
Description
(1)
(1)
13/24