STV-376-E01 STMICROELECTRONICS [STMicroelectronics], STV-376-E01 Datasheet - Page 15

• Manufacturer Part Number: STV-376-E01
• Description: Ultra-low power laser motion sensor for laser mouse applications
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

VT5376
Table 7.
Address
0x2A
0x2B
0x27
0x29
0x31
0x32
0x41
0x43
0x47
0x4F
[15:8]
Bits
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[0]
[1]
[3]
[5]
[7]
[4]
I2C control register map (continued)
Invert X
Invert Y
Swap XY
Test Pattern Enabled
Test Pattern Speed
Min_features[13:6]
Scaling for X motion vectors
Scaling for Y motion vectors
Features count
Exposure [8:1]
Auto Expo En
Vbat converted data
Exp max value
Name
R/W
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RO
RO
RO
RO
0000_0100
0001_0000
0001_0000
Default
80h
1h
0h
0h
1h
0h
0h
Allows X to be inverted
Allows Y to be inverted
Replaces X with Y and Y with X
0: Normal mode
1: Diamond shape pattern
Diamond test pattern speed -
0x0 : motion = 127 max speed
0x1 : motion = 64
0x2 : motion = 32
0x3 : motion = 16
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threshold below which motion is no
longer valid (in this case, the device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
Sets resolution as CPI:
0x08: 400 CPI
0x10: 800 CPI
Assuming lens magnification of x 0.5
Feature count report: the higher the
value, the more distinctive features the
surface requires, for the motion
detection machine to operate reliably.
Exposure value in 2 x CLK12 period
units
Auto exposure enable
This register holds the current
converted data from the Vbat input
voltage.
The data range is as follows:
0000_0000: Vbat = 0.6 V
1111_1111: Vbat = 1.6 V
The response is linear for each value
in between. ADC step: 1V/256 =
3.9mV
This registers holds the maximum
pixel value (before CDS) for the
current frame. It shows if some pixels
are saturated or not.
I2C control register map
Description
(2)
(2)
15/30