vt5376 STMicroelectronics, vt5376 Datasheet - Page 14

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

I2C control register map
Table 7.
1.
14/24
Address
0x2B
0x31
0x32
0x47
0x4F
0x61
0x62
Internal ACCUMULATOR is reduced from this value every time it is read.
[7:0]
[15:8]
[7:0]
[7:0]
[7:0]
[7:0]
[0]
[2]
[3]
Bits
I2C control register map (continued)
Scaling for Y motion vectors
Features count
Vbat converted data
Exp max value
IMAGE[7:0]
Enable image dump mode
Image ready for download
Image upload complete
Name
R/W
RW
RW
RO
RO
RO
RO
RO
0001_0000
Default
0
0
o
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 possess, for the motion
detection machine to operate reliably.
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, and ADC step are 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.
This register contains the pixel value
when image dump feature has been
activated (with reg 0x62, bit 0).
To read the 400 pixels from the
captured frame, the register must be
read 400 consecutive times,
If set to 1, the device will capture a
single frame. When the frame is
captured and ready to be downloaded
via reg 0x60, bit 4 (image ready) is
set.
This bit is asserted when the captured
image is ready to be downloaded via
reg 0x60 read.
When image download is complete,
bit 3 and bit 4 are reset
This flag is set when all 400 pixels
have been read by I2C host.
Description
VT5376