vt5376 STMicroelectronics, vt5376 Datasheet - Page 12

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

I2C control register map
5
Table 7.
12/24
Address
0x00
0x01
0x05
[7:0]
[7:0]
[0]
[1]
[2]
[3]
[4]
[5]
Bits
I2C control register map
I2C control register map
Device Hardware revision
Device Soft revision
Automatic Power management
Laser Selected
Use External Supply
Host Config Done
Laser Fault Detect
Led dac driven
Name
R/W
RW
RW
RO
Default
00h
00h
0h
0h
0h
0h
0h
0h
HW revision: set by the mask set
revision
FW revision: is updated every time
internal firmware of minor revision is
done.
When set, the device controls its own
power mode state machine in no
motion condition. If not set,
POWERDOWN controls the state of
the device (stdby/run)
When set, the device sets all internal
variables to optimize system for laser
illumination. Also if set, LASER_OUT
is active to direct drive a VCSEL, and
LASER_NEN controls its power
supply switch.
If not set, LASER_NEN becomes the
LED_ON signal, toggling at frame
rate.
1: The device switches its internal
1.8 V regulator off, and assumes 1.8 V
will be supplied at all time onto Vtop,
DVDD and AVDD.
0: Device uses internal regulators
(Vtop must be set > 2.2 V)
This bit must be set to 1 to indicate to
the chip that the boot configuration of
the sensor (mainly this register) is
complete, and it can start motioning.
If set to 1, and if laser is selected
(bit1), the device will undergo its own
fault detection after host_config_done
is asserted. If no fault detected, the
device will start normally. Otherwise,
the LASER_NEN signal will remain
high, and the LASER_OUT will be
inactive. In this case a power-up
sequence is required to come out of
this stdby mode.
If set to 1, and the mice is set in LED
mode, then the LED is direct driven by
the internal DAC.
Description
VT5376