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零件编号 | VD5377 | ||
描述 | Ultra-low power motion sensor | ||
制造商 | STMicroelectronics | ||
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1 Page
VD5377
Ultra-low power motion sensor for optical finger navigation (OFN)
Features
• Ultra-low power performance and high
speed/high accuracy motion detection (up to
28 in/s @ 4000 f/s)
• Manual or automatic power management
options
• Very low quiescent and operating current
modes for battery life saving
• Fully integrated solution: internal oscillator and
LED driver
• I2C interface with fast polling rates for high-end
applications (report rate up to 1 per ms).
• User-selectable I2C address (default I2C
address is 0xA6)
• CPI programmable up to 3,200 CPI
• Fully automatic exposure control (AEC)
Applications
• Smart phones
• Laptop/Netbook PCs
• Media players
• GPS devices
• Remote controls for home entertainment
equipment
Description
The VD5377 is an ultra-low power, single-chip
controller IC containing all the functions
necessary for optical joysticks/optical finger
navigation modules enabling improved mobile
experience and longer battery life. This device is
cost and performance optimized for Optical
Finger Navigation applications and includes
special features to ensure optimum performance
even in bright sunlight.
Datasheet - preliminary data
February 2013
Doc ID 022952 Rev 2
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
1/88
www.st.com
1
Overview
VD5377
1.1
Technical specification
Resolution
Pixel size
Array size
Frame rate
Feature
Tracking performance
Supply voltage
Operating temperature
Table 1. Technical specification
Detail
Programmable up to 3200 cpi
30.4 µm
20 x 20 pixels
Up to 4 kf/s (auto or manual)
Up to 720 mm/s (28 in/s)
low drift, high accuracy
2.2 V to 3.0 V using internal regulator or 1.8 V direct drive
-20°C to 70°C
1.2 VD5377 enhancements
The VD5377 has been optimized for optical finger navigation (OFN) applications. For
applications migrating from the previous VD5376 device, the following list highlights the key
differences:
• optimized floor plan for improved module design
• enhanced automatic power management mode: fully programmable sleep and wake-
up intervals
• ultra-low powerdown mode (<1 µA)
• user-selectable I2C addresses with the option to create custom start-up configurations
• programmable polarity on external MOTION signal
• power-on reset (POR) function gated on MOTION signal
• unique Backlight controller: three PWM controlled LED drive outputs (10 mA)
• enhanced performance in high ambient light conditions
• new filter added to aid navigation in low contrast images
• increased LED on-time for greater dynamic range
• simplified support circuit: Rbin and Cosc components now integrated
• smaller external capacitor on VREG (220 nF)
• improved I2C frame capture
8/88 Doc ID 022952 Rev 2
Application schematics
VD5377
3.2 Cursor orientation
Figure 5 shows the direction of positive motion vectors relative to silicon orientation with the
default power-up register settings: parameters_2 (0x27) = 0x08 that is, invert_x = 0,
invert_y = 0 and swap_xy = 1. An imaging lens is assumed but not shown. The direction of
X/Y motion can be reversed or swapped by writing to register 0x27 allowing preferred cursor
movement from any die orientation.
Figure 5. VD5377 default XY orientation
Pad 1
Y+
Pixel array
X+
Imaging lens not shown
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Doc ID 022952 Rev 2
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页数 | 30 页 | ||
下载 | [ VD5377.PDF 数据手册 ] |
零件编号 | 描述 | 制造商 |
VD5376 | Ultra-low power motion sensor | STMicroelectronics |
VD5377 | Ultra-low power motion sensor | STMicroelectronics |
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