VT5363V032

VT5363 Single-chip USB/PS2 optical mouse Features ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Suitable for use with both LED and laser (VCSEL) light sources Single chip design with minimal support circuitry USB and PS2 operation Single +5 V supply No mechanical moving parts required 800 cpi resolution (400 cpi selectable) 9600 frames per second Tracking at up to 40 ips Up to 5 switch inputs and scroll wheel Possible customizing for VID, PID and descriptor string with external EEPROM Proven, high volume package technology compensates for the change in sensitivity compared to 640nm (red LED). Motion performance can be improved by increasing the current supplied to the navigation LED. A specifically designed optical system with integrated light guide and lens is available. This has been optimized for low cost, space saving and ease of mouse manufacture. No kapton tape is required in the assembly process. Applications ■ Optical USB/PS2 mouse for desktop PC, workstation and laptop Technical specifications Resolution Pixel size Array size Frame rate High Speed Motion Detector Clock Supply voltage Supply current Operating temperature Package type 800 CPI (400 selectable) 30.4 µm 20*20 pixels 9600 frames/second Accurate motion up to 40 ips 6 MHz resonator 5V direct from USB or PS2 port 15mA (typ.) (excludes LED) [0: 60] °C 7*7mm 32 lead LOQFP(1) Description The VT5363 optical tracking sensor is a complete solid state tracking engine with no moving parts. This single chip optical mouse sensor provides excellent control and precision and works on a wide range of surfaces. The VT5363 supports 2, 3 or 5 button mouse designs with a mechanical scroll wheel encoder. It contains a dual USB/PS2 interface with automatic interface selection and may be powered directly from the USB or PS2 port. A single 6MHz resonator provides all the clock requirements and a minimum of additional passive components are required. An external EEPROM may be used to implement customer specific USB configurations (PID, VID and descriptor string). The VT5363 sensor operates over a wide range of illuminant wavelengths. For devices operating at approximately 850nm (IR LED or VCSEL), the on-die automatic exposure controller (AEC) 1. LOQFP: Low profile Optical Quad Flat Pack January 2007 Rev 4 1/23 www.st.com 23 Contents VT5363 Contents 1 2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Design notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 Pin assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Reference schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Bill of materials - BOM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Scroll wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Driving the navigation LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 LNK_LED output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Optical centre . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Sensor orientation on PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3 Configuring the VT5363 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.1 3.2 3.3 3.4 3.5 3.6 Selecting USB or PS2 operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Selecting mouse configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Changing the CPI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 External EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 EEPROM data format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Application support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4 Optics assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Mouse assembly guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 5 LED selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 5.1 5.2 5.3 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Key LED parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 VCSEL and IR illumination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 6 7 2/23 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 VT5363 Contents 8 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 8.1 8.2 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 LOQFP package guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 9 10 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 3/23 Introduction VT5363 1 Introduction The VT5363 sensor is a single-chip solid state optical tracking engine with no moving parts. It allows the creation of a high performance, fully featured mouse with the minimum of external components. The device provides excellent navigation control and precision and works on a wide range of surfaces. VT5363 incorporates features that simplify product design and reduce time to market. By minimizing the number of external components, the mouse manufacturer has flexibility for layout and product design. ST has worked with optical component suppliers to produce a single piece light guide with integrated lens, and recommendations for a compatible LED. Details of the optics and LED are included in this datasheet.The main functional blocks of the VT5363 are shown in Figure 1. Figure 1. VT5363 block diagram 5V SUPPLY (USB or PS2) 5V to 3.3V regulator 3V3 to 1V8A regulator 3V3 to 1V8D regulator VT5363 AVDD Pixel Array DVDD Z-wheel USB/PS2 interface PULLUP switches Controller DN / DATA DP / CLOCK 6 MHz resonator LED control OPTIONAL EEPROM SCL SDA Optional LNK_LED TRK_LED 4/23 VT5363 Design notes 2 2.1 Design notes Pin assignment Figure 2. VT5363 pin assignment SWRIGHT SWBACK SWLEFT SWMID AGND AVDD 32 VREG33 NC NC 1 2 3 31 30 29 28 27 26 25 24 23 22 21 ZB ZA SCL SDA VDD5 X0 NC XI DVDD 4 5 6 7 8 9 10 11 VT5363 20 19 18 17 12 13 14 15 16 DGND DVDD TRK_LED LNK_LED NC DGND PULLUP DP/CLK VDD3 DVRE18 DN/DAT AVREG18 SWFOR TEST 5/23 Design notes VT5363 2.2 Pin description Table 1. Pin N° 1 4 5 7 8 9 10 11 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 VT5363 pin description Pin name VREG33 VDD5 X0 XI DVDD DGND PULLUP DN / DAT DP/ CLK VDD3 DVREG18 AVREG18 LNK_LED TRK_LED DVDD DGND SDA SCL ZA ZB SWFOR SWBACK SWMID SWLEFT SWRIGHT RESERVED AVDD AGND Type PWR PWR OSC OSC PWR PWR I/O I/O I/O PWR PWR PWR O O PWR PWR I/O I/O I/O I/O I/O I/O I/O I/O I/O I PWR PWR 3.3 V regulator output 5V supply - direct from USB or PS2 supply 6MHz resonator 6MHz resonator 1.8V digital supply Digital ground connect 1K5 resistor from here to DN/DAT DN in USB mode, DATA in PS2 mode DP in USB mode, CLOCK in PS2 mode 3.3V supply 1.8V digital regulator output - use to drive DVDD 1.8V analogue regulator output - use to drive AVDD Status LED output Navigation LED output 1.8V digital supply Digital ground I2C SDA line I2C SCL line Z-wheel input A Z-wheel input B ‘Forward’ switch input (active low) ‘Back’ switch input (active low) ‘Middle’ switch input (active low) ‘Left’ switch input (active low) ‘Right’ switch input (active low) Connect to GROUND 1.8 V analogue supply Analogue ground Comment Note: All other pins are NOT CONNECTED 6/23 VT5363 Design notes 2.3 Figure 3. Reference schematic VT5363 reference schematic 7/23 Design notes VT5363 2.4 Bill of materials - BOM Table 2. Ref. U1 X1 D1 SW1-4 SW5 Q1 C1-C4 C5-C7 R1 R4-R10 R11 Bill of materials: main components Description Optical mouse sensor 6MHz resonator Navigation LED Switches Mechanical encoder (scroll-wheel) NPN bipolar transistor (to drive D1) 4u7 tantalum capacitor 100nF ceramic capacitor 1k5 resistor 100k resistors 1k resistor Manufacturer STMicroelectronics Murata Part number VT5363V032 CSTLA6M00G55-B0 See Chapter 5: LED selection Omron Alps D2F series EC10E series Standard component - many suppliers Standard component - many suppliers Standard component - many suppliers Standard component - many suppliers Standard component - many suppliers Standard component - many suppliers Only required if EEPROM is fitted U2 R13,R14 EEPROM 10k resistors STMicroelectronics M24C01W standard component - many suppliers Additional items not mounted on the PCB Optics Assembly Aperture Stop USB/PS2 cable See STV-363-R01 Reference Design Manual See STV-363-R01 Reference Design Manual Standard component - many suppliers 2.5 Switches The VT5363 supports up to 5 switch inputs. These switches provide the standard mouse functions of LEFT, RIGHT and MIDDLE as well as the advanced functions of BACK and FORWARD. The switch inputs are all active LOW. An external pull-up resistor is required between the switch input and the 3V3 supply. 2.6 Scroll wheel The VT5363 supports the use of an external mechanical shaft encoder with quadrature outputs to act as a scroll wheel. The EC10E series from Alps are suitable. Pull-up resistors are required between the ZA and ZB outputs of the shaft encoder and the 3V3 supply. Note that the two quadrature outputs ZA and ZB are not interchangeable and must be connected correctly. 8/23 VT5363 Design notes 2.7 Driving the navigation LED The VT5363 provides an output (NAV_LED) for driving the LED used to illuminate the mousing surface. This output is active HIGH but cannot be used to drive the navigation LED directly. An external NPN bipolar transistor is recommended as shown in the reference schematic. The maximum current through the LED is controlled by a resistor (R1 on the Reference Schematic). 2.8 LNK_LED output The VT5363 has an output (LNK_LED) which is high whenever the mouse is active (i.e. connected to a PC which is not in a suspend state). The user does not need to use this output to produce a working mouse but it may be used to drive an additional LED for cosmetic purposes. An external bipolar transistor is required in the same way as the navigation LED. 2.9 Optical centre The optical centre of the VT5363 is NOT in the centre of the package, it is offset by 0.243mm in the X-axis and 0.215mm in the Y axis with respect to the centre of the package as shown below. The PCB designer must take this into account when laying out the PCB. Figure 4. VT5363 optical centre Optical centre (-0.243mm, +0.215mm) pin 1 marking mechanical centre of package (0,0) TOP VIEW OF VT5363 9/23 Design notes VT5363 2.10 Sensor orientation on PCB The VT5363 must be orientated correctly on the PCB in order to move the cursor in the correct directions when the mouse is moved. This is shown in Figure 5. Figure 5. VT5363 orientation UP pin 1 marking LEFT RIGHT VT5363 mounted UNDERNEATH TOP VIEW of PCB DOWN 10/23 VT5363 Configuring the VT5363 3 3.1 Configuring the VT5363 Selecting USB or PS2 operation The selection of USB or PS2 interface is performed [automatically] by the VT5363 including a USB pull-up resistor connected between Pin No. 10 and the DN/DAT line. 3.2 Selecting mouse configuration The VT5363 may be configured to be one of three different types of mouse. ● ● ● 2 button mouse 3 button mouse with scroll wheel 5 button mouse with scroll wheel The configuration is achieved by connecting the unused switch inputs to the LNK_LED output (pin 17). All configurations will report a USB Vendor Identity (VID) of 0x0553 (ST Microelectronics Imaging Division). The three different configurations will result in 3 different USB Product Identities (PIDs) and descriptor strings as described in Table 3. Table 3. Mode 2 button Configuration selection Inputs tied to LNK_LED SWBACK, SWFOR, SWMID VID 0x0553 0x0553 0x0553 PID 0x0A00 0x0A01 0x0A02 USB descriptor string ‘2 button optical mouse’ ‘3 button optical mouse with scroll wheel’ ‘5 button optical mouse with scroll wheel’ 3 button + Z SWBACK, SWFOR 5 button + Z none A user who wishes to use their own PID, VID and descriptor string may use an external serial EEPROM to hold this information. 3.3 Changing the CPI The default CPI ‘Counts Per Inch’ of the VT5363 is 800CPI, this can easily be toggled between 800/400CPI by the user, by simply holding down the left and right buttons till LNK_LED goes off. If the PC is shutdown or the mouse unplugged it will return to the default (800 CPI). 3.4 External EEPROM The VT5363 supports the use of an external 128 byte serial EEPROM for holding customer specific information. EEPROM such as the M24C01W from STMicroelectronics are suitable. The EEPROM must be connected to the SDA and SCL pins of the VT5363. If no EEPROM is used then these lines should be tied to ground.The EEPROM cannot be programmed by the VT5363 itself and must be pre-programmed before being fitted to the final PCB. 11/23 Configuring the VT5363 VT5363 3.5 EEPROM data format A 128 byte serial EEPROM is used to hold USB configuration information. The lower 64 bytes hold USB PID, VID and string information as shown in the table below. The upper bytes may be used to hold special setup information, for example to set the resolution to 400cpi (contact STMicroelectronics for details). Location 127 in the EEPROM must hold the number 0xAA and is used to detect that an EEPROM has been fitted. If location 127 does not contain 0xAA the EEPROM contents will be ignored. Table 4. EEPROM Location 0 1 2 3 4 5 6 7 8 9 10 11 12 Example EEPROM contents Contains VID (LSB) VID (MSB) PID (LSB) PID (MSB) PID (LSB) PID (MSB) PID (LSB) PID (MSB) 0x04 0x03 0x09 0x04 0x0C Language ID Length Language ID Type Language ID (2 bytes) (0x0904 = US English) String ID Length = (number of characters in string *2) + 2 For the example string ‘MOUSE’ this is (2*5)+2 = 12 = 0x0C Product ID for ‘5 button + Z’ mouse Product ID for ‘3 button + Z’ mouse Vendor ID (only one VID is stored for all 3 mouse configurations) Product ID for 2 button mouse Notes 13 14 15 16 17 18 19 - 62 64-126 0x03 0x4D 0x4F 0x55 0x53 0x45 0xFF 0xFF String ID Type ASCII code for first character of String (example for ‘M’) ASCII code for first character of String (example for ‘O’) ASCII code for first character of String (example for ‘U’) ASCII code for first character of String (example for ‘S’) ASCII code for first character of String (example for ‘E’) Rest of lower half of EEPROM is available for longer strings, up to 50 characters maximum (set unused locations to 0xFF) Leave upper half of EEPROM empty (may be used to hold special setup information - contact STMicroelectronics for details) 127 0xAA Special flag to indicate that EEPROM is present 12/23 VT5363 Configuring the VT5363 3.6 Application support The user manual for the STV-363-R01 reference design board includes additional information and application support. Figure 6. STV-363-R01 - USB/PS2 mouse reference design board 13/23 Optics assembly VT5363 4 Optics assembly The optics assembly is shown in Figure 7 and Figure 8. Figure 7. MaxEmil optics 14/23 VT5363 Figure 8. 1 2 RevNo Revision note ECN No. Date Checked 3 6 4 5 7 8 Exploded View A PCB A B Sensor Package B LED Aperture C C Lens and Light Guide D Mouse Base 2D assembly drawing of VT5363 (exploded view) D E E Tolerances, unless otherwise stated Interpret drawing per BS308, 3RD Angle Projection Material Sig. All dimensions in mm Finish Date All dimensions in mm Do Not Scale Scale ST Confidential F This drawing is the property of STMicroelectronics and will not be copied or loaned without the written permission of STMicroelectronics. F STMicroelectronics Home, Personal Communication Sector- Imaging Division Linear 0 Place Decimals 0 ±1.0 1 Place Decimals 0.0 ±0.10 2 Place Decimals 0.00 ±0.07 Angular ±0.25 degrees Diameter +0.10/-0.00 Position 0.10 Surface Finish 1.6 microns Drawn Checked Appd. Mech. Appd. Elect. Appd. Prod. Appd. Q.A. Part No. Title Sheet Optics assembly 1 2 3 6 7 8 4 of 4 15/23 Optics assembly VT5363 Mouse assembly guidelines 1. 2. 3. Attach the sensor and all other electrical components onto PCB with the exception of the navigation LED. Form the LED leads and insert the LED into the optical assembly. Fit the optics with aperture to the PCB using the guideposts and feed the navigation LED leads through their openings. Take care to keep contamination off the sensor surface. The aperture should self-align to the VT5363 package. Route the USB/PS2 lead through the base plate then fit the base plate. Solder the navigation LED leads and trim. Add mouse top case and feet. 4. 5. 6. Note: For more details on the optics (including manufacturers), please refer to the STV-363-R01 user manual. 16/23 VT5363 LED selection 5 5.1 LED selection Overview There are a number of LEDs from a range of suppliers which will work well with the VT5363. It is the responsibility of the customer to ensure that the chosen LED works in their specific implementation. There are various price/performance trade-offs which may be made if the customer chooses to do so. 5.2 Key LED parameters The VT5363 system requires a bright visible RED LED in a standard 5mm (T1 3/4) package. The ideal viewing angle is 20o and the intensity should be at least 900mcd at a forward current of 20 mA. The key LED parameters are listed in Table 5. Table 5. Key LED parameters Parameter Diameter Length Material Luminous Intensity (@20mA) Viewing Angle Mechanical accuracy Color Wavelength Relative illumination at sensor plane for a circle of 1.1 mm diameter Recommended Value 5mm 8.6mm AlInGaP 900mcd 20o +/- 2o Red 640nm +/- 50nm 80% Notes Important for fit with lens Important for fit with lens For long-term reliability Minimum value Half intensity Accuracy of the die positioning within the LED body Illumination value required for Red/IR LED and VCSEL 5.3 VCSEL and IR illumination The VT5363 sensor will operate over a wide range of illuminant wavelengths. For devices operating at approximately 850 nm (IR LED or VCSEL), the on-die automatic exposure controller (AEC) will compensate for the change in sensitivity compared to 640nm (red LED). Navigation performance may be improved by increasing the illuminated device drive. approx. 17/23 Electrical characteristics VT5363 6 Electrical characteristics Table 6. Symbol Vin T Typical operating conditions Parameter Supply voltage Supply current (active) Supply current (suspend) Min. 4.1 Typ. 5 17 45 Max. 5.6 23.3 100 Unit V mA µA 18/23 VT5363 Typical performance characteristics 7 Typical performance characteristics Figure 9 shows the typical performance of the VT5363 sensor. Figure 9. Typical resolution versus height Typical Resolution vs Z Height 500.00 450.00 White Card 400.00 CPI 350.00 300.00 250.00 -1.00 -0.80 -0.60 -0.40 -0.20 0.00 0.20 0.40 0.60 0.80 1.00 Z Height distance from nominal (mm) Black Matt US Manila Note: Z = distance from lens to surface 19/23 Package information VT5363 8 8.1 Package information Package mechanical data Figure 10. LQFP32 clear resin body 7.0 x 7.0 x 1.40 foot print 1.0 20/23 VT5363 Table 7. LQFP dimensions (mm) Min. (mm) Typ. (mm) Package information Reference A A1 A2 B c D D1 D3 e E E1 E3 L L1 k W1 W2 Max. (mm) 1.600 0.050 1.350 0.300 0.090 9.00 7.000 5.600 0.800 9.000 7.000 5.600 0.450 0.600 1.000 0d 3.5d 5.000 0.065 1.400 0.370 0.15 1.450 0.450 0.200 0.750 7d Note: 1 2 3 Surface finish W1 is 0.07 Ra. Ejectors are on 5.2 mm square for both top and bottom package. On top package, only the identification for pin one is not an engraved ejector. 8.2 LOQFP package guidelines The IC can be exposed a maximum of 2 times to an IR/Convection reflow solder process having a temperature profile peak of no higher than 240° C. The package/chip are lead free and is ROHS compliant. 21/23 Ordering information VT5363 9 Ordering information Table 8: Order codes Part Number VT5363V032 Description USB/PS2 optical mouse sensor 10 Revision history Table 9. Date 13-Feb-2006 18-Apr-2006 Document revision history Revision 1 2 Initial release. Updates in the document format. No changes in the content. Added suitability for use with both LED and laser light sources on cover page (features and description). Changes 19-Dec-2006 3 Section 5.2: Key LED parameters - Added ‘Relative illumination’ parameter in Table 5: Key LED parameters. Replaced Figure 7: MaxEmil optics. Move the order codes to Chapter 9. 24-Jan-2007 4 Changed the document status to datasheet. 22/23 VT5363 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. 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