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PixiPointTM Z UR7HCPXZ-P440 Advanced "Click-to-Select" TM No-Drift PS/2 Force Stick Controller
HID & SYSTEM MANAGEMENT PRODUCTS, MOUSECODERTM FAMILY DESCRIPTION The PixiPointTM Z mouse encoder is a cost-effective, highfunctionality IC designed to interface the CTS 106, 108 and 109 sensors to the PS/2 port. Ideal for laptop/palmtop use, the low power PixiPointTM Z offers an advanced algorithm for enhanced motion control. The IC also enables click, double-click, MouseWheel action and slow drag without the need for special drivers. The IC provides an extra port for hot-plug connection of an external pointing device, including those with built-in Mousewheel. Both the embedded sensor and the external device can be operated concurrently. The PixiPointTM Z utilizes a special signal conditioning circuit (US and International patent pending) which enables a low cost, simple and real estate-saving implementation. Just a few low tolerance external components are needed. The IC implements typically consumes less than 3mA, making it suitable for use in battery-operated systems. PS/2 communication is bidirectional at 10 kbps. The IC, a CMOS device operating at 4 MHz, is compatible with both the IBM and Microsoft two-button and the Logitech three-button mouse protocols. It implements all commands from and to the system, as defined in the IBM PS/2 Mouse Communication Protocol. Custom versions are also available to suit a range of applications.
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FEATURES * Accurate cursor control via Semtech's Advanced Motion Control algorithm * Click (Select), Double-Click (Execute), MouseWheel and slow drag are implemented in the IC - no special driver support required * Enables hot-plug connections of an external pointing device, including those with MouseWheel * Offers concurrent operation of force stick and external pointing device * Provides ideal interface for CTS Series 106, 108 and 109 sensors * Low power consumption of typically less than 3mA makes it ideal for battery-operated systems * 3-5V operation in extended temperature range APPLICATIONS * Notebooks/laptops * Handhelds PIN ASSIGNMENTS * Keyboards * Instrumentation * Can utilize standard mouse drivers * Inexpensive, simple and real estate-saving implementation with USAR's proprietary signal conditioning circuit * Offers "Clean Stop" so cursor stops when you want it to * Compatible with IBM/Microsoft two-button and Logitech threebutton mouse * Supports all commands from and to the system, as defined in the IBM PS/2 Mouse Communication Protocol * Small 32-pin 7mm X 7mm LQFP package * Customized versions available * Royalty-free and cost-effective
_RB SPWR0 SPWR1 SPWR2 SPWR3 SPWR4 DA OFST
25 24
AD SELX SELZ DRVZ VREF _RESET VSS2 VDD
8 9 16 17
_MB _LB INH MDAT MCLK SSELECT XCLK1 XCLK
PixiPoint and MouseCoder are trademarks of Semtech Corp. All other trademarks belong to their respective companies.
Copyright Semtech 2000-2001 DOC7-PXZ-P440-DS-111
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OCSIN _OSCOUT VSS DRV_XY0 DRV_XY1 Z_SIG0 Z_SIG1 XDAT
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ORDERING CODE
Package options 32-pin, Plastic LQFP Pitch in mm's 0.5 TA = -20C to +85C UR7HCPXZ-P440-FA
XX = Optional for customization codes
BLOCK DIAGRAM
LEFT, MIDDLE, RIGHT & SCROLL BUTTONS
3
Data Buffer
Switch Interface
3
MCLK MDAT X/Y/Z Channel Activation Control
PS/2 Communication Port
X Input
Analog Signal Input
Y Input
Signal Conditioning Control Power Strobe
XCLK XDAT
8042 Emulation Port
Control PixiPoint
TM
5
Z Interface
16-bit Timer Power-On Reset Oscillator Circuit
2
OSCIN-OSCOUT
Copyright Semtech 2000-2001 DOC7-PXZ-P440-DS-111
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FUNCTIONAL DESCRIPTION The UR7HCPXZ-P440 consists functionally of five major sections (see Functional Diagram, previous page). These are the PixiPointTM Z Interface, the 16-Bit Timer, the Oscillator Circuit, the PS/2 Communication Port and the 8042 Emulation Port. All sections communicate with each other and operate concurrently. SIGNAL CONDITIONING CIRCUIT The PixiPointTM Z sensor is a flexible (but very firm) "beam" with four Strain Gages - one on each of the sides. If the force is applied precisely in the X direction, then it will produce a change of resistance of only the two X gages. Force in the Y direction will cause changes only in the Y gages. One of the pair of the gages will increase, while the other will concurrently decrease the resistance. If the user presses on the sensor from the top (Z Axis), all of the strain gages will decrease the resistance. When the test current is passed through the gages, these resistance changes are converted into the voltage changes. These signals are very small, typically under 1 mV Full Scale. The Signal Conditioning Circuit (patent pending) balances and amplifies the incoming signals for digitizing by a built-in A/D converter.
PIN DEFINITIONS
Mnemonic VDD VSS VSS2 OSCIN Pin # 8 11 7 9 Type P P P I Name and Function Power Supply: +5V Ground Ground Oscillator Input: external clock input or one side of the Ceramic Resonator with built-in Load Capacitors Oscillator Output: open for external clock input or other side of the Ceramic Resonator with built-in Load Capacitors Reset: apply 0V to provide orderly start-up Mouse Data: connects to host's data line Mouse Clock: connects to host's clock line External Mouse Clock: PS/2 clock signal from external mouse External Mouse Clock 1: connect to XCLK External Mouse Data: PS/2 data signal from external mouse Left Button: active low, strobed sampling Middle Button: active low, strobed sampling Right Button: active low, strobed sampling Sensor's Excitation Driver Sensor's Excitation Driver: connect to DRV_XY0 Sensor's Excitation Driver Sensor's Excitation Driver: connect to Z_SIG0 Sensor's Excitation Driver Select X: control line for analog multiplexer Select Z: control line for analog multiplexer Multiplexer Inhibit Signal: active high Reference Voltage for built-in A/D Analog to Digital Converter Input Digital to Analog Converter Output Offset: resets the offset circuit during inactivity Switched Power Driver Switched Power Driver: connect to SPWR0 Switched Power Driver: connect to SPWR0 Switched Power Driver: connect to SPWR0 Switched Power Driver: connect to SPWR0 Reserved: power management control
_OSCOUT
10
O
_RESET MDAT MCLK XCLK XCLK1 XDAT _LB _MB _RB DRV_XY0 DRV_XY1 Z_SIG0 Z_SIG1 DRVZ SELX SELZ INH VREF AD DA OFST SPWR0 SPWR1 SPWR2 SPWR3 SPWR4 PWROFF
6 21 20 17 18 16 23 24 25 12 13 14 15 4 2 3 22 5 1 31 32 26 27 28 29 30 19
I I/O (nd) I/O (nd) I I/O (nd) I/O (nd) I/O (nd) I/O (nd) I/O (nd) I/O I/O I/O I/O I/O O O O AI AI I/O I/O I/O I/O I/O I/O I/O I/O
Note: An underscore before a pin mnemonic denotes an active low signal. Pin Types Legend: AI=Analog Input; I=Input; O=Output; I/O=Input or Output; I/O (nd)=Input or Output with N-chanel Open Drain driver
SIGNAL CONDITIONING CIRCUIT (CON'T) Semtech's proprietary circuit can correct a significant imbalance between the gages in each X and Y pair (+/- 25%), allowing relaxed manufacturing tolerances for the sensors, interconnecting cabling, and temperature-shift induced errors (no performance degradation over the full operating temperature range and for large temperature gradients between the paired gages).
Copyright Semtech 2000-2001 DOC7-PXZ-P440-DS-111
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BUILT-IN FEATURES The PixiPointTM Z enables click, double-click, MouseWheel action and slow drag without the need for special drivers. A standard PS/2 mouse driver can be utilized.
PS/2 COMMUNICATION At start-up or upon receiving a reset command, the PixiPointTM Z will wait between 300 and 500 milliseconds before sending an AAh to the host followed by a device ID of 00h. Then the IC will set itself to its default values, i.e. Incremental Stream Mode with 1:1 scaling, and a report rate of 100 Hz. The device will then disable itself until a command is sent from the host. PixiPointTM Z has responded or until 25 milliseconds have elapsed. EXTERNAL PS/2 PORT The UR7HCPXZ-P440 offers an external PS/2 mouse port. Data from this port is seamlessly merged with data from the internal pointing device. External devices, including those utilizing a MouseWheel, can be hot-plug connected. ERROR HANDLING For every correct command or parameter received from the host, the UR7HCPXZ-P440 sends an Acknowledge (FAh). If an invalid command or parameter is received, the UR7HCPXZ-P440 issues a Resend Request (FEh). If an invalid input is again received, the device transmits an Error Code (FCh) to the host. Both error and Resend request responses are sent by the device within 25 milliseconds. The host may not issue any new commands until either the PixiPointTM Z has responded or until 25 milliseconds have elapsed.
Copyright Semtech 2000-2001 DOC7-PXZ-P440-DS-111
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PS/2 DATA FORMAT The following table shows the data report format. Each of the two position values (X and Y) is expressed as a 9-bit Two's Complement integer with the most significant bit (the sign bit) stored separately in Byte 1. Z value (wheel or scroll) is expressed as an 8-bit Two's complement integer. If there is an overflow of the accumulator, the maximum positive or negative count is reported and the corresponding overflow bit is set.
DATA REPORT FORMAT TABLE
Byte 1 b0 b1 b2 b3 b4 b5 b6 b7 Byte 2 b0 b1 b2 b3 b4 b5 b6 b7 Byte 3 b0 Y0: LSB of Y data b1 Y1 b2 Y2 b3 Y3 b4 Y4 b5 Y5 b6 Y6 b7 Y7 Byte 4 (for wheel function; sent only if output of Z data is enabled by the driver) b0 Z0: LSB of Z data b1 Z1 b2 Z2 b3 Z3 b4 Z4 b5 Z5 b6 Z6 b7 Z7: MSB or Z data, sign bit X0: LSB of X data X1 X2 X3 X4 X5 X6 X7 Left Button status Right Button Status Middle Button Status Reserved X8: MSB of X data, sign bit Y8: MSB of Y data, sign bit X data overflow Y data overflow 1 = depressed 1 = depressed 1 = depressed Always = 1 1 = negative 1 = negative 1 = overflow 1 = overflow
STATUS REPORT FORMAT TABLE
Byte 1 b0 b1 b2 b3 b4 b5 b6 b7 Byte 2 b0 - 1 b2 - 7 Byte 3 b0-7 Current sampling rate Current resolution setting Always = 0 Right Button 1 = depressed Middle Button 1 = depressed Left Button 1 = depressed Reserved Always = 0 Scaling - 1:1 (0) / 2:1 (1) Disable - (0) / enable (1) Stream - (0) / prompt (1) mode Always = 0
Copyright Semtech 2000-2001 DOC7-PXZ-P440-DS-111
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PS/2 MODE COMMANDS When the Reset Command (FFh) is received, the UR7HCPXZ-P440 sets the following default parameters: Incremental Stream Mode, 1:1 scaling, report rate of 100 Hz, and disabled. It then sends AAh to the host followed by a device ID of 00h. The host sends the Resend Last Data Stream Command (FEh) when it detects an error in any UR7HCPXZ-P440 transmission. The device then resends the last output data packet to the host. This transmission occurs after a PixiPointTM Z transmission and before the host enables the interface allowing the next PixiPointTM Z output. The Set Default Status Command (F6h) re-initializes the device to its condition at power-up. The Disable Command (F5h) stops the device from transmitting all reports. However, the mode does not change; the PixiPointTM Z is still able to respond to commands. If the Disable Command is issued while the device is transmitting a report, the UR7HCPXZ-P440 immediately stops the transmission and disables itself. The Reset Echo Mode Command (ECh) returns the device to its previous mode, and disabled. The Set Prompt (Remote) Mode Command (F0h) sets the device to Prompt Mode. Data values are then only reported in response to a
Read Report Command (EBh).
The Read Report Command (EBh) prompts the PixiPointTM Z for a report. The report occurs even if the device has not moved or if the status of the switches did not change. The Set Incremental Stream Mode Command (EAh) sets the PixiPointTM Z to Stream Mode and disables the device. The Status Request Command (E9h) returns a 3-byte status report.
If the Set Echo Mode Command (EEh) is received, the PixiPointTM Z will immediately return any data bytes except FFh or ECh. If the PixiPointTM Z is in Incremental Stream Mode, the Enable Command (F4h) will allow it to begin data transmission. If the device is in Prompt Mode, the Enable Command will only update the internal status of the PixiPointTM Z. The PixiPointTM Z will respond to the
Set Sampling Rate Command (F3h) in both Stream and Prompt
The Set Resolution Command (E8h) controls resolution, the Set
2:1 Scaling Command (E7h)
Modes but will only update its internal status if this command is enacted while the device is in the Stream Mode. The UR7HCPXZ-P440 responds to the Read Device Type Command (F2h) with the device ID of 00h.
enables a coarse/fine tracking response, and the Set 1:1 Scaling Command (E6h) enables the values of movements to be transmitted to the host without any scaling. Due to Semtech's Advanced Motion Algorithm, Set Resolution and Scaling Commands are acknowledged and reported as activated, but their status is ignored.
Copyright Semtech 2000-2001 DOC7-PXZ-P440-DS-111
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SEQUENTIAL COMMANDS Unlike normal commands, sequential commands must be enacted with a sequence of commands. If the sequence is not consecutive or is incorrect, the PixiPointTM Z aborts the detection and responds the way it would normally respond to a command. The individual commands that comprise a sequential command have been designed so that the elements of a sequential command can be sent to the PixiPointTM Z via the standard IBM PS/2 BIOS calls and the device returns a valid response to the Status Request. This ensures that, if the sequential command is sent via the BIOS, the status response will be accurately returned even if the BIOS performs error detection. Thus, a programmer can have complete control of the mouse without having to access the device hardware port directly. The UR7HCPXZ-P440 implements a special sequential command that can be used to determine its ability to report three buttons. The sequential command is a series of commands to the PixiPointTM Z that cause the device to respond to the last command (Read Status) with alternate information. The sequence of commands is as follows.
1. 2. 3. 4. 5. Set Resolution = one count/ mm Set Scaling = 1:1 Set Scaling = 1:1 Set Scaling = 1:1 Read Status (E8H) (E6H) (E6H) (E6H) (E9H)
The response to the Read Status Command is in the following format.
Byte 1: Standard Status Information (buttons, scaling, etc.) Byte 2: Number of mouse buttons (3) Byte 3: Firmware Revision Number (encoded) or current sampling rate
Copyright Semtech 2000-2001 DOC7-PXZ-P440-DS-111
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TP1 PWROFF
+5V
M_DATA M_CLOCK EXT_M_CLOCK JP3 2 4 2 2 MDIN6_SH 6 4 16 2 15 7 14 13 12 11 10 9 GND +5V M_DATA DRV_XY 47pF Z_SIG C7 8 EXT_M_DATA 1 GND 5 3 47pF I N H M D A T Z_SIG1 Z_SIG0 UR7HCPXZ_P440 SPWR2 DRV_XY1 DRV_XY0 32-pin LQFP OSCOUT OSCIN V S S 2 V D D Y1 4.00MHz Q1 BSS84 8 7 S E L X 2 6 3 4 5 S E L Z D R V Z V R E F VSS SPWR3 SPWR4 DA OFST A D 5 3 SIG_IN 4 1 2 LMV321 C4 SIGNAL 1k GND U3 74HC4053 1 6 X Y Z 4 R3 3.16k 1% DRV_XY Z_SIG G N D 8 NOTE: 15 14 C8 1uF GND GND Optional Components (see Note) 3 12 13 X0 V X1 C C Y0 Y1 Z0 Z1 INH A BV E CE 7 GND X_NOT_Y Z_NOT_XY XY_SIG 2 Z_SIG 1 Y_SIG X_SIG 5 3 6 11 10 9 NOT_RESET GND GND .1uF 47uF R4 100k 1 2 U2 TC54VC4502ECB Reset IC (Voltage Detector) C5 R2 1 U4 R E S E T M C L K 2 1 2 0 1 9 1 8 1 7 L B P W R O F F X C L K 1 X C L K XDAT 2 3 C6
Copyright Semtech 2000-2001 DOC7-PXZ-P440-DS-111
L1 12uH SW2 SW MIDDLE 25 RB SPW0 U1 SPWR1 26 GND 27 28 29 30 D/A 31 32 GND SW3 SW RIGHT M B / S B 4.7k OFFSET M_CLOCK 1 2 3 4 5 GND JP4 PS/2 DATA SHIELD GND +5V PS/2CLOCK S5B_PH_K
SW1 SW LEFT
GND
SUGGESTED INTERFACING FOR THE PIXIPOINTTM Z UR7HCPXZ-P440-FG
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If U2 is used, do not install R4 and C8. If Active-low System Reset is available, remove R4, C8, and U2. L1 is a Hot-plug Surge Current limiter for the external PS/2 port.
SWITCHED_POWER
R1
C2 .1uF
C1
220pF
C3 .1uF
GND
JP1
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6 5 4 3 2 1
Y_SIG X_SIG DRV_XY Y_SIG X_SIG Z_SIG
487952_6
(C)1996-1999 USAR SYSTEMS
ELECTRICAL SPECIFICATIONS
Absolute Maximum Ratings Ratings Supply Voltage Input Voltage Current Drain per Pin (not including Vss or Vdd) Operating Temperature UR7HCPXZ-P440 Storage Temperature Range Symbol Vdd Vin I Ta Tstg Value -0.3 to 7.0 Vss -0.3 to Vdd +0.3 20 T low to T high -20 to +85 -40 to +125 Unit V V mA C C C
DC Electrical Characteristics, Temperature range=T low to T high unless otherwise noted) Characteristic Symbol Min Typ Max Supply Voltage 3.0 5.0 5.5 Output Voltage (10 A load) Voh Vdd-0.1 Vol 0.1 Input High Voltage Vih 0.8 x Vdd Vdd Input Low Voltage Vil Vss 0.2xVdd Input Current Iin +/- 1 Supply Current (Vdd=5.0 Vdc+/-10%, Vss=0) Idd 3.0 TBD
Unit V V V V A mA
Control Timing (Vdd=5.0 Vdc +/-10%, Vss=0 Vdc, Temperature range=T low to T high unless otherwise noted) Characteristic Symbol Min Typ Max Unit Frequency of Operation fosc MHz Crystal Option 4.0 External Clock Option 4.0 Sensor Characteristics Characteristic Resistance Matching
Symbol Rx Rx1/Rx2 Ry1/Ry2
Min 2K 75 75
Typ
Max 10K 125 125
Unit Ohms % %
Copyright Semtech 2000-2001 DOC7-PXZ-P440-DS-111
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MECHANICALS FOR THE UR7HCPXZ-P440-FG
HD D
32 25
e
F
1 24
y b
8
17
L1
9
16
Symbol
c
L Detail F
A
MD e
A A1 A2 b c D E e HD HE L L1 y b2 I2 MD ME
I2 Recommended PCB Footprint
Dimension in Millimeters Min Nom Max - - 1.7 0.1 0.2 0 1.4 - - 0.3 0.35 0.45 0.105 0.125 0.175 6.9 7.0 7.1 6.9 7.0 7.1 0.8 - - 8.8 9.0 9.2 8.8 9.0 9.2 0.3 0.5 0.7 1.0 - - 0.1 - - 0 10 - 0.5 - - - - 1.0 - - 7.4 - - 7.4
A1
A2
b2
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E HE
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For sales information and product literature, contact: HID & System Mgmt Division Semtech Corporation 568 Broadway New York, NY 10012 hidinfo@semtech.com http://www.semtech.com 212 226 2042 Telephone 212 226 3215 Telefax
Semtech Western Regional Sales 805-498-2111 Telephone 805-498-3804 Telefax Semtech Central Regional Sales 972-437-0380 Telephone 972-437-0381 Telefax Semtech Eastern Regional Sales 203-964-1766 Telephone 203-964-1755 Telefax Semtech Asia-Pacific Sales Office +886-2-2748-3380 Telephone +886-2-2748-3390 Telefax Semtech Japan Sales Office +81-45-948-5925 Telephone +81-45-948-5930 Telefax Semtech Korea Sales Sales +82-2-527-4377 Telephone +82-2-527-4376 Telefax Northern European Sales Office +44 (0)2380-769008 Telephone +44 (0)2380-768612 Telefax Southern European Sales Office +33 (0)1 69-28-22-00 Telephone +33 (0)1 69-28-12-98 Telefax Central European Sales Office +49 (0)8161 140 123 Telephone +49 (0)8161 140 124 Telefax
Copyright 2000-2001 Semtech Corporation. All rights reserved. MouseCoder, PixiPoint, and No-Drift are trademarks of Semtech Corporation. Semtech is a registered trademark of Semtech Company. All other trademarks belong to their respective companies. INTELLECTUAL PROPERTY DISCLAIMER This specification is provided "as is" with no warranties whatsoever including any warranty of merchantability, fitness for any particular purpose, or any warranty otherwise arising out of any proposal, specification or sample. A license is hereby granted to reproduce and distribute this specification for internal use only. No other license, expressed or implied to any other intellectual property rights is granted or intended hereby. Authors of this specification disclaim any liability, including liability for infringement of proprietary rights, relating to the implementation of information in this specification. Authors of this specification also do not warrant or represent that such implementation(s) will not infringe such rights.
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