Datasheet UR7HCPZ-P440-FA, UR7HCDMP-CP, UR7HCDMP-CDW Datasheet (Semtech)

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PixiPointTMZ UR7HCPXZ-P440

Advanced “Click-to-Select”

No-DriftTMPS/2 Force Stick Controller

PixiPoint and MouseCoder are trademarks of Semtech Corp. All other trademarks belong to their respective companies.

www.semtech.com

HID & SYSTEM MANAGEMENT PRODUCTS, MOUSECODERTMFAMILY

DESCRIPTION FEATURES

AD SELX SELZ

DRVZ

VREF

_RESET

VSS2

VDD

_MB _LB INH MDAT MCLK SSELECT XCLK1 XCLK

OCSIN

_OSCOUT

VSS

DRV_XY0

DRV_XY1

Z_SIG0

Z_SIG1

XDAT

_RB

SPWR0

SPWR1

SPWR2

SPWR3

SPWR4

OFST

• Notebooks/laptops

• Handhelds

• Keyboards

• Instrumentation

The PixiPointTMZ 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 PixiPointTMZ 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 PixiPointTMZ 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.

• 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

• 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

PIN ASSIGNMENTS

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BLOCK DIAGRAM

ORDERING CODE

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Data Buffer

PS/2 Communication

Port

8042 Emulation

Port

MCLK

MDAT

XCLK

XDAT

PixiPointTMZ Interface

Oscillator Circuit

Power-On Reset

Switch Interface

X Input

Y Input

Control

OSCIN-OSCOUT

16-bit Timer

Power Strobe

X/Y/Z Channel

Activation Control

Analog Signal Input

Signal Conditioning

Control

LEFT, MIDDLE,

RIGHT & SCROLL

BUTTONS

Package options

32-pin, Plastic LQFP

Pitch in mm’s

0.5

TA = -20°C to +85°C

UR7HCPXZ-P440-FA

XX = Optional for customization codes

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FUNCTIONAL DESCRIPTION PIN DEFINITIONS

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Mnemonic Pin # Type Name and Function

VDD 8 P Power Supply: +5V VSS 11 P Ground VSS2 7 P Ground OSCIN 9 I Oscillator Input: external clock input or one

side of the Ceramic Resonator with built-in Load Capacitors

_OSCOUT 10 O Oscillator Output: open for external clock

input or other side of the Ceramic Resonator with

built-in Load Capacitors _RESET 6 I Reset: apply 0V to provide orderly start-up MDAT 21 I/O (nd) Mouse Data: connects to host’s data line MCLK 20 I/O (nd) Mouse Clock: connects to host’s clock line XCLK 17 I External Mouse Clock: PS/2 clock signal from

external mouse XCLK1 18 I/O (nd) External Mouse Clock 1: connect to XCLK XDAT 16 I/O (nd) External Mouse Data: PS/2 data signal from

external mouse _LB 23 I/O (nd) Left Button: active low, strobed sampling _MB 24 I/O (nd) Middle Button: active low, strobed sampling _RB 25 I/O (nd) Right Button: active low, strobed sampling DRV_XY0 12 I/O Sensor’s Excitation Driver DRV_XY1 13 I/O Sensor’s Excitation Driver: connect to DRV_XY0 Z_SIG0 14 I/O Sensor’s Excitation Driver Z_SIG1 15 I/O Sensor’s Excitation Driver: connect to Z_SIG0 DRVZ 4 I/O Sensor’s Excitation Driver SELX 2 O Select X: control line for analog multiplexer SELZ 3 O Select Z: control line for analog multiplexer INH 22 O Multiplexer Inhibit Signal: active high VREF 5 AI Reference Voltage for built-in A/D AD 1 AI Analog to Digital Converter Input DA 31 I/O Digital to Analog Converter Output OFST 32 I/O Offset: resets the offset circuit during inactivity SPWR0 26 I/O Switched Power Driver SPWR1 27 I/O Switched Power Driver: connect to SPWR0 SPWR2 28 I/O Switched Power Driver: connect to SPWR0 SPWR3 29 I/O Switched Power Driver: connect to SPWR0 SPWR4 30 I/O Switched Power Driver: connect to SPWR0 PWROFF 19 I/O Reserved: power management control

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

The UR7HCPXZ-P440 consists functionally of five major sections (see Functional Diagram, previous page). These are the PixiPointTMZ 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.

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).

SIGNAL CONDITIONING CIRCUIT

SIGNAL CONDITIONING CIRCUIT (CON’T)

The PixiPointTMZ 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.

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BUILT-IN FEATURES PS/2 COMMUNICATION

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At start-up or upon receiving a reset command, the PixiPointTMZ 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. PixiPointTMZ has responded or until 25 milliseconds have elapsed.

The PixiPointTMZ enables click, double-click, MouseWheel action and slow drag without the need for special drivers. A standard PS/2 mouse driver can be utilized.

EXTERNAL PS/2 PORT

ERROR HANDLING

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.

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 PixiPointTMZ has responded or until 25 milliseconds have elapsed.

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PS/2 DATA FORMAT DATA REPORT FORMAT TABLE

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Byte 1

b0 Left Button status 1 = depressed b1 Right Button Status 1 = depressed b2 Middle Button Status 1 = depressed b3 Reserved Always = 1 b4 X8: MSB of X data, sign bit 1 = negative b5 Y8: MSB of Y data, sign bit 1 = negative b6 X data overflow 1 = overflow b7 Y data overflow 1 = overflow

Byte 2

b0 X0: LSB of X data b1 X1 b2 X2 b3 X3 b4 X4 b5 X5 b6 X6 b7 X7

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

Byte 1

b0 Right Button 1 = depressed b1 Middle Button 1 = depressed b2 Left Button 1 = depressed b3 Reserved Always = 0 b4 Scaling - 1:1 (0) / 2:1 (1) b5 Disable - (0) / enable (1) b6 Stream - (0) / prompt (1) mode b7 Always = 0

Byte 2

b0 - 1 Current resolution setting b2 - 7 Always = 0

Byte 3

b0-7 Current sampling rate

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.

STATUS REPORT FORMAT TABLE

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PS/2 MODE COMMANDS

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The Read Report Command

(EBh)

prompts the PixiPointTMZ 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 PixiPointTMZ to Stream Mode and disables the device.

The Status Request Command

(E9h)

returns a 3-byte status

report. The Set Resolution Command

(E8h)

controls resolution, the Set

2:1 Scaling Command (E7h)

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.

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 PixiPointTMZ transmission and before the host enables the interface allowing the next PixiPointTMZ 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 PixiPointTMZ 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).

If the Set Echo Mode Command

(EEh)

is received, the PixiPointTMZ will immediately return any data bytes except FFh or ECh.

If the PixiPointTMZ 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 PixiPoint

Z. The PixiPointTMZ will respond to the

Set Sampling Rate Command (F3h)

in both Stream and Prompt 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.

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SEQUENTIAL COMMANDS

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Unlike normal commands, sequential commands must be enacted with a sequence of commands. If the sequence is not consecutive or is incorrect, the PixiPointTMZ 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 PixiPointTMZ 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 PixiPointTMZ that cause the device to respond to the last command (Read Status) with alternate information.

The sequence of commands is as follows.

1. Set Resolution = one count/ mm (E8H)

2. Set Scaling = 1:1 (E6H)

3. Set Scaling = 1:1 (E6H)

4. Set Scaling = 1:1 (E6H)

5. Read Status (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

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SUGGESTED INTERFACING FOR THE PIXIPOINTTMZ UR7HCPXZ-P440-FG

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531

JP3

MDIN6_SH

47pF

12uH

+5V

M_DATA

M_CLOCK

EXT_M_CLOCK

SW3SWRIGHT

TP1

PWROFF

SEL

DRV

VRE

RESET

VSS

VDD

OSCIN

OSCOUT

VSS

DRV_XY0

DRV_XY1

Z_SIG0

Z_SIG1

XDAT

XCL

XCLK1

PWROF

MCL

MDA

INH

MB/SB

SPW0

SPWR1

SPWR2

SPWR3

SPWR4

30DA 31

OFST

UR7HCPXZ_P440

SW1SWLEFT

SW2SWMIDDLE

OFFSET

SWITCHED_POWER

GND GND

.1uF

220pF

4.7k

GND

D/A

32-pin LQFP

4.00MHz

EXT_M_DATA

DRV_XY

Z_SIG

GND

47pF

GND

PS/2 DATA

SHIELD

GND

+5V

PS/2CLOCK

JP4

S5B_PH_K

M_DATA

M_CLOCK

+5V

GND

TC54VC4502ECB

Reset IC

(Voltage Detector)

NOT_RESET

GND GND GND

47uF

BSS84

100k

1uF

.1uF

SIGNAL

SIG_IN

12X1 13Y0 2Y1 1Z0 5Z1 3

INH

6A 11B 10C 9

X14Y15Z

VCC

VEE

GND

74HC4053

3.16k

XY_SIG

GND

.1uF

LMV321

65432

JP1

487952_6

X_SIG

Y_SIG

Z_SIG

DRV_XY

X_SIG

Y_SIG

Z_SIG

X_NOT_Y

Z_NOT_XY

GND

NOTE:

If U2 is used, do not

install R4 and C8.

L1 is a Hot-plug Surge

Current limiter for

the external PS/2 port.

If Active-low System

Reset is available,

remove R4, C8, and U2.

DRV_XY

Z_SIG

GND

Optional Components (see Note)

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ELECTRICAL SPECIFICATIONS

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Absolute Maximum Ratings Ratings Symbol Value Unit

Supply Voltage Vdd -0.3 to 7.0 V Input Voltage Vin Vss -0.3 to Vdd +0.3 V Current Drain per Pin I 20 mA (not including Vss or Vdd) Operating Temperature Ta T low to T high ° C UR7HCPXZ-P440 -20 to +85 ° C Storage Temperature Range Tstg -40 to +125 ° C

DC Electrical Characteristics, Temperature range=T low to T high unless otherwise noted) Characteristic Symbol Min Typ Max Unit

Supply Voltage 3.0 5.0 5.5 V Output Voltage (10 µA load) Voh Vdd–0.1 V

Vol 0.1 Input High Voltage Vih 0.8 x Vdd Vdd V Input Low Voltage Vil Vss 0.2xVdd V Input Current Iin +/- 1 µA Supply Current (Vdd=5.0 Vdc+/-10%, Vss=0) Idd 3.0 TBD 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 Symbol Min Typ Max Unit

Resistance Rx 2K 10K Ohms Matching Rx1/Rx2 75 125 %

Ry1/Ry2 75 125 %

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MECHANICALS FOR THE UR7HCPXZ-P440-FG

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A1 A2

Detail F

Recommended PCB Footprint

–

0.1

– ––

0.2

–

––

– –

––

–

Symbol

Min Nom Max

c D E

Dimension in Millimeters

0.5 ––

1.0 ––

7.4 ––

7.4

10ϒ0ϒ

0.1

1.0

0.70.50.3

9.29.08.8

0.8

7.17.06.9

0.1750.1250.105

0.450.350.3

1.4

1.7

32 25

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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

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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.