Datasheet UR7HCPZ-S440-FG Datasheet (Semtech)

PixiPointTMZ Serial UR7HCPXZ-S440

Advanced “Click-to-Select”

No-DriftTMPointing Stick Controller

PixiPoint is a trademark of Semtech Corporation. All other trademarks belong to their respective companies.

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HID & SYSTEM MANAGEMENT PRODUCTS, MOUSECODERTMFAMILY

DESCRIPTION FEATURES

• Handhelds/Notebooks

• Smart Phones

• Internet appliances

• Instrumentation

The PixiPointTMZ Serial mouse encoder is a cost-effective, highfunctionality IC for strain gauge “miniature joysticks” with Z-axis functionality, such as the CTS series 106, 108 & 109. Ideal for portable and other systems that need to interface a mouse to a serial port, the low-power (typically less than 3mA) PixiPointTMZ offers an advanced algorithm for enhanced motion control.

The IC implements the Tap (select) and Double Tap (execute) and Press Hold (drag) functions in firmware. No special drivers are needed to access these “Z” functions. Other special features provided by the IC include CleanStopTM, which allows the cursor to stop exactly when you want it to and EasyDragTM, which reduces the speed of the cursor during drag, making it easier to handle.

The PixiPointTMZ utilizes a special, patented signal conditioning circuit which enables a low-cost, simple and real estate-saving implementation. Just a few low tolerance external components are needed.

Serial transmission use speed of 1200 Baud with 7N1 framing. The IC, a CMOS device operating at 4 MHz, utilizes the standard serial mouse protocol, including Plug-nPlay identification for MouseWheel support.

The PixiPoint

TM

Z IC is also available

for PS/2-enabled systems.

• Offers CleanStopTMso cursor stops when you want it to

• Supports Scrolling (MouseWheel)

• Low-power consumption of typically less than 3mA makes it ideal for battery-operated systems

• Operates at 3-5V in extended temperature range

• Uses small 32-pin 7mm X 7mm LQFP package

• Inexpensive, turn-key solution

• Utilizes sophisticated, patented signal conditioning circuit requiring less than 15 components

• Customized versions available

• Interfaces the system via serial port, making it ideal for non-PC systems

• Accurate No-Drift

TM

cursor control

via Semtech’s advanced algorithm

• Interfaces strain gauge “miniature joysticks” with Z-Axis functionality, such as those from CTS

• Implements the Tap (select), Double Tap (execute) and Press Hold (drag) in firmware – no special serial drivers required

• EasyDragTMfeature reduces the speed of the cursor during drag, making it easier to handle

1

8

9

32

25

24

16

17

AD SELX SELZ

DRVZ

VREF

_RESET

VSS2

VDD

SP1 SP0 INH _RB _SB _MB _LB SENSOR_SEL

OCSIN

_OSCOUT

VSS

DRV_XY0

DRV_XY1

Z_SIG0

Z_SIG1

ZTAP_EN

SP2

RTS

TXD

SP3

SP4

SP5

DA

OFST

APPLICATIONS

PIN ASSIGNMENTS

ORDERING CODE

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Package Options Pitch in mm’s TA=-20° C to +85° C

32-pin, Plastic LQFP 0.5 UR7HCPXZ-S440-FG

Other Materials Type Order number

PixiPointTMZ Serial EK Evaluation Kit EVK7-PXZ-S440-XXX

Note 1: XX= Optional Customization

XXX= Denotes Revision number

Data Buffer

PixiPoint™ Z Serial

Power-on

Reset

Serial

Communication

Port

Switch

Interface

X Input

Y Input

Z Input

Control

16-Bit Timer

Ocillator Circuit

TXD RTS

OSCIN-OSCOUT

Left, Middle, Scroll

And Right Mouse Buttons

3

X/Y/Z Channel Activation Control

Analog Input Signal

Signal Condition. Control Power Strobe

3

5

2

BLOCK DIAGRAM

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 RTS 26 I Request to Send: High = Disable TX TXD 27 I Transmit to Host: Idle High _LB 18 I/O (nd) Left Button: active low, strobed sampling _MB 19 I/O (nd) Middle Button: active low, strobed sampling _SB 20 I/O (nd) Scroll Button: active low, strobed sampling _RB 21 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 SP0 23 I/O Switched Power Driver SP1 24 I/O Switched Power Driver: connect to SP0 SP2 25 I/O Switched Power Driver: connect to SP0 SP3 28 I/O Switched Power Driver: connect to SP0 SP4 29 I/O Switched Power Driver: connect to SP0 SP5 30 I/O Switched Power Driver: connect to SP0 SENSOR_SEL 17 I/O(nd) Sensor Select Pin: Float - CTS, Low - Bokum ZTAP_EN 16 I/O(nd) ZTAP Z Enable Pin: Float - Enabled, Low - Disable

Note: An underscore before a pin mnemonic denotes an active low signal. For SENSOR_SEL and ZTAP_EN Pins: Upon power-up they are inputs with pull-up. After initialization, the chip will switch the pull-ups off and drive these pins low. Selection of a particular mode is made by connecting the pin to ground or leaving it not connected (floating). Pin Types Legend: AI=Analog Input; I=Input; O=Output; I/O=Input or Output; I/O (nd)=Input or Output with N-channel Open Drain driver

The UR7HCPXZ-S440 consists functionally of four major sections (see Functional Diagram, previous page). These are the PixiPoint

TM

Z Interface, the 16-Bit Timer, the Oscillator Circuit and the Serial Communication Port. All sections communicate with each other and operate concurrently.

Semtech’s proprietary circuit can correct a significant imbalance between the gauges 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 gauges).

SIGNAL CONDITIONING CIRCUIT

The PixiPointTMZ sensor is a flexible (but very firm) “beam” with four Strain Gauges – one on each of the sides. If force is applied precisely in the X direction, then it will produce a change of resistance of only the two X gauges. Force in the Y direction will cause changes only in the Y gauges. One of the pair of the gauges will increase, while the other will concurrently decrease in resistance.

If the user presses on the sensor from the top (Z-Axis), all of the strain gauges will decrease the resistance.

When a test current is passed through the gauges, these resistance changes are converted into the voltage changes. These signals are very small, typically under 1 mV Full Scale.

The patented Signal Conditioning Circuit balances and amplifies the incoming signals for digitizing by a built-in A/D converter.

SIGNAL CONDITIONING CIRCUIT (CON’T)

BUILT-IN FEATURES POWER CONSUMPTION

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The UR7HCPXZ-S440 typically consumes less than 3mA. Low-power consumption makes it suitable for use in battery-operated systems.

Semtech utilizes the scroll button to switch the PixiPointTMZ from normal operation mode to scroll mode. When scroll button is pressed, the UR7HCPXZ-S440 will convert the Yaxis data to Z-axis data (scroll data) and output zero motion for X-axis and Y-axis. When the scroll button is released, the UR7HCPXZ-S440 outputs X/Y motion data and zero displacement for Z-Axis.

Ta p

— Select.

Double Tap

— Execute.

Press Hold

— Drag.

EasyDrag

TM

— reduces the speed of the cursor when the user is dragging an object on the desktop, making it simple to accurately handle the object.

CleanStop

TM

— ensures that the cursor stops the instant the user needs it to.

No special drivers are needed to access any of these features. Scrolling (MouseWheel) operations require IntelliMouse-compatible Driver with Plug-n-Play support.

SERIAL COMMUNICATION

Communication through the serial port is uni-directional at a fixed speed of 1200 Baud, 7N1 protocol (7 data bits, 1 stop bit, no parity check).

The Host can reset the device at any time by setting the RTS line High. When RTS is set Low after a delay of at least 100ms, the device will respond with an Identification and Plug-n-Play strings. This procedure is known as “RTS Toggle Handshaking.” When RTS goes low, the device will send the ID characters “MZ” (0x4D, 0x5A) indicating wheel capability to the Host. Then a ZERO motion report (0x40, 0x00, 0x00, 0x00) is sent as a separator, followed by the Plug and Play string “vvPNP0F0A\\MOUSE\PNP0F0A\USAR SERIAL PIXZ MOUSEcc.”

Plug and Play is a sequence of ASCII characters with their codes reduced by 0x20. Note, vv is a version number, 2 Bytes, and cc is a Check Sum, 2 Bytes. For further information, please refer to “Plug and Play External COM Device Specification,” available from Microsoft.

4-Byte Data Report is sent if motion is detected, or if buttons are pressed or released. Motion is reported relative to the last Report sent, in a Two’s Complement form and eight (8) bit resolution. In other words, the Maximum Motion values are -128 to +127, saturated at min/max for faster speeds. Z3-Z0 is Z-displacement. It is 4-bit Two’s Complement value from -8 to +7.

HARDWARE INTERFACE FOR THE COMMUNICATION LINES

FEATURES

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Byte 1

b0 X6 b1 X7: MSB of X Data b2 Y6 b3 Y7: MSB of Y Data b4 Right Button Status, 1 = depressed b5 Left Button Status, 1 = depressed b6 Always=1

Byte 2

b0 X0: LSB of X data b1 X1 b2 X2 b3 X3 b4 X4 b5 X5 b6 Always=0

Byte 3

b0 Y0: LSB of Y data b1 Y1 b2 Y2 b3 Y3 b4 Y4 b5 Y5 b6 Always=0

Byte 4

b0 Z0: LSB of Z data b1 Z1 b2 Z2 b3 Z3: MSB of Z data b4 Middle Button Status; 1=depressed b5 Always=0 b6 Always=0

The TXD and RTS lines are CMOS logic-level signals, suitable for direct connection to the pins of an UART. Interfacing via the RS-232 port requires an addition of an inverting driver and receiver. Simple one-transistor inverting driver and receiver can also be utilized. Contact Semtech for more details.

SUGGESTED INTERFACING FOR THE PIXIPOINTTMZ SERIAL UR7HCPXZ-S440-FG

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Document Number REV

UR7PXZS1.sch

1.7

PixiPoint Z with STD Serial Interface

GND

SW4

SW

SCROLL

A

D

1

SEL

X

2

SEL

Z

3

DRV

Z

4

VRE

F

5

RESET

6

VSS

2

7

VDD

8

OSCIN

9

OSCOUT

10

VSS

11

DRV_XY0

12

DRV_XY1

13

Z_SIG0

14

Z_SIG1

15

ZTEN

16

SSE

L

1

7

L

B

1

8

M

B

1

9

S

B

2

0

R

B

2

1

INH

2

SP0

2

3

SP1

2

4

SP2

25

RTS

26

TXD

27

SP3

28

SP4

29

SP5

30DA 31

OFST

32

U1

UR7HCPXZ_S440

SW2

SW

MIDDLE

SW3

SW

RIGHT

GND GND

+5V

R4

100k

SW1

SW

LEFT

GND

+5V

Q2

DTA144EKA

Optional RS232

Interface

RS232TxD TxD

RS232RTS RTS

Q3

DTC144EKA

D1

xx4148

C2

10nF

X7R

OFFSET

SWITCHED_POWER

D/A

>RTS_IN

SER_OUT<

C1

100pF

RTS

TxD

IDLE=HIGH

RTS=LOW=ENABLE Tx

R1

22k

32-pin LQFP

Y1

4.00MHz

DRV_XY

Z_SIG

+5V

GND

Q1

BSS84

C8

1uF

R5

100k

1

2

3

U2

TC54VC3502ECB

NOT_RESET

GND GNDGND

R3

3.16k

1%

C5

47uF

C4

.1uFSIGNAL

SIG_IN

XY_SIG

X0

12X1 13Y0 2Y1 1Z0 5Z1 3

INH

6A 11B 10C 9

X14Y15Z

4

VCC

1

6

VEE

7

GND

8

U3

74HC4053

4

1

3

5

2

U4

LMV321

R2

1k

GND

C3

10nF

X7R

65432

1

JP1

487952_6

X_SIG

Y_SIG

Z_SIG

DRV_XY

NOTE:

If U2 is used, do not

install R5 and C8.

If Active-low System

Reset is available,

remove R5, C8, and U2.

C5 (47uF) can be

replaced w/ 3x 10uF.

X_NOT_Y

Z_NOT_XY

X_SIG

Y_SIG

Z_SIG

GND

INH

DRV_XY

Z_SIG

GND

Reset IC

(Voltage Detector)

MECHANICAL INFORMATION FOR FG (32 PIN LQFP) PACKAGE

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A

e

F

b

y

c

A1 A2

L1

L

Detail F

e

M

D

ME

b2

I2

Recommended PCB Footprint

–

0.1

– ––

0.2

–

––

– –

––

–

Symbol

Min Nom Max

A

2

b c

D

E

H

E

L

1

y

b

2

Dimension in Millimeters

H

D

A1

0.5 ––

I

2

1.0 ––

M

D

7.4 ––

M

E

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

0

1.7

e

E

H

E

1

8

9

32 25

24

16

17

HD

D

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-S440 -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 %

PIXIPOINTTMZ SERIAL BILL OF MATERIALS FOR PAGE 6 SCHEMATIC

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UR7HCPXZ-S440-FG BOM Description Quantity Manufacturer Part# Description Capacitors:

C1 1 Generic Any 100pF, 5%, Ceramic, NPO or X7R C2, C3 2 Generic Any .01uF, 10% Ceramic, X7R C4 1 Generic Any .1uF, 10%, Ceramic, X7R or Z5U C5 1 Generic Any 47uF, 10%, Ceramic, X7R or Z5U C8 1 Generic Any 1uF, +80/-20% Ceramic X5R, Z5U, Y5V

ICs:

U4 1 National LMV321M5 Single OpAmp, Low Voltage, SOT23-5 U3 1 Generic 74HC4053 Tri 2-ch Analog Mux U1 1 Semtech UR7HCPXZ-S440-FG PixiPointTMZ Controller U2 1 TelCom TC54VC2702ECB Reset IC

Resistors:

R2 1 Generic Any 1k, 5%, 1/16W R3 1 Generic Any 3.16k, 1%, 1/16W R1 1 Generic Any 22k, 5%, 1/16W R4,R5 2 Generic Any 100k, 5%, 1/16W

Resonator:

Y1 1 AVX PBRC-4.00BR 4.00MHz Ceramic Resonator w/ Caps, SMT

Transistor:

Q1 1 Zetex BSS84ZXCT MOSFET_P Transistor, SMT, SOT-23

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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 ©1999-2001Semtech Corporation. All rights reserved. PixiPoint and MouseCoder are trademarks of Semtech Corporation. Semtech is a registered trademark of Semtech Corporation. 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.

Datasheet UR7HCPZ-S440-FG Datasheet (Semtech)

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