UR7HCPXZ-P440 Ver la hoja de datos (PDF) - Semtech Corporation

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UR7HCPXZ-P440

Advanced “Click-to-Select" No-Drift™ PS/2 Force Stick Controller

Semtech Corporation 

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

4

DOC7-PXZ-P440-DS-111

www.semtech.com

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