UR7HCPXZ-P440 查看數據表（PDF） - Semtech Corporation

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UR7HCPXZ-P440

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

Semtech Corporation 

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. Set Resolution = one count/ mm

2. Set Scaling = 1:1

3. Set Scaling = 1:1

4. Set Scaling = 1:1

5. 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

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DOC7-PXZ-P440-DS-111

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