UR7HCPXZ-P440 Ver la hoja de datos (PDF) - Semtech Corporation
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UR7HCPXZ-P440 Datasheet PDF : 12 Pages
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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
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
STATUS REPORT FORMAT TABLE
Byte 1
b0
b1
b2
b3
b4
b5
b6
b7
Byte 2
b0 - 1
b2 - 7
Byte 3
b0-7
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
Current resolution setting
Always = 0
Current sampling rate
Copyright Semtech 2000-2001
5
DOC7-PXZ-P440-DS-111
www.semtech.com
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