ur7hcts2-p840 Semtech Corporation, ur7hcts2-p840 Datasheet - Page 6

• Manufacturer Part Number: ur7hcts2-p840
• Description: High-performance, Low Power Ps/2 Touch Screen Controller/digitizer
• Manufacturer: Semtech Corporation

The following table shows the data
report format. X and Y values are
expressed as 9-bit Two’s
Complement signed integers, with
the sign bit / most significant bit
separate. If there is an overflow of
the accumulator, the maximum
positive or negative count is
reported and the corresponding
overflow bit is set.
Semtech offers a high-performance
driver for Windows 95, Windows 98,
Windows Me, and Windows NT.
Please check with Semtech for other
driver availability.
Those that wish to undertake their
own driver development will need to
request from Semtech the document
covering the extended PS/2 protocol
used by the UR7HCTS2-P840.
Copyright ©1999-2001 Semtech Corporation
DOC7-TS2-P840-DS-106
PS/2 DATA FORMAT
EXTENDED PS/2 PROTOCOL
Byte 1
Byte 2
Byte 3
DATA REPORT FORMAT TABLE
STATUS REPORT FORMAT TABLE
6
Byte 1
Byte 2
Byte 3
Byte 4 (only for Wheelmouse-type devices)
b0
b1
b2
b3
b4
b5
b6
b7
b0 - 1
b2 - 7
b0-7
b0
b1
b2
b3
b4
b5
b6
b7
b0
b1
b2
b3
b4
b5
b6
b7
b0
b1
b2
b3
b4
b5
b6
b7
b0
b1
b2
b3
b4
b5
b6
b7
Right Button
Middle Button
Left Button
Reserved
Scaling - 1:1 (0) / 2:1 (1)
Disable - (0) / enable (1)
Stream - (0) / prompt (1) mode
Current resolution setting
Current sampling rate
Left Button status
Right Button Status
Middle Button Status
Reserved
X8: MSb of X data, sign bit
Y8: MSb of Y data, sign bit
X data overflow
Y data overflow
X0: LSb of X data
X1
X2
X3
X4
X5
X6
X7:
Y0: LSb of Y data
Y1
Y2
Y3
Y4
Y5
Y6
Y7:
Z0: LSb of Z data
Z1
Z2
Z3
Z4
Z5
Z6
Z7: MSb of Z data
www.semtech.com
1 = depressed
1 = depressed
1 = depressed
Always = 0
Always = 0
Always = 0
1 = depressed
1 = depressed
1 = depressed
Always = 1
1 = negative
1 = negative
1 = overflow
1 = overflow