EXII-7720SC 3M TOUCH SYSTEMS, EXII-7720SC Datasheet - Page 27

• Manufacturer Part Number: EXII-7720SC
• Manufacturer: 3M TOUCH SYSTEMS

Specifications of EXII-7720SC

• Operating Temperature (min): -40C
• Operating Temperature Classification: Commercial
• Operating Temperature (max): 70C
• Rad Hardened: No
• Lead Free Status / Rohs Status: Compliant

EX II Controller Communications
Bit
S0 – S5 Reserved
S6
S7
Mode Stream
Syntax:
Description:
Response:
Name Command
Syntax:
Description:
Description
Proximity (touch state) 1 = Touch screen is being touched (a touchdown or a continued touch).
Packet synchronization Always 1.
Table 8 Data Sequence
Data Sequence 7
S
X
x
Y
y
*MSB = Most Significant Bit, LSB = Least Significant Bit
Table 9 defines the status bits (Byte 1) for the Format Tablet data.
Table 9 Format Tablet Status Bits
<SOH>MS<CR>
Sends a continuous stream of X/Y coordinate data when you touch the screen. The
controller continues to send data as long as you touch the screen. The controller sends the
data even if the touch is stationary and unchanging.
The format of the coordinate data depends on the last format command received by the
controller.
<SOH>0<CR>
<SOH>NM<CR>
This
string contains the controller model number and current firmware revision
number (e.g., EXII-7720 Rev. 3.0) The content and format of this command can
change and therefore is not intended for normal customer use.
command returns a string of characters to help identify the controller. The
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Values
—
0 = Touch screen is not being touched (a touch liftoff or inactive).
When the proximity bit changes from 1 to 0 (touch liftoff), the
controller outputs one final set of X/Y coordinate data with the bit equal
to 0 and the X/Y coordinate data equal to the last touch point.
3M Touch Systems Proprietary Information
MSB*
1
0
0
0
0
Positive response.
6
S6
X6
X13
Y6
Y13
5
S5
X5
X12
Y5
Y12
Bits
4
S4
X4
X11
Y4
Y11
3
S3
X3
X10
Y3
Y10
2
S2
X2
X9
Y2
Y9
1
S1
X1
X8
Y1
Y8
LSB*
0
S0
X0
Y0
X7
Y7
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