EXII-7720SC 3M TOUCH SYSTEMS, EXII-7720SC Datasheet - Page 23

• 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
Response:
Calibrate Raw
Syntax:
Description:
Response:
3. Touch the screen at an upper right target, which is located 12.5% (1/8) in from the
Touching the two valid calibration points results in a successful calibration. If either
calibration point is invalid, the calibration fails. The EX II 1700SC and 7720SC
controller restores the previous calibration values. If the Calibrate Extended failed, repeat
the CX process.
<SOH>1<CR>
Indicates that the controller received a valid touch coordinate (point) when the target was
touched. Two valid touch points indicate a successful calibration.
<SOH>0<CR>
Indicates that the touch point is out of range of the expected target area. If you receive a
negative response, you must start over again.
No Response
Indicates that the user did not touch the target long enough to provide an accurate
calibration point.
<SOH>CR<CR>
Allows the collection of raw (signed) X and Y coordinates before the normal scaling,
linearization, and filtering processes. The controller sends a continuous stream of data in
Calibrate Raw mode.
The Calibrate Raw data is a 5-byte packet that includes 1 status byte and 4 bytes of
binary X/Y coordinate data. Each X/Y coordinate includes 10 binary bits and 1 sign bit.
The 10 bits represent coordinates within a range of -1024 to +1023.
To use the Calibrate Raw command, the controller and host system must be in an 8-bit
data communication mode. The Calibrate Raw command returns a negative response if
the controller is not using an 8-bit communication mode. To end Calibrate Raw mode,
issue a Reset command.
3M Touch Systems uses the Calibrate Raw command during manufacturing and testing,
and recommends you only use this command for diagnostics when you want raw data.
<SOH>0<CR>
After the controller is in Calibrate Raw mode, the controller returns a response in the
following format:
SXxYy where:
corner of the video image. The controller returns an acknowledgment of
<SOH>1<CR>. This is a positive response. If you receive a negative response, you
must start over again.
3M Touch Systems Proprietary Information
Positive response.
Negative response
Positive response.
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