EXII-7710UC 3M, EXII-7710UC Datasheet - Page 27

• Manufacturer Part Number: EXII-7710UC
• Description: CONTROLLER EX II USB CAPACITIVE
• Manufacturer: 3M
• Series: MicroTouch™ Controller EXr

Specifications of EXII-7710UC

• Accessory Type: Touch Screen - Controller
• Operating Supply Voltage: 5 VDC
• Resolution: 16 K x 16 K
• For Use With/related Products: Touch Screen Capacitive
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 3M5539

3M™ MicroTouch™ Controller EX USB Reference Guide
Read Parameter Request 16
Parameter
(wValue)
0
1
2
This is a request to send the contents of a parameter via the control endpoint. This is a
one-time transfer of data. The request is used to access data in the controller.
This request provides a means for reading the configuration parameters. The request uses
parameter numbers to determine what data is being requested and where that data is
located.
Table 18. Read Parameter Request
The direction bit in bmRequestType has been set to 1 (device-to-host) to return the
contents of the requested parameter.
The byte bRequest is set to 16 to indicate that this is the Read Parameter request.
The wValue field is set to the number of the parameter being requested.
This request does not use the wIndex field. This field should be set to zero to ensure
future compatibility.
The wLength field is the number of bytes being sent by the device to the host. The data is
returned to the host in the format of the Parameter Data report, which has a 3-byte header,
so 3 must be added to the number of parameter bytes desired. The following table lists
the parameters currently supported and the appropriate settings for the request fields.
Table 19. Supported Parameters
Response
The parameter data is sent to the host in a Parameter Data report. All parameter data is
treated as if it were stored as bytes. This means that multi-byte values will be sent MSB
first.
Offset
0
1
2
4
6
wIndex
0
0
0
Field
bmRequestType
bRequest
wValue
wIndex
wLength
3M Touch Systems, Inc. Proprietary Information
wLength
(bytes+3)
0
5
7
Size
1
1
2
2
2
Range
0
0 – 3
0 – 2
32
-1
0xXXXX
Value
11000000
16
0xXXXX
0x0000
Reserved for future use
Sensor orientation - where the lower left
Description
corner of the display maps to the sensor.
0000 – Upper right
0001 – Lower right
0002 – Upper left
0003 – Lower left (standard, not rotated)
Controller serial number
Characteristics
Description
Command number
Parameter number
Not used
Length of Parameter Data report
27