EXII-7710UC 3M, EXII-7710UC Datasheet - Page 24

• 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

24
Restore Defaults Request 8
The host should issue status and ID requests after the reset has completed to verify
whether this request was handled properly by the device. The status request should be
used to determine when the hard reset occurred. The ID request is used to verify that the
controller is now in the desired mode by looking at the contents of the controller type
field.
The device stalls endpoint 0 if the request cannot be processed successfully. The request
cannot be processed if the reset type specified by the wValue field is not valid.
EX Controller Compatibility Issues
The hard reset did not use a device disconnect as part of the reset process for the previous
3M™ MicroTouch™ USB controller. The disconnect causes the driver to unload and will
result in any handles to the driver that an application may have becoming invalid. An
application should handle an unplug event.
This is a request to restore the default values in the controller. This is used to restore the
values to the factory presets.
A soft reset is automatically done after completing the request so that parameter changes
will take effect.
Table 15. Restore Defaults Request
The direction bit in bmRequestType has been set to 0 (host-to-device). This request does
not require that the device return any data.
The byte bRequest is set to 8 to indicate that this is the Restore Defaults request.
The wValue field should be set to 0 for future compatibility.
The wIndex field should be set to 0 for future compatibility.
Response
The device stalls endpoint zero if it cannot process this request. The request will fail if
any of the fields are not set correctly.
When the request is processed successfully, a positive USB acknowledge (zero length
data packet) is sent.
A soft reset will be done at the completion of this request. Because of this, the controller
must be polled to determine when the reset is done (see Reset Request for details).
Offset
0
1
2
4
6
3M Touch Systems, Inc. Proprietary Information
Field
bmRequestType
bRequest
wValue
wIndex
wLength
3M™ MicroTouch™ Controller EX USB Reference Guide
Size
1
1
2
2
2
Value
01000000
0x0000
0x0000
8
0x0000
Description
Characteristics
Command number
Reserved
Reserved
No data phase