22 3M™ MicroTouch™ Controller EX USB Reference Guide
3M Touch Systems, Inc. Proprietary Information -- 29489v05
Offset Field Size Value Description
7 Reserved 2 0xXXXX Reserved
9 Extended POC
Status
2 0xXXXX Additional Power On Check
Status
11 Reserved 9 9 bytes Reserved
POC Status – The status of the Power On Checks. Various controller systems are checked
at power-up. If any failures in these systems are detected, a POC flag is set. The POC
status field reports the state of these flags. The POC status information is also flashed on
the controller’s LED. The number of flashes generated for a given error is one more than
the error’s bit number. Refer to Table 3 for further details. This is a 2-byte bitmapped
field.
Note: Issuing a Status Request will suppress displaying the cable NOVRAM error (bit 6)
on the LED. Even though the error is suppressed, it will continue to flash on the LED
until the sensor is touched.
Cmd Status – The status for the last command request. This field is used to determine
whether the last request was processed successfully. It is also used to track the progress
of a multi-stage request, such as 2-point calibration. The Status Request does not affect
the contents of this field, i.e., successful or unsuccessful processing of a previous status
request does not cause the command status field to be updated.
Table 11. Valid Command Status Field Entries
Response Description
0 Failure in command processing
1 Command being processed
2 Stage 1 processing complete (for multi-stage commands)
3 Command complete
4 Soft reset occurred
5 Hard reset occurred
Touch Status – Status information for the most recent touch coordinate.
Table 12. Touch Status
Bit Number Description
0 1 if the sensor is being touched
1 - 7 Reserved
Async reports – the only active asynchronous report is the Touch Coordinate report 1.
Extended POC Status – This is additional power on status information. This is a 2-byte
bitmapped field.
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