Specifications

Section 4. USB Communications
17
Item
Value(Hex)
Output (Data, Variable, Absolute)
91 02
Report Count (1)
95 01
Report Size (3)
75 03
Output (Constant)
91 03
Report Count (6)
95 06
Report Size (8)
75 08
Logical Minimum (0)
15 00
Logical Maximum (101)
25 66
Usage Page (Key Codes)
05 07
Usage Minimum (0)
19 00
Usage Maximum (101)
29 66
Input (Data, Array)
81 00
Logical Maximum (255)
26 FF 00
Usage Page (vendor defined (MSR))
06 00 FF
Usage (command data)
09 20
Report Count
95 18
Feature (Data, Variable, Absolute, Buffered Bytes)
B2 02 01
End Collection
C0
COMMANDS
Command requests and responses are sent to and received from the device using feature reports.
Command requests are sent to the device using the HID class specific request Set_Report. The
response to a command is retrieved from the device using the HID class specific request
Get_Report. These requests are sent over the default control pipe. When a command request is
sent, the device will Nak the Status stage of the Set_Report request until the command is
completed. This insures that as soon as the Set_Report request is completed, the Get_Report
request can be sent to get the command response. The usage ID for the command message was
shown previously in the Usage Table.
The following table shows how the feature report is structured for command requests:
Offset
Field Name
0
Command Number
1
Data Length
2 – 23
Data
The following table shows how the feature report is structured for command responses.
Offset
Field Name
0
Result Code
1
Data Length
2 – 23
Data