Keyboard
Example
The following reports are sent if a user presses the Suspend/Sleep (Power Key 0) key on the key- board.
The Suspend/Sleep down key packet sent from the keyboard to the bridge is shown in Table
Table
Application Report | ||
Application Report | Power Key Scan | |
Header | ||
| ||
0xFE | 0x02 |
The up key packet sent from the keyboard to the bridge is shown in Example Up Key Power Keys Report.
Table
Application Report
Application Report Header
0xFE
4.3.9.1.4Keep Alive Report
An Application Report Header of 0xFC indicates that this report is a Keep Alive report. Example of a Keep Alive reports sent from the keyboard to the bridge is shown in Table
Table
Application Report
Application Report Header
0xFC
If the bridge does not receive a Keep Alive packet or an up key within a specified interval (DOWNKEY_TIME_OUT) while a down key is present, the bridge generates an up key to the com- puter.
4.3.9.1.5Battery Voltage Level Report
An Application Report Header of 0xFD indicates that this report is a Battery Voltage Level report. The Battery Voltage Level report format is shown in Table
Table
Byte | Name | |
2 | Application Report Header | |
0xFD | ||
| ||
3 | Battery Voltage Level |
The Battery Voltage Level ranges from 1 (low) to 10 (full).
The Battery Voltage Level report is sent after a keystroke that occurs whenever the keyboard has been in idle for more than 8 seconds.
CY4672 Reference Design Guide, Document # | 69 |
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