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CY4636 WirelessUSB™ LP Keyboard Mouse Reference Design Kit User Guide, Doc. # 001-70355 Rev. *A
Figure A-12. Bind Timing Diagram
The bridge uses the Receive Signal Strength Indicator (RSSI) to determine the noise level on the
channel. If the channel has become noisy, the bridge moves to Ping Mode to find a quieter channel
in its channel subset. When the HID loses connection with the bridge, it moves to Reconnect Mode
to find the bridge. The HID sends a Connect Request packet and listens for an AutoACK packet. If
the HID receives the AutoACK, it immediately enables its receiver and listens for the Connect
Response packet from the bridge. If the HID does not receive the AutoACK, it selects the next chan-
nel using the Channel Selection Algorithm and repeats this procedure. As shown in the Figure A.3-2,
the reconnect attempt takes approximately 1.76 ms/channel. The HID moves through its channel
subset up to 19 times before it times out and exits Reconnect Mode. The keyboard tries to send the
data for up to 5 seconds, and the mouse tries for 2 seconds, causing the HID to re-enter Reconnect
Mode multiple times if necessary.
