WirelessUSB™ Protocol 2.2

Figure 2-7. Reconnect Timing Diagram

Bridge

Inherence detected .

Move to a quieter channel in the subset

Quiet channel found. Bridge will stay on this channel

Device

Keyboard = 5 seconds; Mouse = 2 seconds

430 ms

Device lost connection .

Reconnect

Reconnect

Reconnect

Reconnect

Search for bridge in

Mode

Mode

Mode

Mode

the channel subset

 

 

 

 

22.88 ms x 19 Cycles ~ 430 ms

22.88 ms

Cycle 1

Cycle 2

Cycle 3

Cycle 19

1.76 ms x 13 Channels = 22.88 ms

1.76 ms

1.76 ms

1.76 ms

 

1st Channel

2nd Channel

3th Channel

13th Channel

in subset

in subset

in subset

in subset

2.5Signature Byte

The PRoC LP RDK uses the Signature byte to determine if the HID has ever been bound to any bridge before.

If the HID has never bound to a bridge, the non-volatile memory used to store the signature and the bridge's MID data remains in its default value. Once the HID has bound to a bridge, the Signature byte is set to 0x90 and the bridge's MID is also stored.

At power up, the HID reads the Signature and the MID bytes to determine its next action. If the Sig- nature byte is 0x90, the HID uses the retrieved MID to calculate the networkID and moves to Re- connect mode. If the Signature byte is not 0x90, the HID goes to sleep, waiting for the user to initiate the bind process.

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CY4672 Reference Design Guide, Document # 001-16968 Revision **

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Cypress CY4672 manual Signature Byte, Device