Cypress CY4672 manual Contents

Contents

1. Introduction			9
1.1	Scope	...........................................................................................................................	9
1.2	Chapter Overviews		9
1.3	Support		9
1.4	Conventions		10
	1.4.1	Definitions	10
	1.4.2	Acronyms	10

2. WirelessUSB™ Protocol 2.2			13
2.1	General Overview		13
	2.1.1	Radio Channel Management	13
	2.1.2	Pseudo Noise Codes	13
	2.1.3	Chip Error Correction	14
	2.1.4	Automatic Acknowledgment (AutoACK)	14
	2.1.5	Network ID	14
	2.1.6	Manufacturing ID	14
	2.1.7	Channel Selection Algorithm	15
2.2	Protocol Modes		15
	2.2.1 Ping Mode (Bridge Only)		16
	2.2.2 Idle Mode (HID only)		17
	2.2.3 Reconnect Mode (HID only)		17
	2.2.4	Button Bind Mode	17
	2.2.5	Enhanced KISSBind™	18
	2.2.6	Unbind	20
	2.2.7	Data Mode	20
	2.2.8 Back Channel Data Support		20
	2.2.9 Dynamic Data Rate and Dynamic PA		22
2.3	Packet Structures		23
	2.3.1 Bind/KISSBind Request Packet (HID)		23
	2.3.2 Bind Response Packet (Bridge)		24
	2.3.3	Connect Request (HID)	24
	2.3.4 Connect Response Packet (Bridge)		24
	2.3.5	Ping Packet (Bridge)	25
	2.3.6 Data Packet/Back Channel Data Packet (Bridge and HID)		25
2.4 Bind and Reconnect Timing			26
2.5	Signature Byte		28
2.6	Encryption		29
	2.6.1	TEA Encryption	29
		2.6.1.1 TEA Key Management over WirelessUSB	29
	2.6.2	AES Encryption	30
		2.6.2.1 AES Key Management	31
	2.6.3 Encryption and Power Consumption Trade Off		31
CY4672 Reference Design Guide, Document # 001-16968 Revision **			3

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