Freescale Semiconductor TWR-MCF52259-Ethenet manual On-the-Go

On-the-Go

USB On-the-Go:Initial declaration

When using A and B plugs, initially the device using the A plug is declared the host and the one using the B plug is declared the device. When using the mini-AB receptacle the ID plug pin declares the initial state of a device as host or device. State is then changed during host negotiations protocol by turning a pull-up resistor on and off.

Appendix A USB

A-device

	VBUS
Dual-role	D-
Device	D+
	ID
	GND

Default Host

	TM
Mini-AB receptacle			B-device
		VBUS
		D-	Dual-role
		D+	Device
		ID
		GND
Mini-A plug	Mini-B plug	Default Peripheral