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www.fairchildsemi.com

FUSB302

• Rev. 2

8

www.onsemi.com

The high level software flow diagram for a Type-C Host (SRC) is shown below in Figure 10.

Disabled:

FUSB302 in low power

mode looking for an attach

Unattached.SRC:

Host software enables

FUSB302 pull-ups and

measure block to detect

attach

FUSB302 I_TOGDONE

interrupt alerts host

software that something

has attached.

Attached.SRC

Host software configures

FUSB302 based on insertion

orientation and enables VBUS

and VCONN

AudioAccessory

DebugAccessory

Host software utilizes I_COMP and

I_BC_LVL interrupts to determine an

attach and what type of port is

attached.

FUSB302 I_COMP interrupt alerts

host software that a detach has

occurred

FUSB302 I_COMP and I_VBUSOK

interrupts alert host software that a

accessory detach has occurred

Figure 10.

SRC Software Flow