Texas Instruments TMS320DM357 - Manual (Page 25)

Read interrupt
status register
Resume
interrupt
?
Resume routine
Yes
No
A
device or
B device
?
SESSREQ
interrupt
?
No
Vbus
error interrupt
?
Yes
Yes
A device B device
Session req
routine
routine
Vbus error
?
Host
or peripheral
Peripheral Host
?
Connect
interrupt Connect
routine
Yes
routine
Babble
?
Yes Babble
interrupt
EP0 Yes Host EP0
routine interrupt
?
No
No
No
No
Host Rx
routine
Yes
interrupt
?
Receive
Host Tx
routine
?
No
Yes Transmit
interrupt
interrupt
?
EP0 Yes Peripheral
EP0 routine
No
interrupt
?
Receive
No
Rx routine
Peripheral Yes
Transmit
interrupt
?
Tx routine
Peripheral Yes
interrupt
?
SOF
routine
Resume Yes
interrupt
?
Disconn Disconnect Yes
routine
Suspend
interrupt
?
Suspend Yes
routine
www.ti.com USB Controller Host and Peripheral Modes Operation
Figure 2. Interrupt Service Routine Flow Chart
SPRUGH3 – November 2008 Universal Serial Bus (USB) Controller 25
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