at43usb355 ATMEL Corporation, at43usb355 Datasheet - Page 31

• Manufacturer Part Number: at43usb355
• Description: At43usb355 Full-speed Usb Microcontroller With Embedded Hub, Adc And Pwm
• Manufacturer: ATMEL Corporation

USB Interrupt
Sources
2603G–USB–04/06
The USB interrupts are described below.
Table 9. USB Interrupt Sources
All interrupts have individual enable, status, and mask bits through the interrupt enable regis-
ter and interrupt mask register. The Suspend and Resume interrupts are cleared by writing a 0
to the particular interrupt bit. All other interrupts are cleared when the microcontroller sets a bit
in an interrupt acknowledge register.
Interrupt
SOF Received
EOF2
Function EP0 Interrupt
Function EP1 Interrupt
Function EP2 Interrupt
Function EP3 Interrupt
Hub EP0 Interrupt
FRWUP
GLB SUSP
RSM
BUS RESET
For an OUT end-point it indicates that Function End-point 1 has
For an OUT end-point it indicates that Function End-point 2 has
For an OUT end-point it indicates that Function End-point 3 has
See “Control Transfers at Control End-point EP0” on page 75 for
USB hardware has received a embedded function remote wakeup
USB hardware has received global suspend signaling and is
Description
Whenever USB hardware decodes a valid Start of Frame. The
frame number is stored in the two Frame Number Registers.
Activated whenever the hub's frame timer reaches its EOF2 time
point.
See “Control Transfers at Control End-point EP0” on page 75 for
details.
received a valid OUT packet and that the data is in the FIFO. For
an IN end-point it means that the end-point has received an IN
token, sent out the data in the FIFO and received an ACK from the
Host. The FIFO is now ready to be written by new data from the
microcontroller.
received a valid OUT packet and that the data is in the FIFO. For
an IN end-point it means that the end-point has received an IN
token, sent out the data in the FIFO and received an ACK from the
Host. The FIFO is now ready to be written by new data from the
microcontroller.
received a valid OUT packet and that the data is in the FIFO. For
an IN end-point it means that the end-point has received an IN
token, sent out the data in the FIFO and received an ACK from the
Host. The FIFO is now ready to be written by new data from the
microcontroller.
details.
request.
preparing to put the hub in the suspend mode. The
microcontroller's firmware should place the embedded function in
the suspend state.
USB hardware received resume signaling and is propagating the
resume signaling. The microcontroller's firmware should take the
embedded function out of the suspended state.
USB hardware received a USB bus reset. This applies only in
cases where a separation between USB bus reset and
microcontroller reset is required. Be very careful when using this
feature.
AT43USB355
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