AT43USB325E-AC Atmel, AT43USB325E-AC Datasheet - Page 31

• Manufacturer Part Number: AT43USB325E-AC
• Description: IC USB KEYBOARD CTRLR HUB 64LQFP
• Manufacturer: Atmel
• Series: AVR®r

Specifications of AT43USB325E-AC

• Applications: Keyboard Controller
• Core Processor: AVR
• Program Memory Type: SRAM (16 kB)
• Controller Series: AT43USB
• Ram Size: 512 x 8
• Interface: SPI, 3-Wire Serial
• Number Of I /o: 42
• Voltage - Supply: 4.4 V ~ 5.25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

4.12
3355C–USB–4/05
USB Interrupt Sources
The USB interrupts are described below.
Table 4-3.
All interrupts have individual enable, status, and mask bits through the interrupt enable register
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
USB Interrupt Sources
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
details.
For an OUT endpoint it indicates that Function Endpoint 1 has
received a valid OUT packet and that the data is in the FIFO. For
an IN endpoint it means that the endpoint 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.
For an OUT endpoint it indicates that Function Endpoint 2 has
received a valid OUT packet and that the data is in the FIFO. For
an IN endpoint it means that the endpoint 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.
For an OUT end-point it indicates that Function End-point 3 has
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.
See
details.
USB hardware has received a embedded function remote wakeup
request.
USB hardware has received global suspend signaling and is
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.
“Control Transfers at Control End-point EP0” on page 64
“Control Transfers at Control End-point EP0” on page 64
AT43USB325
for
for
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