AT43USB326-AC Atmel, AT43USB326-AC Datasheet - Page 28

• Manufacturer Part Number: AT43USB326-AC
• Description: IC USB KEYBOARD CTRLR HUB 48LQFP
• Manufacturer: Atmel
• Series: AVR®r

Specifications of AT43USB326-AC

• Applications: Keyboard Controller
• Core Processor: AVR
• Program Memory Type: Mask ROM (16 kB)
• Controller Series: AT43USB
• Ram Size: 512 x 8
• Interface: USB
• Number Of I /o: 32
• Voltage - Supply: 4.4 V ~ 5.25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

USB Interrupt
Sources
28
AT43USB326
The USB interrupts are described below.
Table 8. 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
Hub EP0 Interrupt
FRWUP
GLB SUSP
RSM
Description
Activated whenever the hub's frame timer reaches its EOF2 time
For an OUT endpoint it indicates that Function Endpoint 1 has
For an OUT endpoint it indicates that Function Endpoint 2 has
See “Control Transfers at Control Endpoint EP0” on page 47 for
USB hardware has received a embedded function remote wakeup
USB hardware has received global suspend signaling and is
USB hardware received resume signaling and is propagating the
Whenever USB hardware decodes a valid Start of Frame. The
frame number is stored in the two Frame Number Registers.
point.
See “Control Transfers at Control Endpoint EP0” on page 47 for
details.
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.
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.
details.
request.
preparing to put the hub in the suspend mode. The
microcontroller's firmware should place the embedded function in
the suspend state.
resume signaling. The microcontroller's firmware should take the
embedded function out of the suspended state.
3313D–USB–04/06