at43usb320a ATMEL Corporation, at43usb320a Datasheet - Page 33

• Manufacturer Part Number: at43usb320a
• Description: Full-speed Usb Microcontroller With An Embedded Hub
• Manufacturer: ATMEL Corporation

1443E–USB–4/04
USB Interrupt Acknowledge Register – UIAR
• Bit 7 – SOF INTACK: Start of Frame Interrupt Acknowledge
The microcontroller firmware writes a 1 to this bit to clear the SOF INT bit.
• Bit 6 – EOF2 INTACK: EOF2 Interrupt Acknowledge
The microcontroller firmware writes a 1 to this bit to clear the EOF2 INT bit.
• Bit 5, 4 – Res: Reserved bits
These bits are reserved and always read as zero.
• Bit 3 – HEP0 INTACK: Hub Endpoint 0 Interrupt Acknowledge
The microcontroller firmware writes a 1 to this bit to clear the HEP0 INT bit.
• Bit 2 – FEP2 INTACK: Function Endpoint 2 Interrupt Acknowledge
The microcontroller firmware writes a 1 to this bit to clear the FEP2 bit.
• Bit 1 – FEP1 INTACK: Function Endpoint 1 Interrupt Acknowledge
The microcontroller firmware writes a 1 to this bit to clear the FEP1 bit.
• Bit 0 – FEP0 INTACK: Function Endpoint 0 Interrupt Acknowledge
The microcontroller firmware writes a 1 to this bit to clear the FEP0 INT bit.
Read/Write
Initial Value
$1FF5
Bit
SOF INTACK
W
7
0
EOF2 INTACK
W
6
0
5
–
R
0
W
4
–
0
HEP0 INTACK
W
3
0
FEP2 IMSK
W
2
0
AT43USB320A
FEP1 INTACK
W
1
0
FEP0 INTACK
W
0
0
UIAR
33