AT43USB355M-AC ATMEL [ATMEL Corporation], AT43USB355M-AC Datasheet - Page 34

• Manufacturer Part Number: AT43USB355M-AC
• Description: Full-speed USB Microcontroller with Embedded Hub, ADC and PWM
• Manufacturer: ATMEL [ATMEL Corporation]

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AT43USB355
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 – Res: Reserved bit
This bit is reserved and is always read as zero.
• Bit 4 – FEP3 INTACK: Function End-point 3 Interrupt Acknowledge
The microcontroller firmware writes a 1 to this bit to clear the FEP3 INT bit.
• Bit 3 – HEP0 INTACK: Hub End-point 0 Interrupt Acknowledge
The microcontroller firmware writes a 1 to this bit to clear the HEP0 INT bit.
• Bit 2 – FEP2 INTACK: Function End-point 2 Interrupt Acknowledge
The microcontroller firmware writes a 1 to this bit to clear the FEP2 bit.
• Bit 1 – FEP1 INTACK: Function End-point 1 Interrupt Acknowledge
The microcontroller firmware writes a 1 to this bit to clear the FEP1 bit.
• Bit 0 – FEP0 INTACK: Function End-point 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
R
5
–
0
FEP3 INTACK
W
4
0
HEP0 INTACK
W
3
0
FEP2 IMSK
W
2
0
FEP1 INTACK
W
1
0
FEP0 INTACK
2603G–USB–04/06
W
0
0
UIAR