AT43USB355M-AC ATMEL [ATMEL Corporation], AT43USB355M-AC Datasheet - Page 36

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

36
AT43USB355
Suspend/Resume Interrupt Enable Register – SPRSIE
• Bit 7..4 – Res: Reserved Bits
These bits are reserved and are always read as zeros.
• Bit 3 – BUS INT EN: USB Reset Interrupt Enable
When the BUS INT EN bit is set, the USB and microcontroller resets are separated. A USB
bus reset (SE0 for longer than 3 ms) will reset the USB hardware only and not the microcon-
troller. However, an interrupt to the microcontroller will be generated and bit 3 of SPRSR is
set.
• Bit 2 – FRWUP IE: Function Remote Wakeup Interrupt Enable
Setting the FRWUP IE bit will initiate an interrupt whenever the FRWUP bit of SPRSR is set.
• Bit 1 – RSM IE: Resume Interrupt Enable
Setting the RSM IE bit will initiate an interrupt whenever the RSM bit of SPRSR is set.
• Bit 0 – GLB SUSP IE: Global Suspend Interrupt Enable
Setting the GLB SUSP IE bit will initiate an interrupt whenever the GLB SUSP bit of SPRSR is
set.
Suspend/Resume Interrupt Mask Register – SPRSMSK
The bits of the Suspend/Resume Mask Register are used to make an interrupt caused by an
event in the Suspend/Resume Register visible to the microcontroller. The Suspend/Resume
Interrupt Enable Register bits enable the interrupt while the Suspend/Resume Interrupt Mask
Register allows the microcontroller to control when it wants visibility to an interrupt. 1 = Enable
Mask, 0 = Disable Mask.
• Bit 7..4 – Res: Reserved Bits
These bits are reserved and are always read as zeros.
• Bit 3 – BUS INT MSK: USB Reset Interrupt Mask
• Bit 2 – FRWUP MSK: Function Remote Wakeup Interrupt Mask
• Bit 1 – RSM MSK: Resume Interrupt Mask
• Bit 0 – GLB SUSP MSK: Global Suspend Interrupt Enable
Initial Value
Read/Write
Initial Value
Read/Write
$1FF9
$1FF8
Bit
Bit
R
7
–
0
R
7
–
0
R
6
–
0
R
6
–
0
R
5
–
0
R
5
–
0
R
4
–
0
R
4
–
0
BUS INT MSK
W
3
0
BUS INT
R/W
3
0
FRWUP MSK
FRWUP
W
2
0
R
2
0
RSM
RSM
W
1
0
R
1
0
GLB SUSP
GLB SUSP
W
0
0
R
0
0
2603G–USB–04/06
SPRSMSK
SPRSIE