atmega32u4-16mu ATMEL Corporation, atmega32u4-16mu Datasheet - Page 299

• Manufacturer Part Number: atmega32u4-16mu
• Description: Atmega32u4 8-bit Avr Microcontroller With 32k Bytes Of Isp Flash And Usb Controller
• Manufacturer: ATMEL Corporation

7766A–AVR–03/08
Set to enable the EORSTI interrupt. This bit is set after a reset.
Clear to disable the EORSTI interrupt.
• 2 - SOFE - Start Of Frame Interrupt Enable Bit
Set to enable the SOFI interrupt.
Clear to disable the SOFI interrupt.
• 1 - Reserved
The value read from this bits is always 0. Do not set this bit
• 0 - SUSPE - Suspend Interrupt Enable Bit
Set to enable the SUSPI interrupt.
Clear to disable the SUSPI interrupt.
• 7 - ADDEN - Address Enable Bit
Set to activate the UADD (USB address).
Cleared by hardware. Clearing by software has no effect.
See Section 23.7, page 287 for more details.
• 6-0 - UADD6:0 - USB Address Bits
Load by software to configure the device address.
.
• 7-3 - Reserved
The value read from these bits is always 0. Do not set these bits.
• 2-0 - FNUM10:8 - Frame Number Upper Value
Set by hardware. These bits are the 3 MSB of the 11-bits Frame Number information. They are
provided in the last received SOF packet. FNUM is updated if a corrupted SOF is received.
Bit
Read/Write
Initial Val-
ue
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
ADDEN
W
7
0
R
R
7
0
7
0
-
R/W
R
6
0
6
0
R
-
6
0
R/W
R
5
0
-
R
5
0
5
0
R/W
R
4
0
-
R
4
0
4
0
FNUM7:0
UADD6:0
R/W
3
R
0
-
R
3
0
3
0
R/W
R
2
0
R
2
0
2
0
FNUM10:8
ATmega32U4
R/W
R
1
0
R
1
0
1
0
R/W
R
0
0
R
0
0
0
0
UDFNUMH
UDFNUML
UDADDR
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