Atmel Xplained Pro Evaluation Kit for the ATSAMD21J18A Microcontroller ATSAMD21-XPRO ATSAMD21-XPRO Data Sheet
Product codes
ATSAMD21-XPRO
764
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181C–SAM-D21_Datasheet–07/2014
31.8.1.4 Finite State Machine Status
Name:
FSMSTATUS
Offset:
0x0D
Reset:
0xXXXX
Property:
Read only
z
Bits 7 – Reserved
This bit is unused and reserved for future use. For compatibility with future devices, always write this bit to zero
when this register is written. This bit will always return zero when read.
This bit is unused and reserved for future use. For compatibility with future devices, always write this bit to zero
when this register is written. This bit will always return zero when read.
z
Bits 6:0 – FSMSTATE[6:0]: Fine State Machine Status
These bits indicate the state of the finite state machine of the USB controller.
These bits indicate the state of the finite state machine of the USB controller.
Bit
7
6
5
4
3
2
1
0
FSMSTATE[6:0]
Access
R
R
R
R
R
R
R
R
Reset
0
0
0
0
0
0
0
1
FSMSTATE[6:0]
Description
0x01
OFF (L3). Corresponds to the powered-off, disconnected, and disabled state
0x02
ON (L0). Corresponds to the Idle and Active states
0x04
SUSPEND (L2)
0x08
SLEEP (L1)
0x10
DNRESUME. Down Stream Resume.
0x20
UPRESUME. Up Stream Resume.
0x40
RESET. USB lines Reset.
Others
Reserved