Atmel Xplained Pro Evaluation Kit for the ATSAMD21J18A Microcontroller ATSAMD21-XPRO ATSAMD21-XPRO Fiche De Données
Codes de produits
ATSAMD21-XPRO
800
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181C–SAM-D21_Datasheet–07/2014
31.8.5.3 Status Register
Name:
STATUS
Offset:
0x0C
Reset:
0x0000
Property:
Read only
z
Bits 7:6 – LINESTATE: USB Line State Status
These bits define the current line state DP/DM.
These bits define the current line state DP/DM.
Table 31-20. Line State
z
Bits 5:4 – Reserved
These bits are unused and reserved for future use. For compatibility with future devices, always write these bits to
zero when this register is written. These bits will always return zero when read.
These bits are unused and reserved for future use. For compatibility with future devices, always write these bits to
zero when this register is written. These bits will always return zero when read.
z
Bits 3:2 – SPEED[1:0]: Speed Status
These bits define the current speed used by the host.
These bits define the current speed used by the host.
z
Bits 1:0 – Reserved
These bits are unused and reserved for future use. For compatibility with future devices, always write these bits to
zero when this register is written. These bits will always return zero when read.
These bits are unused and reserved for future use. For compatibility with future devices, always write these bits to
zero when this register is written. These bits will always return zero when read.
Bit
7
6
5
4
3
2
1
0
LINESTATE[1:0]
SPEED[1:0]
Access
R
R
R
R
R
R
R
R
Reset
0
0
0
0
0
0
0
0
LINESTATE[1:0]
USB Line Status
0x0
SE0/RESET
0x1
FS-J or LS-K State
0x2
FS-K or LS-J State
Table 31-21. Speed Status
SPEED[1:0]
Speed Status
0x0
Full-speed mode
0x1
Reserved
0x2
Low-speed mode
0x3
Reserved