Data Sheet

782
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
31.8.2.3 Status
Name:
STATUS
Offset: 0x0C
Reset: 0x0000
Property: -
z Bits 7:6 – LINESTATE[1:0]: USB Line State Status
These bits define the current line state DP/DM as showed in Table 31-12.
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.
z Bits 3:2 – SPEED [1:0]: Speed Status
These bits define the current speed used of the device
.
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.
Bit76543210
LINESTATE[1:0] SPEED[1:0]
AccessRRRRRRRR
Reset01000100
Table 31-12. USB Line State Status
LINESTATE[1:0] USB Line Status
0x0 SE0/RESET
0x1 FS-J or LS-K State
0x2 FS-K or LS-J State
Table 31-13. Speed Status
SPEED[1:0] SPEED STATUS
0x0 Low-speed mode
0x1 Full-speed mode
0x2 Reserved
0x3 Reserved