Data Sheet

Atmel | SMART SAM D21 [DATASHEET]

Atmel-42181G–SAM-D21_Datasheet–09/2015

z Bits 3:2 – SPDCONF: Speed Configuration for Host

These bits select the host speed configuration as shown below

z Bit 1 – RESUME: Send USB Resume

Writing 0 to this bit has no effect.

1: Generates a USB Resume on the USB bus.

This bit is cleared when the USB Resume has been sent or when a USB reset is requested.

z Bit 0 – 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.

Table 31-18. SPDCONF Selection

SPDCONF[1:0] Description

0x0 Low and Full Speed capable

0x1 Reserved

0x2 Reserved

0x3 Reserved