Datasheet

103

32142D–06/2013

ATUC64/128/256L3/4U

8.7.1.2 General Status Register

Access Type: Read-Only

Offset: 0x0804

Reset Value: 0x00000000

• CLKUSABLE: Generic Clock Usable

This bit is cleared when the USB generic clock is not usable.

This bit is set when the USB generic clock (that should be 48 Mhz) is usable.

• SPEED: Speed Status

This field is set according to the controller speed mode.

31 30 29 28 27 26 25 24

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23 22 21 20 19 18 17 16

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15 14 13 12 11 10 9 8

- CLKUSABLE SPEED - - - -

76543210

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SPEED Speed Status

00 full-speed mode

01 Reserved

10 low-speed mode

11 Reserved