User manual
...the world's most energy friendly microcontrollers
2012-04-24 - Giant Gecko Family - d0053_Rev0.96 352
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15.6.2 USB_STATUS - System Status Register
Offset Bit Position
0x004
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reset
0
Access
R
Name
VREGOS
Bit Name Reset Access Description
31:1 Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
0 VREGOS 0 R VREGO Sense Output
USB_VREGO Voltage Sense output. 0 when no USB_VREGO voltage, 1 when USB_VREGO above approximately 1.8 V. Always
0 when VREGOSEN in USB_CTRL is 0.
15.6.3 USB_IF - Interrupt Flag Register
Offset Bit Position
0x008
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reset
1
1
Access
R
R
Name
VREGOSL
VREGOSH
Bit Name Reset Access Description
31:2 Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
1 VREGOSL 1 R VREGO Sense Low Interrupt Flag
Set when USB_VREGO drops below approximately 1.8 V.
0 VREGOSH 1 R VREGO Sense High Interrupt Flag
Set when USB_VREGO goes above approximately 1.8 V.
15.6.4 USB_IFS - Interrupt Flag Set Register
Offset Bit Position
0x00C
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reset
0
0
Access
W1
W1
Name
VREGOSL
VREGOSH
Bit Name Reset Access Description
31:2 Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)