NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 742 -
Revision V1.30
NUC97
0
T
E
CHNIC
A
L
RE
F
E
RE
N
CE
MA
NUA
L
USB PHY 0 Control Register (USBPCR0)
Register
Offset
R/W
Description
Reset Value
USBPCR0
0x0C4
R/W
USB PHY 0 Control Register
0x0000_0060
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
Reserved
CLKVALID
Reserved
SUSPEND
7
6
5
4
3
2
1
0
Reserved
Bits
Description
[31:12]
Reserved
Reserved.
[11]
CLKVALID
UTMI Clock Valid
This bit is a flag to indicate if the UTMI clock from USB 2.0 PHY is ready. S/W program
must prevent to write other control registers before this UTMI clock valid flag is active.
0 = UTMI clock is not valid.
1 = UTMI clock is valid.
[10:9]
Reserved
Reserved.
[8]
SUSPEND
Suspend Assertion
This bit controls the suspend mode of USB PHY 0.
While PHY was suspended, all circuits of PHY were powered down and outputs are
tristated.
Th
is bit is 1’b0 in default. This means the USB PHY 0 is suspended in default. It is
necessary to set this bit 1’b1 to make USB PHY 0 leave suspend mode before doing
configuration of USB host.
0 = USB PHY 0 was suspended.
1 = USB PHY 0 was not suspended.
[7:0]
Reserved
Reserved.