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NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 166 -
Revision V1.30
NUC97
0
T
E
CHNIC
A
L
RE
F
E
RE
N
CE
MA
NUA
L
Clock Divider Control Register 2 (CLK_DIVCTL2)
Register
Offset
R/W
Description
Reset Value
CLK_DIVCTL2
0x028
R/W
Clock Divider Control Register 2
0x0000_0000
31
30
29
28
27
26
25
24
Reserved
GE2D_N
Reserved
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
Reserved
USB_N
7
6
5
4
3
2
1
0
Reserved
USB_S
Reserved
Bits
Description
[31:30]
Reserved
Reserved.
[29:28]
GE2D_N
GE2D Engine Clock Divider
This field defines the clock divide number for clock divider to generate the engine clock for GE2D
codec.
The actual clock divide number is ( 1). So,
ECLKge2d = HCLK3 / ( 1).
[27:12]
Reserved
Reserved.
[11:8]
USB_N
USB 1.1 Host Controller Engine Clock Divider
This field defines the clock divide number for clock divider to generate the 48MHz clock for USB
1.1 host controller.
The actual clock divide number is (USB_N + 1). So,
USB_CLK = USB11_SrcCLK / (USB_N + 1).
Note:
The USB_CLK must be 48MHz.
[7:5]
Reserved
Reserved.
[4:3]
USB_S
USB 1.1 Engine Clock Source Selection
This field selects which clock is used to be the source of 48MHz clock for USB 1.1 host
controller.
00 = Reserved.
01 = Reserved.
10 = USB11_SrcCLK is from 480 MHz outputted by USB PHY 0.
11 = USB11_SrcCLK is from 480 MHz outputted by USB PHY 1.
[2:0]
Reserved
Reserved.