NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 146 -
Revision V1.30
NUC97
0
T
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CHNIC
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NUA
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UART Clock Divider
5.3.3.14
APLLFout
UART
X
_SDIV
(CLK_DIVCTLm)
UART
X
_N
(CLK_DIVCTLm)
UART
X
_SrcCLK
ECLK
UARTx
UARTx
(CLK_PCLKEN0[x+16])
ACLKOut
UCLKout
CLK_SW4
(4-to-1)
(MUX)
CLK_DIVn
(÷ (UART
X
_N+1))
UPLLFout
UART
X
_S
(CLK_DIVCTLm)
XT1_IN
CLK_DIVn
(÷ (UART
X
_SDIV+1))
CLK_DIVn
(÷ (UART
X
_SDIV+1))
x = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
m = 4, 5, 6
Note:
Before clock switching, both the pre-selected and
newly selected clock sources must be turned on and stable.
Figure 5.3-14 UART Clock Divider Block Diagram
USB 1.1 Host 48 MHz Clock Divider
5.3.3.15
USBPHY0_480M
USB11_SrcCLK
USB_CLK
48MZ
USBH
(CLK_HCLKEN[18])
CLK_SW2
(2-to-1)
(MUX)
CLK_DIVn
(÷ 10)
USBPHY1_480M
USBID
(SYS_PWRON[16])
Note:
Before clock switching, both the pre-selected and
newly selected clock sources must be turned on and stable.
Figure 5.3-15 USB 1.1 Host Controller 48 MHz Clock Divider Block Diagram
Watchdog Timer Clock Divider
5.3.3.16
WDT_SrcCLK
ECLK
WDT
WDT
(CLK_PCLKEN0[0])
CLK_SW4
(4-to-1)
(MUX)
WDT_S
(CLK_DIVCTL8[9:8])
XT1_IN (12 MHz)
X32_IN (32.768 kHz)
XT1_IN/128
PCLK/4096
Note:
Before clock switching, both the pre-selected and
newly selected clock sources must be turned on and stable.
Figure 5.3-16 Watchdog Timer Clock Divider Block Diagram