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NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 173 -
Revision V1.30
NUC97
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CHNIC
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NUA
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[20:19]
UART6_S
UART6 Engine Clock Source Selection
This field selects which clock is used to be the source of engine clock for UART6 controller.
00 = UART6_SrcCLK is from XIN.
01 = Reserved.
10 = UART6_SrcCLK is from ACLKOut.
11 = UART6_SrcCLK is from UCLKOut.
[18:16]
UART6_SDIV
UART6 Engine Source Clock Divider
This field defines the source clock divide number for clock divider of APLL and UPLL output. This
field only takes effect while the UART6_S (CLK_DIVCTL5[20:19
]) is 2’b10 (APLL) or 2’b11
(UPLL).
If UART6_S (CLK_DIVCTL5[20:19
]) is 2’b10,
ACLKOut = APLLFout ÷ (UART 1).
If UART6_S (CLK_DIVCTL5[20:19]) is 2
’b11,
UCLKOut = UPLLFout ÷ (UART 1).
[15:13]
UART5_N
UART5 Engine Clock Divider
This field defines the clock divide number for clock divider to generate the engine clock for
UART5.
The actual clock divide number is (U 1). So,
ECLKuart5 = UART5_SrcCLK / (U 1).
[12:11]
UART5_S
UART5 Engine Clock Source Selection
This field selects which clock is used to be the source of engine clock for UART5 controller.
00 = UART5_SrcCLK is from XIN.
01 = Reserved.
10 = UART5_SrcCLK is from ACLKOut.
11 = UART5_SrcCLK is from UCLKOut.
[10:8]
UART5_SDIV
UART5 Engine Source Clock Divider
This field defines the source clock divide number for clock divider of APLL and UPLL output. This
field only takes effect while the UART5_S (CLK_DIVCTL5[12:11
]) is 2’b10 (APLL) or 2’b11
(UPLL).
If UART5_S (CLK_DIVCTL5[12:11
]) is 2’b10,
ACLKOut = APLLFout ÷ (UART 1).
If UART5_S (CLK_DIVCTL5[12:11
]) is 2’b11,
UCLKOut = UPLLFout ÷ (UART 1).
[7:5]
UART4_N
UART4 Engine Clock Divider
This field defines the clock divide number for clock divider to generate the engine clock for
UART4.
The actual clock divide number is (U 1). So,
ECLKuart4 = UART4_SrcCLK / (U 1).
[4:3]
UART4_S
UART4 Engine Clock Source Selection
This field selects which clock is used to be the source of engine clock for UART4 controller.
00 = UART4_SrcCLK is from XIN.
01 = Reserved.
10 = UART4_SrcCLK is from ACLKOut.
11 = UART4_SrcCLK is from UCLKOut.