NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 182 -
Revision V1.30
NUC97
0
T
E
CHNIC
A
L
RE
F
E
RE
N
CE
MA
NUA
L
[4:3]
SDH_S
SD Host Engine Clock Source Selection
This field selects which clock is used to be the source of engine clock for SD host controller.
00 = SDH_SrcCLK is from XIN.
01 = Reserved.
10 = SDH_SrcCLK is from ACLKOut.
11 = SDH_SrcCLK is from UCLKOut.
[2:0]
SDH_SDIV
SD Host 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 SDH_S (CLK_DIVCTL9[4:3
]) is 2’b10 (APLL) or 2’b11 (UPLL).
If SDH_S (CLK_DIVCTL9[4:3
]) is 2’b10,
ACLKOut = APLLFout ÷ (SD 1).
If SDH_S (CLK_DIVCTL9[4:3
]) is 2’b11,
UCLKOut = UPLLFout ÷ (SD 1).