ISD94100 Series Technical Reference Manual
Sep 9, 2019
Page
175
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Rev1.09
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ICA
L
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F
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NCE
M
AN
U
AL
Clock Frequency Detector Lower Boundary Register
(CLK_CDLOWB)
Register
Offset
R/W Description
Reset Value
CLK_CDLOWB
0x7C
R/W
Clock Frequency Range Detector Lower Boundary
Register
0x0000_0000
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
LOWERBD
7
6
5
4
3
2
1
0
LOWERBD
Bits
Description
[31:10]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write with
reset value.
[9:0]
LOWERBD
HXT Clock Frequency Range Detector Lower Boundary Value
The bits define the minimum value of frequency range detector window.
The HXT detected frequency value is 512 * (the frequency of HXT / the frequency of HIRC)
If the HXT detected frequency value lower than this minimum frequency value (LOWERBD),
the HXT Clock Frequency Range Detector Interrupt Flag (HXTFQIF(CLK_CLKDSTS[8])) will
set to 1.
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