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System and Peripheral Control Registers
181
SPNU563A–March 2018
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Architecture
Table 2-49. LPO/Clock Monitor Control Register (LPOMONCTL) Field Descriptions (continued)
Bit Field Value Description
12-8 HFTRIM High-frequency oscillator trim value. This four-bit value is used to center the HF
oscillator's frequency.
Caution: This value should only be changed when the HF oscillator is not the
source for a clock domain, otherwise a system failure could result.
The following values are the ratio: f / fo in the F021 process.
0 29.52
1h 34.24%
2h 38.85%
3h 43.45%
4h 47.99%
5h 52.55%
6h 57.02%
7h 61.46%
8h 65.92%
9h 70.17
Ah 74.55%
Bh 78.92%
Ch 83.17%
Dh 87.43%
Eh 91.75%
Fh 95.89%
10h 100.00% Default at Reset.
11h 104.09
12h 108.17
13h 112.32
14h 116.41
15h 120.67
16h 124.42
17h 128.38
18h 132.24
19h 136.15
1Ah 140.15
1Bh 143.94
1Ch 148.02
1Dh 151.80x
1Eh 155.50x
1Fh 159.35%
7-5 Reserved 0 Reads return 0. Writes have no effect.
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