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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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SH33F2801P/032PR 데이터시트(PDF) 69 Page - SINOWEALTH Electronic Ltd |
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SH33F2801P/032PR 데이터시트(HTML) 69 Page - SINOWEALTH Electronic Ltd |
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69 / 407 page  SH33F2801 69 10.3.12 HSI Oscillator Calibration Register (RCC_HSICAL) Offset Address: 0x0034 Reset Value: 0xXXXX XX00 b31 b30 b29 b28 b27 b26 b25 b24 b23 b22 b21 b20 b19 b18 b17 b16 TRIMR UN Reserved TRIMREF[12:0] RW - RO 0 0 0 X X X X X X X X X X X X X b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 HSICAL[7:0] Reserved HSITRIM[2:0] RO - RW X X X X X X X X 0 0 0 0 0 0 0 0 Bit Symbol Description 31 TRIMRUN HSI user adjustment switch, can only be set to 1 by software, and cleared by hardware or software 0: The operation has ended or not started 1: Start HSI ADJ, the flag is 1 during the calculation, and the flag is cleared by hardware after the calculation is completed. Note: Allowing clearing RUN during the calculation to force the calculation to end. 30 ~ 29 Reserved - 28 ~ 16 TRIMREF[12:0] HSI user calibration parameter value After the RUN operation is completed, the user can read the HSI user calibration parameter value from this register. (HSI count HSE division source) 15 ~ 8 HSICAL[7:0] Internal high frequency RC oscillator calibration These bits are automatically initialized at system startup 7 ~ 3 Reserved - 2 ~ 0 HSITRIM[2:0] Internal high frequency RC oscillator adjustment Write by software to adjust the HSI frequency, which are superimposed on the HSICAL[7:0] value. These bits are based on HSICAL[7:0], allowing the user to enter an adjustment value to adjust the frequency of the internal HSI RC oscillator based on voltage and temperature changes. 000: +0 (default) 001: +0.25% 010: +0.5% 011: +0.75% 100: -1% 101: -0.75% 110: -0.5% 111: -0.25% |
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