ST7FOXU0 datasheet(38/123 Pages) STMICROELECTRONICS

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ST7FOXU0 Arkusz danych(PDF) 38 Page - STMicroelectronics

Numer części	ST7FOXU0

Szczegółowy opis	1 additional output line

PDF	123 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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38 / 123 page

Supply, reset and clock management

ST7FOXU0

38/123

6.5.3

RC Control Register High (RCCRH)

Reset value: 1111 1111 (FFh)

Bits 7:0 = CR[9:2] RC Oscillator Frequency Adjustment bits

These bits must be written immediately after reset to adjust the RC oscillator

frequency. The application can store the correct value for each voltage range in Flash

memory and write it to this register at start-up.

00h = maximum available frequency

FFh = lowest available frequency

These bits are used with the CR[1:0] bits in the RCCRL register. Refer to

Chapter 6.5.4.

Note:

To tune the oscillator, write a series of different values in the register until the correct

frequency is reached. The fastest method is to use a dichotomy starting with 80h.

CR9

CR8

CR7

CR6

CR5

CR4

CR3

CR2

Read/write

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