Lars Beiderbecke

Senior III

Solved

What is "LSE drive"?

Forum|Forum|5 years ago
September 17, 2020
4 replies
1919 views

I'm trying to figure out the battery consumption of an STM32F746. Accodring to the datasheet, that depends on SRAM state, RCC state, and if the LSE is in low, medium low, medium high, or high drive.

I have no idea what these kinds of drives are, nor did I find them in the reference. How can I configure the "drive", and what is the default?

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Best answer by waclawek.jan

> What is "LSE drive"?

Gain of amplifier of the LSE oscillator.

Read RCC_BDCR description in RM. Read AN2867.

JW

waclawek.janBest answer

Super User

> What is "LSE drive"?

Gain of amplifier of the LSE oscillator.

Read RCC_BDCR description in RM. Read AN2867.

JW

Lars BeiderbeckeAuthor

Senior III

I'm using an ASFL1 by Abacron. According to the application note, one critical parameter of the oscillator is the oscillator transconductance (unit: mA/V). However, my datasheet doesn't list this value (probably none of Abacron's datasheets are).

How can I find the transconductance values?

Lars BeiderbeckeAuthor

Senior III

Will do, thanks Jan!