Key facts
- Brand
- STMicroelectronics
- Model
- STM32L1xx
- Category
- microcontrollers
- Documents
- 3
- Languages
- EN
- Last added
- 2012-08-07
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ST AN3309 handbook
This document presents the Clock configuration tool designed for the STM32L1xx microcontroller family. The tool assists users in configuring microcontroller clocks by considering specific product parameters such as power supply, voltage range, and Flash access mode. It is implemented as an Excel file that simplifies the management of system aspects including HCLK source, Core voltage, Flash latency, and peripheral clock frequencies.
Read onlineSTMicroelectronics STM32L1xx specifications
| Supported Microcontroller Family | STM32L1xx |
|---|---|
| Minimum RAM Requirement | 256 MB |
| Maximum System Clock Frequency | 32 MHz |
| Maximum HSE Frequency (Vcore 1.8V) | 24 MHz |
| Maximum PLLVCO Frequency (Vcore 1.8V) | 96 MHz |
| USB Clock Frequency Requirement | 48 MHz |
Source: ST AN3309 handbook
All STMicroelectronics STM32L1xx documents by type
How to use the product for one specific task, with worked examples.
Questions answered in these manuals
What operating systems are supported by the Clock tool?
The tool requires a recent version of Windows, such as Windows XP, Vista, or Windows 7.
From: ST AN3309 handbook
What software is required to use the Clock tool?
Microsoft Office must be installed on the machine to use the tool.
From: ST AN3309 handbook
How is the IAP driver programmed into memory?
The IAP driver should be programmed to the Flash memory base address via the JTAG/SWD interface using a development toolchain or factory-embedded bootloader.
How does the user switch to IAP mode?
The user can press a push-button connected to a specific pin at reset; not pressing it switches to the user application.
What is the factory calibration accuracy of STM32L1xx internal oscillators at 25 °C?
The HSI and MSI oscillators have an accuracy of +1% typically at 25 °C.
How can the accuracy of internal RC oscillators be improved?
Accuracy can be improved by calibrating the HSI and MSI oscillators using an accurate reference signal to compensate for temperature influence.