Data Sheet

Functional overview STM32F030x4/6/8/C
15/96 DocID024849 Rev 2
Figure 2. Clock tree
1. LSI/LSE is not available in STM32F030x8 devices.
3.7 General-purpose inputs/outputs (GPIOs)
Each of the GPIO pins can be configured by software as output (push-pull or open-drain), as
input (with or without pull-up or pull-down) or as peripheral alternate function. Most of the
GPIO pins are shared with digital or analog alternate functions.
The I/O configuration can be locked if needed following a specific sequence in order to
avoid spurious writing to the I/Os registers.
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