DocID027369 Rev 1

11/17

AN4646

Peripheral interconnect matrix

16

2.4

System block

The system blocks include:

•

•

•

External interrupt/event controller (EXTI).

2.4.1

From VBAT, VREFINT to ADC

injected or as a regular channel.

Refer to the following reference manual sections for a description of the interconnection

•

Channel selection

•

Battery charge monitoring.

2.4.2

From EXTI to analog block

An external interrupt/event (EXTI) can be used to generate an ADC trigger event or to start

DAC conversion.

ADC synchronization is described in the Conversion on external trigger and trigger polarity

section of the reference manuals.

2.5

Communication interfaces

2.5.1

From USB block to TIM

The USB OTG_FS SOF pulse signal can trigger TIM2 general-purpose timer.

Figure 4. SOF connectivity