STM32L151X8 datasheet(26/133 Pages) STMICROELECTRONICS

26 / 133 page

Functional overview

STM32L151x6/8/B STM32L152x6/8/B

26/133

DocID17659 Rev 12

This dual digital Interface supports the following features:

•

two DAC converters: one for each output channel

•

left or right data alignment in 12-bit mode

•

synchronized update capability

•

noise-wave generation

•

triangular-wave generation

•

dual DAC channels’ independent or simultaneous conversions

•

DMA capability for each channel (including the underrun interrupt)

•

external triggers for conversion

•

input reference voltage VREF+

Eight DAC trigger inputs are used in the STM32L151x6/8/B and STM32L152x6/8/B devices.

The DAC channels are triggered through the timer update outputs that are also connected

to different DMA channels.

3.12

Ultra-low-power comparators and reference voltage

The STM32L151x6/8/B and STM32L152x6/8/B devices embed two comparators sharing

the same current bias and reference voltage. The reference voltage can be internal or

external (coming from an I/O).

•

one comparator with fixed threshold

•

one comparator with rail-to-rail inputs, fast or slow mode. The threshold can be one of

the following:

–

DAC output

–

External I/O

–

Internal reference voltage (VREFINT) or VREFINT submultiple (1/4, 1/2, 3/4)

Both comparators can wake up from Stop mode, and be combined into a window

comparator.

The internal reference voltage is available externally via a low power / low current output

buffer (driving current capability of 1 µA typical).

3.13

Routing interface

This interface controls the internal routing of I/Os to TIM2, TIM3, TIM4 and to the

comparator and reference voltage output.

3.14

Touch sensing

The STM32L151x6/8/B and STM32L152x6/8/B devices provide a simple solution for adding

capacitive sensing functionality to any application. These devices offer up to 20 capacitive

sensing channels distributed over 10 analog I/O groups. Only software capacitive sensing

acquisition mode is supported.

Capacitive sensing technology is able to detect the presence of a finger near a sensor which

is protected from direct touch by a dielectric (glass, plastic, ...). The capacitive variation

introduced by the finger (or any conductive object) is measured using a proven

STM32L151x8 Datasheet(PDF) 26 Page - STMicroelectronics

STM32L151x8 Datasheet(HTML) 26 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL