STM32L151RBH6TR STMicroelectronics, STM32L151RBH6TR Datasheet - Page 26

• Manufacturer Part Number: STM32L151RBH6TR
• Description: ARM Microcontrollers - MCU 32-Bit ARM Cortex 128kb Low Power MCU
• Manufacturer: STMicroelectronics

Specifications of STM32L151RBH6TR

• Product Category: ARM Microcontrollers - MCU
• Rohs: yes
• Core: ARM Cortex M3
• Data Bus Width: 32 bit

Functional overview
3.13
3.14
3.15
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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).
Routing interface
This interface controls the internal routing of I/Os to TIM2, TIM3, TIM4 and to the
comparator and reference voltage output.
Touch sensing
The STM32L15xxx 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
implementation based on a surface charge transfer acquisition principle. It consists of
charging the sensor capacitance and then transferring a part of the accumulated charges
into a sampling capacitor until the voltage across this capacitor has reached a specific
threshold. The capacitive sensing acquisition only requires few external components to
operate.
Reliable touch sensing functionality can be quickly and easily implemented using the free
STM32L1xx STMTouch touch sensing firmware library.
Timers and watchdogs
The ultra-low-power STM32L15xxx devices include six general-purpose timers, two basic
timers and two watchdog timers.
Table 8
Table 8.
Timer
TIM2,
TIM3,
TIM4
TIM9
compares the features of the general-purpose and basic timers.
resolution
Counter
16-bit
16-bit
Timer feature comparison
Counter
up/down
down,
type
Up,
Up
Doc ID 17659 Rev 8
Any integer
Any integer
and 65536
and 65536
between 1
between 1
Prescaler
factor
DMA request
generation
Yes
No
STM32L151x6/8/B, STM32L152x6/8/B
Capture/compare
channels
4
2
Complementary
outputs
No
No