STM32L151VB datasheet(27/133 Pages) STMICROELECTRONICS

部件名	STM32L151VB

功能描述	Ultra-low-power 32-bit MCU ARM®-based Cortex®-M3, 128KB Flash, 16KB SRAM, 4KB EEPROM, LCD, USB, ADC, DAC

PDF	133 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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27 / 133 page

DocID17659 Rev 12

27/133

STM32L151x6/8/B STM32L152x6/8/B

Functional overview

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.

3.15

Timers and watchdogs

The ultra-low-power STM32L151x6/8/B and STM32L152x6/8/B devices include six general-

purpose timers, two basic timers and two watchdog timers.

Table 6 compares the features of the general-purpose and basic timers.

Table 6. Timer feature comparison

Timer

Counter

resolution

Counter

type

Prescaler

factor

DMA request

generation

Capture/compare

channels

Complementary

outputs

TIM2,

TIM3,

TIM4

16-bit

Up,

down,

up/down

Any integer

between 1

and 65536

Yes

TIM9

16-bit

Any integer

between 1

and 65536

TIM10,

TIM11

16-bit

Any integer

between 1

and 65536

TIM6,

TIM7

16-bit

Any integer

between 1

and 65536

Yes

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