STM32L462CEU6 datasheet(38/198 Pages) STMICROELECTRONICS

38 / 198 page

Functional overview

STM32L462CE STM32L462RE STM32L462VE

38/198

DocID029969 Rev 1

The main features of the touch sensing controller are the following:

•

Proven and robust surface charge transfer acquisition principle

•

Supports up to 21 capacitive sensing channels

•

Up to 3 capacitive sensing channels can be acquired in parallel offering a very good

response time

•

Spread spectrum feature to improve system robustness in noisy environments

•

Full hardware management of the charge transfer acquisition sequence

•

Programmable charge transfer frequency

•

Programmable sampling capacitor I/O pin

•

Programmable channel I/O pin

•

Programmable max count value to avoid long acquisition when a channel is faulty

•

Dedicated end of acquisition and max count error flags with interrupt capability

•

One sampling capacitor for up to 3 capacitive sensing channels to reduce the system

components

•

Compatible with proximity, touchkey, linear and rotary touch sensor implementation

•

Designed to operate with STMTouch touch sensing firmware library

Note:

The number of capacitive sensing channels is dependent on the size of the packages and

subject to I/O availability.

3.21

Digital filter for Sigma-Delta Modulators (DFSDM)

The device embeds one DFSDM with 2 digital filters modules and 4 external input serial

channels (transceivers) or alternately 4 internal parallel inputs support.

The DFSDM peripheral is dedicated to interface the external Σ∆ modulators to

microcontroller and then to perform digital filtering of the received data streams (which

represent analog value on Σ∆ modulators inputs). DFSDM can also interface PDM (Pulse

Density Modulation) microphones and perform PDM to PCM conversion and filtering in

STM32L462CEU6 数据表(PDF) 38 Page - STMicroelectronics

STM32L462CEU6 数据表(HTML) 38 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

数据表下载