产品名称:

WTC6212BSI

  • 产品参数
  • 应用秘籍
  • 产品概述
  • 工作电路
  • 参考方案

Operating voltage: WTC6212BSI: 3.3V

Output voltage range: GND

Sensing thickness (insulating medium): 0-20mm

Response time of effective touch: Less than 100ms

Operating temperature: -40°C—+85°C

Storage temperature: -50°C—+125°C


Be applicable to various kitchen apparatuses, audio and video devices, air conditioners, sanitary electrical apparatuses, lights and switches, security equipment, instruments, portable player, mobile phones, electronic toys and learning machines.


WTC6212BSI Inductive touch switch chip of twelve-channel electric capacitance

Specification  (V1.5)

WTC6212BSI series touch sensing IC is an integrated circuit designed to achieve human touch interface. It can replace the mechanical light touch key to realize waterproof and dustproof, seal isolation, with strong and artistic operation interface. A WTC6212BSI can achieve 4 to 12 independent keys. The user can use it flexibly according to the needs.


Definitions of WTC6212BSI Pins:

WTC6212BSI pin configuration diagram is shown in the figure 1 below :

 

引脚图15.jpg

                   Figure 1

The definitions of WTC6212BSI pins

Pin No.

Pin Name

Usage

Function Description

1

SW7

|

Capacitive sensor (key sense element) interface 7

2

SW6

|

Capacitive sensor (key sense element) interface 6

3

SW5

|

Capacitive sensor (key sense element) interface 5

4

SW4

|

Capacitive sensor (key sense element) interface 4

5

SW3

|

Capacitive sensor (key sense element) interface 3

6

SW2

|

Capacitive sensor (key sense element) interface 2

7

SW1

|

Capacitive sensor (key sense element) interface 1

8

SW0

|

Capacitive sensor (key sense element) interface 0

9

CSEL

|

Capacitor interface for adjusting the sensitivity

10

GND 

|

Power ground

11

S0

|

The S0 must be connected to VCC usufully for the internal test foot

12

S1

|

The S1 must be connected to VCC usufully for the internal test foot

13

DATA0 

|/O

BCD code output and sensitivity fine adjustment input

14

DATA1

|/O

BCD code output and sensitivity fine adjustment input

15

DATA2

|/O

BCD code output and sensitivity fine adjustment input

16

DATA3

|/O

BCD code output and sensitivity fine adjustment input

17

/RST

|

Chip reset pin

18

VCC

|

positive power supply output

19

OUT_FLAG

O

Key state indicator: 1 indicates that the key has no effective touch; 0indicates that there is a key pressed

20

SETUP

|

The symbol of sensitivity fine adjustment input: setting 0 indicates that the sensitivity is input and set by the user; when setting 1, it indicates that IC normally performs the test work.

21

SW11

|

Capacitive sensor (key sense element) interface 11

22

SW10

|

Capacitive sensor (key sense element) interface 10

23

SW9

|

Capacitive sensor (key sense element) interface 9

24

SW8

|

Capacitive sensor (key sense element) interface 8


Output Display:

Sequence diagram of BCD interface output When the effective touch occurred on the induction disk is detected, the WTC6212BSI outputs the BCD code of the corresponding induction disk in 200ms, so that the user MCU can process it. The OUT_FLAG foot indicates the state of the key; 1 indicates that the key has no effective touch, and 0 indicates that it has a key pressed. The sequential relationship between the OUT_FLAG and BCD code output feet (DATA3 ~ DATA0) is shown in Figure 2

WTC6212BSI

                                                    Figure 2: Sequence diagram of key output


Peripheral Circuit:

 

WTC6212BSI

                         Figure 3: WTC6212BSI Application Schematic Diagram

 


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