Definitions of WTC6212ML Pins:
![WTC6212ML WTC6212ML]()
Figure 2:
Definitions of WTC6212ML Pins:
Pin No. | Pin Name | Usage | Function Description |
1 | SW7 | | | Interface of touch key 7 (sense element 7) |
2 | SW6 | | | Interface of touch key 7 (sense element 6) |
3 | SW5 | | | Interface of touch key 7 (sense element 5) |
4 | SW4 | | | Interface of touch key 7 (sense element 4) |
5 | SW3 | | | Interface of touch key 7 (sense element 3) |
6 | SW2 | | | Interface of touch key 7 (sense element 2) |
7 | SW1 | | | Interface of touch key 7 (sense element 1) |
8 | SW0 | | | Interface of touch key 7 (sense element 0) |
9
| CSEL | | | Capacitor interface for adjusting the sensitivity |
10 | GND | | | Power ground |
11 | BLC | | | When the backlight controls foot and the chip are awakened, the lowlevel is output, and when it is dormant, the high level is output. |
12 | WAKE | O | Mechanical key awakens the foot |
13 | DATA0 | O | BCD code output |
14 | DATA1 | O | BCD code output |
15 | DATA2 | O | BCD code output |
16 | DATA3 | O | BCD code output |
17
| /RST | | | Chip reset pin |
18 | VCC | | | positive power supply output |
19 | OUT_FLAG | O | Key status indicator: when there is no button pressed, it is high level, and when there is key pressed, it is low level |
20 | SETUP | | | Internal test foot, fixed connecting to VCC |
21 | SW11 | | | Interface of touch key 11 (sense element 11) |
22 | SW10 | | | Interface of touch key 11 (sense element 10) |
23 | SW9 | | | Interface of touch key 11 (sense element 9) |
24 | SW8 | | | Interface of touch key 11 (sense element 8) |
Output Display:
The real list of BCD output
Peripheral Circuit and Precautions:
Peripheral Circuit
The peripheral circuit of WTC6212ML is simple and requires only a small amount of resistance. Figure 4 is the application circuit diagram of WTC6212ML working under the 12 key mode
![WTC6212ML WTC6212ML]()
Figure 3: WTC6212ML Application Schematic Diagram