Definitions of WTC66K1R Pins：
Figure 1：Pin figure
Definitions of WTC62K1R Pins：
| Pin No. | Pin Name | Usage | Function Description |
| 1 | BLC | O | Backlight LED control pin |
| 2 | BUZZ | O | Buzzer control pin |
| 3 | SW8 | | | Roller induction disc unit interface |
| 4 | SW9 | | | Roller induction disc unit interface |
| 5 | SW10 | | | Roller induction disc unit interface |
| 6 | SW11 | | | Roller induction disc unit interface |
| 7 | SW12 | | | Roller induction disc unit interface |
| 8 | SW13 | | | Roller induction disc unit interface |
9
| SW14 | | | Roller induction disc unit interface |
| 10 | SW15 | | | Roller induction disc unit interface |
| 11 | CSEL | | | Sensitivity adjustable capacitor interface |
| 12 | GND | | | Power ground |
| 13 | CODER1 | O | Roller encoder pulse output 1 |
| 14 | CODER0 | O | Roller encoder pulse output 0 |
| 15 | OUT0 | O | Touch key SW0 status output |
| 16 | OUT1 | O | Touch key SW1 status output |
17
| OUT2 | O | Touch key SW2 status output |
| 18 | OUT3 | |/O | Touch key SW3 status output |
| 19 | /RST | | | Chip reset pin |
| 20 | VCC | | | positive power supply output |
| 21 | OUT4 | O | Touch key SW4 status output |
| 22 | OUT5 | O | Touch key SW5 status output |
| 23 | SW0 | | | Touch key (induction disc) interface 0 |
| 24 | SW1 | | | Touch key (induction disc) interface 1 |
| 25 | SW2 | | | Touch key (induction disc) interface 2 |
| 26 | SW3 | | | Touch key (induction disc) interface 3 |
| 27 | SW4 | | | Touch key (induction disc) interface 4 |
| 28 | SW5 | | | Touch key (induction disc) interface 5 |
Peripheral Circuit:
RP1 ,RP2,and R1,R2 are the match resistance group. Please try to place them close to the IC
Figure 4: WTC66K1R Application Schematic Diagram
Output Display:
The output of the touch key
When the occurrence of effective touch on the sense element is detected, WTC66K1R will output the status of corresponding sense element channel within 100ms, so that it can be processed by user MCU, or directly drive the execution circuit to work
The relationship between the output signal and the touch key input channel is shown below
The signal output does not have the output jitter of the mechanical key. The user does not need to make mechanical key to jitter.
Figure 2: Sequence diagram of the output of the key
Touch rotary encoder output
The operation mode and output signal of the touch roller are consistent with the common mechanical roller encoder. But there is no the burr of mechanical outputpulse. The user does not have to handle the soft and hardware aiming at the burr
Figure 3: Sequence diagram of touch roller output
The rotation of roller gives 18 pulses a week.
The phase difference between the two pulses is around 6ms.