产品名称：

WTC801SPI

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参考方案

Operating voltage: 2.4V

Output voltage range: GND

Sensing thickness (insulating medium): 0-10mm，Maximum 10 mm

Response time of effective touch: Less than 150ms

Operating temperature: -40°C—+85°C

Storage temperature: -50°C—+125°C

State current: 18uA (3V power supply)

Dynamic current: 1.2 mA (3V power supply)

Wake-up mode: touch sensitive key to awaken

The touch sensitive control of electrical equipment, physical quantity regulation, such as the acoustic volume,and the brightness of luminaires, lighting color, power temperature control of household appliances etc..

WTC801SPI Touch sensitive eight keys + roller chip

Specification (V1. 1)

WTC801SPI is a Touch sensitive IC designed for touch-button of replacing mechanical type and mechanical knob. It can achieve waterproof, dustproof, seal isolation, with solid and artistic operation interface. A WTC801SPI can implement 8 keys and 1 roller (Slide bar).

Definitions of WTC801SPI Pins:

Figure 1：Pin Diagram of WTC801SPI

Definitions of WTC801SPI Pins:

Pin No.	Pin Name	Usage	Function Description
1	SW6	\|	Capacitive sensor (key sense element) interface 6
2	SW7	\|	Capacitive sensor (key sense element) interface 7
3	SW8	\|	Capacitive sensor (key sense element) interface 8
4	SW9	\|	Capacitive sensor (key sense element) interface 9
5	SW10	\|	Capacitive sensor (key sense element) interface 10
6	SW11	\|	Capacitive sensor (key sense element) interface 11
7	SW12	\|	Capacitive sensor (key sense element) interface 12
8	SW13	\|	Capacitive sensor (key sense element) interface 13
9	SW14	\|	Capacitive sensor (key sense element) interface 14
10	SW15	\|	Capacitive sensor (key sense element) interface 15
11	CSEL	\|	Sensitivity adjustable capacitor interface
12	GND	\|	Power ground
13	S0	O	The internal test leg Usually needs to suspend the S0
14	S1	O	The internal test leg Usually needs to suspend the S1
15	SDI	\|	Data input line of the chip SPI interface is input the sensitivity adjustment data
16	SDO	\|	The data output line of the chip SPI interface is output the key and slider data
17	SCK	\|	The clock input line of the Chip SPI interface
18	SCS	\|	The chip selection enabled line of Chip SPI interface
19	/RST	\|	Chip reset pin
20	VCC	\|	positive power supply output
21	OUT FLAG	O	Key status indicator has the output low level signal when pressing the key or slide bar, and the output high level signal when the finger leaves the key or slide bar. The initial of the electrifying is the high level output
22	TS	O	The internal test leg needs to suspend the TS
23	SW0	\|	Capacitive sensor (key sense element) interface 0
24	SW1	\|	Capacitive sensor (key sense element) interface 1
25	SW2	\|	Capacitive sensor (key sense element) interface 2
26	SW3	\|	Capacitive sensor (key sense element) interface 3
27	SW4	\|	Capacitive sensor (key sense element) interface 4
28	SW5	\|	Capacitive sensor (key sense element) interface 5

Chip Application Schematic Diagram:

WTC801SPI

Output Display:

The SPI time sequence diagram is shown in figure 4

WTC801SPI

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