IT7230: touch button controllers

T7230 supports max. 13 touch keys with a post-processing with CDC, and it can automatically calibrate and compensate the front-end CDC values for environmental changes.

The IT7230 supports one I2C compatible interface to communicate with the host. It also supports two address
select pins to specify the device ID addresses. Through this interface, the host can program the internal
controlled registers to configure this chip to meet users’ requirements. Furthermore, GPIO and current-control
functions are supported to indicate the specific status or LED dimming by the user’s definition.

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PART NO	PACKAGE TYPE	DESCRIPTION	FLASH SUPPORT

Programmable Capacitance-to-Digital Converter(CDC)
- Maximum 13 capacitance sensor inputs
- 9 ms update rate, all 13 sensor inputs
- No external RC components required
- Automatic conversion sequencer

On-chip Automatic Calibration Logic
- Automatic calibration & compensation for environmental changes
- Automatic adaptive threshold and sensitivity levels

On-chip RAM to Store Calibration Data
- Hardware initialization of SRAM
- Host can access SRAM freely at any time

Supports 1 Interrupt Output and 2 Touch Detection Outputs

Supports a Maximum of 13 General Purpose Input/Output (GPIO)

Supports a Maximum of 15 Current-Control Output for LED Dimming Function

Supports Dynamic Power Saving Mode
- Provides three operational modes: active, idle and sleep modes
- Provides host special commands to switch between these modes

Hardware Slider Function
- Provides two 32-level hardware auto slider function

I2C Compatible Interface
- Compliant with I2C specification v2.1
- Supports slave device only
- Supports standard and fast modes
- 7-bit device addressing modes
- Supports 2 address select pins to configure the device address selection (IT7230AFN only)

Supports I2C 1.8V Interface
- At power source under 3.0V

Operation Power
- One power source 2.5V ~ 3.6V
- Provides one internal power regulator for core power generation

NO	RELEASE DATE	TITLE	DOWNLOAD

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IT7230: touch button controllers