STMPE610 datasheet(29/56 Pages) STMICROELECTRONICS

Part #	STMPE610

Description	S-Touch?? advanced touchscreen controller with 6-bit port expander

PDF	56 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

Logo

29 / 56 page

STMPE610

Touchscreen controller

Doc ID 15432 Rev 3

29/56

Window tracking

The -WDW_X and WDW_Y registers allow to pre-set a sub-window in the touchscreen such

that any touch position that is outside the sub-window will be discarded.

Figure 10.

Window tracking

FIFO

FIFO has a depth of 128 sectors. This is enough for 128 sets of touch data at maximum

resolution (2 x 12 bits). FIFO can be programmed to generate an interrupt when it is filled to

a pre-determined level.

Sampling

The STMPE610 touchscreen controller has an internal 180 kHz, 12-bit ADC able to execute

autonomous driving/sampling. Each "sample" consists of 4 ADC readings that provide the X

and Y locations, as well as the touch pressure.

Figure 11.

Sampling

Active window

Top right coordinates

Bottom left coordinates

ADC

takes X reading

Settling

period

Drive X

ADC

takes Y reading

Settling

period

Drive Y

STMPE610 Datasheet(PDF) 29 Page - STMicroelectronics