STMPE16M31 datasheet(51/85 Pages) STMICROELECTRONICS

Part #	STMPE16M31

Description	S-Touch® 16/24-channel touchkey controller with PWM and ratio engines

PDF	85 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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51 / 85 page

STMPE16M31, STMPE24M31

Touch sensor controller

Doc ID 16174 Rev 4

51/85

13.4

Locked impedance

Locked impedance is data available in channel data the moment 0x06 is written into

“channel data type register”. Writing a different value into the “channel data type register”

allows the locked impedance to be refreshed.

In actual application, software writes 0x06, reads locked impedance, writes 0x00, writes

0x06, and reads the next set of data.

For data type 0x04-0x05, data are constantly being refreshed, even as it is being accessed.

If accessed slowly, the full set of data may have been sampled at significantly different time.

13.5

Calibration

Calibration event is performed in every period which is programmable from the calibration

interval register (0x76). In each calibration event, 8 impedance samples are collected and

averaged. The time period between samples is programmable from CAL_MOD (model

Figure 16.

Calibration

Obsolete

Product(s)

- Obsolete

Product(s)

STMPE16M31 Datasheet(PDF) 51 Page - STMicroelectronics