STM8T143 datasheet(8/65 Pages) STMICROELECTRONICS

Part #	STM8T143

Description	Single-channel capacitive sensor for touch and proximity detection

PDF	65 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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8 / 65 page

Block diagram

STM8T143

8/65

DocID18315 Rev 6

Block diagram

Figure 1. STM8T143 block diagram

RC oscillator

The 1-MHz RC oscillator is an internal fixed frequency oscillator used to supply the clock to

the MCU system engine.

Voltage regulator

The voltage regulator has an internal comparison and feedback circuit that ensures the

VREG voltage is kept stable and constant. The regulator requires an external smoothing

capacitor.

MCU system engine

The MCU system engine controls the capacitive sensing engine and processes touch and

proximity detection signals.

Advanced ProxSense engine

The advanced ProxSense engine circuitry uses a charge-transfer method to detect

capacitance changes. It features:

•

An analog voltage comparator

•

A programmable internal sampling capacitor

•

A system that allows the ground parasitic capacitance to be compensated to improve

the system sensitivity. This system is called electrode parasitic capacitance

compensation (EPCC).

STM8T143 Datasheet(PDF) 8 Page - STMicroelectronics