STM8T141 STMicroelectronics, STM8T141 Datasheet - Page 8

• Manufacturer Part Number: STM8T141
• Description: Single-channel capacitive sensor for touch or proximity detection with shielded sensing electrode
• Manufacturer: STMicroelectronics

Block diagram
2
Figure 1.
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SHLDIN
C X
C S
Block diagram
STM8T141 block diagram
RC oscillator
The 500-kHz RC oscillator is an internal fixed frequency oscillator used to supply the clock
to the MCU system engine.
Power-On-Reset (POR)
The POR generates a reset signal depending on the power supply level and the clock
pulses received from the RC oscillator.
Voltage regulator
The voltage regulator has an internal comparison and feedback circuit that ensures the
V
capacitor.
MCU system engine
The MCU system engine controls the capacitive sensing engine and processes touch and
proximity detection signals.
ProxSense engine
The ProxSense engine circuitry employs a charge-transfer method to detect changes in
capacitance.
REG
voltage is kept stable and constant. The regulator requires an external smoothing
ProxSense
engine
MCU system engine
regulator
Voltage
Doc ID 15699 Rev 7
POR
500 kHz RC
oscillator
TOUT/POUT
SHLDOUT
V REG
V DD
V SS
STM8T141
ai17207