TRGMUX
PMC 1.2V
TSI
TSI0_CHx
PERIPHERAL B
PERIPHERAL A
TSI_HW_TRG
TRGMUX_OUTx
TRGMUX_INx
PAD B
PAD A
CPU
DMA
INTERRUPT
DMA REQ
PMC
48.2 Introduction
Touch sensing interface (TSI) provides touch sensing detection on capacitive touch
sensors. The external capacitive touch sensor is typically formed on PCB and the sensor
electrodes are connected to TSI input channels through the I/O pins in the device.
The TSI operates in switching integration mode to achieve low-power, high-sensitivity
and advanced EMC robustness. It supports both of self-cap and mutual-cap sensors. In
self-cap mode, the TSI requires only one pin for each touch sensor. In mutual-cap mode,
sensing is done using capacitive touch matrix in various Tx-Rx configurations. The TSI
requires one pin per Tx line and one pin per Rx line.
It fully supports NXP touch sensing software (TSS) library which provides a solid
capacitive measurement module to the implementation of touch keyboard, rotaries and
sliders.
Chapter 48 Touch Sensing Input (TSI)
Kinetis KE1xZ256 Sub-Family Reference Manual, Rev. 3, 07/2018
NXP Semiconductors
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