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NOTE
The software trigger/pre-trigger through TRGMUX, the
ADC's own software trigger mode and the software pre-
trigger controlled by SIM are different concepts.
Following specification and diagram are just giving an example to help understanding the
ADC trigger scheme. Generally, the ADC support two kind of hardware triggering
scheme:
• The default hardware triggering scheme is using PDB to trigger ADC (suggested).
• Another optional hardware triggering scheme is using TRGMUX.
• SIM_ADCOPT[ADCxTRGSEL] bit is used to control the ADC triggering source/
scheme.
• When ADCxTRGSEL=0, the ADC pre-trigger is coming from PDB directly.
• When ADCxTRGSEL=1, the ADC pre-trigger is coming from TRGMUX, e.g.
LPIT.
ADHWT
cocoA
cocoB
SIM_ADCOPT[ADC0TRGSEL]
ADHWT
SIM_ADCOPT[ADC1TRGSEL]
SIM_ADCOPT[ADC0PRETRGSEL]
SIM_ADCOPT[ADC1PRETRGSEL]
PDB0
PDB0_ADC0_trig
ADC0
pretrig0
pretrig1
CH0
adhwtsA
adhwtsB
adhwtsA
adhwtsB
TRGMUX_ADC0_trig
cocoA
cocoB
cocoA
cocoB
ch0_trig
TRGMUX
TRGMUX_ADC0_pretrig
LPIT
LPIT_trig
LPIT_pretrig
ch1_trig
CH1
ADC1
cocoA
cocoB
pretrig0
pretrig1
Software
SIM_ADCOPT[ADC0SWPRETRG]
SIM_ADCOPT[ADC0SWPRETRG]
PDB triggering scheme:
Chip-specific information for this module
Kinetis KE1xZ256 Sub-Family Reference Manual, Rev. 3, 07/2018
734
NXP Semiconductors
Summary of Contents for Kinetis KE1xZ256
Page 2: ...Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 2 NXP Semiconductors...
Page 178: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 178 NXP Semiconductors...
Page 356: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 356 NXP Semiconductors...
Page 410: ...Interrupts Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 410 NXP Semiconductors...
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