AN2442 Datasheet, PDF (20/22 Pages) STMicroelectronics – Using the STR91xFA DMA controller

DMA transfer examples
Figure 8.
Storage procedure of IC1R and IC2R registers
TIM-IC1R Buffer
IC1R
IC1R’
IC1R’’
TIM-IC2R Buffer
IC2R
IC2R’
IC2R’’
AN2442
2.6.5
values captured for the
same input capture event
,..,
IC1R
Values transferred by
DMA channel0
,..,
IC2R
Values transferred by
DMA channel1
Hardware connection
The external signal comes from TM1-PWM pin to be injected in TM0-IC1 pin so:
● Connect TM1-PWM pin (P4.2) to TM0-IC1 pin (P4.0).
20/22