Hi, all! I am estimating a chance to implement 100...200 kHz ADC equidistant sampling on ST10F269 (in continuous mode, I need it for signal processing in real-time, no OS). ADC is external and this is the AD7328 chip that is planned to be. The ADC must be connected through SPI bus, only this choice, unfortunately. As far as I am aware, PEC may be programmed to sustain the continuous transfer, and this is what I am actually want from the PEC. Further, it is ordinary way to put ADC's samples to a FIFO. That, in its turn, requires one of the PEC's pointer to be incremented. Now first limitation arises, namely PEC' pointer should be reprogrammed to avoid pointer being out-of array boundary. So, the interrupt must be serviced in order to reset pointer and this is in contradiction with continuous PEC' transfer that assumes no s/w routines exists. Again, this FIFO must be mapped to segment 0 if PEC involved, and this is also really limitation (data size). 1. My question is, am I right? 2. And what one could advise to achieve EQUIDISTANT sampling at 100 kHz? - With PEC to reduce CPU load. Solution like SPI's IRQs-base approach is the worst-case. 3. Am I right, PEC' pointers can not be programmed to organize circular buffer like in ADSP-21xx?