DMA Implements Interrupt Accounting Support

Zynq UltraScale+ Device Technical Reference Manual (UG1085)

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2.4 English

The software can selectively enable interrupt generation on each descriptor (independent on SRC and DST). On every descriptor done (which asked for an interrupt), the DMA increments a descriptor done counter. Each DMA channel implements an 8-bit interrupt accounting counter on the SRC and DST sides. An interrupt accounting counter overflow is indicated as an interrupt. Independent SRC and DST interrupts are generated. This is non-fatal error as it does not affect the channel functionality.