Embedded Solutions
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occur. This bit is useful for software development and debugging.
Transmit Enable: When this bit is ‘1’, the transfer state machine is enabled to move data
from the referenced channel’s transmit FIFO to the corresponding Virtex transmit FIFO.
When this bit is ‘0’, the transmit transfer state machine is disabled.
Receive Enable: When this bit is ‘1’, the transfer state machine is enabled to move data
from the referenced channel’s Virtex receive FIFO to the corresponding local receive
FIFO. When this bit is ‘0’, the receive transfer state machine is disabled.
Virtex Interrupt Enable: When this bit is ‘1’, the corresponding Virtex interrupt (VINT0 for
channel 0 or VINT1 for channel 1) is enabled to cause a system interrupt when active.
When this bit is ‘0’, the Virtex interrupt can not cause a system interrupt.
DMA Write Arbitration Priority Enable: When this bit is ‘1’, the write DMA for the
referenced channel will receive priority if the TX FIFO has become almost empty as
defined by the value stored in the TX_AMT_LVL register. When this bit is ‘0’, the DMA
arbitration will follow round-robin arbitration priority.
DMA Read Arbitration Priority Enable: When this bit is ‘1’, the read DMA for the
referenced channel will receive priority if the RX FIFO has become almost full as
defined by the value stored in the RX_AFL_LVL register. When this bit is ‘0’, the DMA
arbitration will follow round-robin arbitration priority.