Digi NS9750 - Manual (Page 678)

S e r i a l p o r t c o n t r o l a n d s t a t u s r e g i s t e r s
6 5 4 N S 9 7 5 0 H a r d w a r e R e f e r e n c e
D00 R/W ETXDMA 0 Enable transmit DMA
Enables the transmitter to interact with a DMA channel.
The channel is configured to operate in DMA mode when
ETXDMA is set to 1. In DMA mode, the DMA controller
loads the transmit data FIFO from memory. The transmit
status information from Status Register C is moved
automatically to the transmit DMA buffer descriptor.
This bit is cleared to pause the transmitter.
Bits Access Mnemonic Reset Description
Table 384: Serial Channel B/A/C/D Control Register A