Operation End/Stopping - Fujitsu FR60 Hardware Manual

CHAPTER 16 DMA CONTROLLER (DMAC)
16.3.14

Operation End/Stopping

The end of DMA transfer is controlled independently for each channel. It is also possible
to disable operation for all channels at once.
■ Transfer End
If reloading is disabled, transfer is stopped, "Normal end" is displayed as the end code, and all transfer
requests are disabled after the transfer count register becomes "0" (Clear the DENB bit of DMACA).
If reloading is enabled, the initial value is reloaded, "Normal end" is displayed as the end code, and a wait
for transfer requests starts again after the transfer count register becomes "0" (Do not clear the DENB bit of
DMACA).
■ Disabling All Channels
If the operation of all channels is disabled with the DMA operation enable bit DMAE, all DMAC
operations, including operations on active channels, are stopped. Then, even if the operation of all channels
is enabled again, no transfer is performed unless a channel is restarted. In this case, no interrupt whatever
occurs.
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