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Can the DMA transferring be suspended?

Latest Updated:03/25/2009

Question:

Can the DMA transferring be suspended?

Answer:

The conditions for suspension of DMA transferring are as follows;

(1) Generating NMI interrupts.
(2) Generating an address error by DMAC.
(3) High level detection of DREQ#. (When it is detected in low level on external request mode)

In cycle-steal mode, the suspension of DMA transferring is possible by clearing DE bit(DMAC enable bit) of DMA channel control register(CHCR) or DME bit(DMAC master enable bit) of DMA operation register(DMAOR).

Suitable Products
SH7144, SH7145
SH7065
SH7058
SH7055
SH7050, SH7051
SH7052, SH7053, SH7054
SH7040, SH7041, SH7042, SH7043, SH7044, SH7045
SH7032, SH7034, SH7034B
SH7032
SH7020, SH7021
SH7018
SH7014, SH7016, SH7017
SH7011