Bit 1—NMI Flag (NMIF): Indicates that NMI has been input. This bit is set regardless of
whether or not the DMAC is operating. If this bit is set during data transfer, transfers on all
channels are suspended. The CPU cannot write 1 to NMIF. This bit can only be cleared by writing
0 after reading 1.
Bit 1: NMIF
Description
0
No NMI input, DMA transfer enabled
(Initial value)
[Clearing condition]
When 0 is written to NMIF after reading NMIF = 1
1
NMI input, DMA transfer disabled
[Setting condition]
When an NMI interrupt is generated
Bit 0—DMAC Master Enable (DME): Enables activation of the entire DMAC. When the DME
bit and the DE bit of the CHCR register for the corresponding channel are set to 1, that channel is
enabled for transfer. If this bit is cleared during data transfer, transfers on all channels are
suspended.
Even if the DME bit has been set, transfer is not enabled when TE is 1 or DE is 0 in CHCR, or
when the NMI or AE bit in DMAOR is 1.
Bit 0: DME
Description
0
1
Operation disabled on all channels
Operation enabled on all channels
(Initial value)
Rev. 6.0, 07/02, page 509 of 986
RENESAS [ RENESAS TECHNOLOGY CORP ]
