CC2430 Datasheet, PDF (93/212 Pages) Texas Instruments – A True System-on-Chip solution for 2.4 GHz IEEE 802.15.4 / ZigBee-TM

CC2430
Peripherals : DMA Controller
13.5.5 DMA Interrupts
Each DMA channel can be configured to
generate an interrupt to the CPU upon
completing a DMA transfer. This is
accomplished with the IRQMASK bit in the
channel configuration. The corresponding
interrupt flag in the DMAIRQ SFR register will
be set when the interrupt is generated.
Regardless of the IRQMASK bit in the channel
configuration, the interrupt flag will be set upon
DMA channel complete. Thus software should
always check (and clear) this register when
rearming a channel with a changed IRQMASK
setting. Failure to do so could generate an
interrupt based on the stored interrupt flag.
13.5.6 DMA Configuration Data Structure
For each DMA channel, the DMA configuration
data structure consists of eight bytes. The
13.5.7 DMA memory access
The DMA data transfer is affected by endian
convention. This as the memory system use
Big-Endian in XDATA memory, while Little-
configuration data structure is described in
Table 42.
Endian is used in SFR memory. This must be
accounted for in compilers.
CC2430 Data Sheet (rev. 2.1) SWRS036F
Page 93 of 211