Motorola ColdFire MCF5281 - Manual (Page 299)

DMA Controller Module
Freescale Semiconductor 16-3
31–16 — Reserved. Should be cleared.
15–0 DMACn DMA Channel n. Each four bit field defines the logical connection between the DMA requestors and
that DMA channel. There are seven possible requesters (4 DMA Timers and 3 UARTs). Any request
can be routed to any of the DMA channels. Effectively, the DMAREQC provides a
software-controlled routing matrix of the 7 DMA request signals to the 4 channels of the DMA
module. DMAC3 controls DMA channel 3. DMAC2 controls DMA channel 2. DMAC1 controls DMA
channel 1. DMAC0 controls DMA channel 0.
1000 UART0.
1001 UART1.
1010 UART2.
0100 DMA Timer 0.
0101 DMA Timer 1.
0110 DMA Timer 2.
0111 DMA Timer 3.
All other values are reserved and will not generate a DMA request.
Table 16-1. DMAREQC Field Description (continued)
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3