MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
Freescale Semiconductor 17-15
6 UCPREN Prescaler enable. Enables the prescaler counter.
0 Prescaler disabled (no clock) and prescaler counter is loaded with UCPREvalue
1 Prescaler enabled
7 DMA Direct memory access. Selects if the FLAG generation will be used as an interrupt or as a
DMA request.
0 FLAG assigned to Interrupt request
1 FLAG assigned to DMA request
Not all eMIOS channels support DMA, as shown below. The DMA bit should not be
changed from its default value of 0 for any channel that does not support DMA. eMIOS
channels 6, 7, 10, 11, 16, 17, 18, and 19 DMA support is only for MPC5554.
Table 17-10. EMIOS_CCRn Field Description (Continued)
Bits Name Description
eMIOS Channel DMA = 0 DMA = 1
0 Interrupt DMA request
1 Interrupt DMA request
2 Interrupt DMA request
3 Interrupt DMA request
4 Interrupt DMA request
5 Interrupt Reserved
6 Interrupt DMA request
7 Interrupt DMA request
8 Interrupt DMA request
9 Interrupt DMA request
10 Interrupt DMA request
11 Interrupt DMA request
12 Interrupt Reserved
13 Interrupt Reserved
14 Interrupt Reserved
15 Interrupt Reserved
16 Interrupt DMA request
17 Interrupt DMA request
18 Interrupt DMA request
19 Interrupt DMA request
20 Interrupt Reserved
21 Interrupt Reserved
22 Interrupt Reserved
23 Interrupt Reserved
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