PXD20RM Datasheet, PDF (649/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

bit is set, then the corresponding DMAERQ bit is cleared, disabling the DMA request; else if the d_req bit
is cleared, the state of the DMAERQ bit is unaffected.
16.2.1.4 DMA Enable Error Interrupt (DMAEEIH, DMAEEIL)
The DMAEEI{H,L} registers provide a bit map for the implemented channels {16} to enable the error
interrupt signal for each channel. DMAEEIH supports channels 63-32, while DMAEEIL covers channels
31-00. The state of any given channel’s error interrupt enable is directly affected by writes to this register;
it is also affected by writes to the DMASEEI and DMACEEI registers. The DMA{S,C}EEI registers are
provided so that the error interrupt enable for a single channel can easily be modified without the need to
perform a read-modify-write sequence to the DMAEEI{H,L} registers.
Both the DMA error indicator and this error interrupt enable flag must be asserted before an error interrupt
request for a given channel is asserted. See Figure 16-5 and Table 16-5 for the DMAEEI definition.
Register address: DMA_Offset + 0x0010 (DMAEEIH), +0x0014 (DMAEEIL)
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R EEI6 EEI6 EEI6 EEI6 EEI5 EEI5 EEI5 EEI5 EEI5 EEI5 EEI5 EEI5 EEI5 EEI5 EEI4 EEI4
W
3210987654321098
RESET: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
R
0000000000000000
W
RESET: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R
0000000000000000
W
RESET: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
R
0000000000000000
W
RESET: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
= Unimplemented
Figure 16-5. DMA Enable Error Interrupt (DMAEEIH, DMAEEIL) Registers
Table 16-5. DMA Enable Error Interrupt (DMAEEIH, DMAEEIL) field descriptions
Name
EEIn,
n = 0,... 15
Description
Enable Error Interrupt n
Value
0 The error signal for channel n does not generate an
error interrupt.
1 The assertion of the error signal for channel n
generate an error interrupt request.
Freescale Semiconductor
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
16-11