PXD20RM Datasheet, PDF (1021/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

Enables DMA RX channel/filter
request (DMAERQH, DMAERQL)
False
!DTF & (DRF |
(DBFF & RMB)) & (IFMI != 0) &
DMA_REN ?
True
DMA Rx transfer (Req/Ack)
from LINFlex regs to RAM
area (channel/filter mapping)
False
DMA Rx transfer
done ?
True
False
False
DRF ?
True
Clear DRF
DBFF &
RMB ?
True (extended frame,
size > 8 bytes)
Clear DBFF,RMB
(for extended frame)
Figure 27-50. FSM to control the DMA RX interface (slave node)
The TCD settings (word transfer) are shown in Table 27-48. All other TCD fields = 0. TCD settings based
on half-word or byte transfer are allowed.
Table 27-48. TCD settings (slave node, RX mode)
TCD Field
CITER[14:0]
BITER[14:0]
Value
1
1
Description
Single iteration for the “major” loop
Single iteration for the “major” loop
Freescale Semiconductor
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
27-65