EP80579 Datasheet, PDF (343/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
12.11.4 EDMA Process Flow
Figure 12-17 provides a high-level flow chart of the EDMA initialization sequence.
Figure 12-18 provides a similar view of the EDMA completion sequence.
Figure 12-17.Initiation Flow Chart
Initiate EDMA Transfer
Program EDMA
Appending
Yes
to Existing
Chain
No
Set Suspend
EDMA Bit
Program EDMA
Update Terminal
Descriptor in
Memory
Set Channel Resume
bit, clear Suspend bit
Clear Channel Status
Register
1. Set Next Descriptor Address Register (64b)
2. Set Channel Control Register
(Start EDMA bit and other Control bits)
Return
Is
Channel No
Active
Set?
Yes
Return
Wait
Time
No
Out?
Yes
Error Return
B4492-01
August 2009
Order Number: 320066-003US
Intel^® EP80579 Integrated Processor Product Line Datasheet
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