Motorola MPC533 Reference Manual page 684

SCI Queue Operation
15.8.11 QSCI1 Receive Queue Software Flow Chart
Reset
Enable Queue Interrupts
QTHFI, QBHFI = 1,
Read Status Register with
QTHF & QBHF = 1,
Write QTHF & QBHF = 0
Enable ILIE=1 to Detect
An Idle Line
Set QRE and RE = 1
QTHF=1?
QBHF = 1?
IDLE = 1?
15-78
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
Configure the Receive Queue
FunctionCan Be Used To
Indicate When a Group
Of Serial Transmissions
Is Finished
Yes
No
Yes
No
Yes
No
Clear QRE and/or RE
To Exit the Queue
Figure 15-40. Queue Receive Software Flow
MPC533 Reference Manual
Read Status Register With
QTHF = 1
Read SCRQ[0:7]
Write QTHF = 0
Read Status Register With
QBHF = 1
Read SCRQ[8:15]
Write QBHF = 0
DONE
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