Freescale Semiconductor MC68332 - Page 135

QUEUED SERIAL MODULE MC68332
6-12 USER’S MANUAL
Figure 6-5 Flowchart of QSPI Master Operation (Part 1)
READ COMMAND CONTROL
AND TRANSMIT DATA
FROM RAM USING QUEUE
POINTER ADDRESS
A1
WORKING QUEUE POINTER
CHANGED TO NEWQP
IS QSPI
DISABLED
NO
YES
EXECUTE SERIAL TRANSFER
STORE RECEIVED DATA
IN RAM USING QUEUE
POINTER ADDRESS
B1
QSPI CYCLE BEGINS
(MASTER MODE)
YES
ASSERT PERIPHERAL
CHIP-SELECT(S)
IS PCS TO
SCK DELAY
PROGRAMMED
EXECUTE STANDARD DELAY
YES
EXECUTE PROGRAMMED DELAY
HAS NEWQP
BEEN WRITTEN
QSPI FLOW 2
?
NO
NO
?
?
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