Freescale Semiconductor MC68332 - Page 138

MC68332 QUEUED SERIAL MODULE
USER’S MANUAL 6-15
Figure 6-6 Flowchart of QSPI Slave Operation (Part 1)
READ TRANSMIT DATA
FROM RAM USING QUEUE
POINTER ADDRESS
B2
QUEUE POINTER
CHANGED TO NEWQP
NO
WRITE QUEUE POINTER TO
CPTQP STATUS BITS
STORE RECEIVED DATA
IN RAM USING QUEUE
POINTER ADDRESS
C
YES
EXECUTE SERIAL TRANSFER
WHEN SCK RECEIVED
IS SLAVE
SELECT PIN
ASSERTED
HAS NEWQP
BEEN WRITTEN
IS QSPI
DISABLED
QSPI FLOW 5
?
YES
NO
?
?
YES
NO
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