QUEUED SERIAL MODULE
M68HC16 Z SERIES
9-14
USER’S MANUAL
Figure 9-8 Flowchart of QSPI Slave Operation (Part 1)
READ TRANSMIT DATA
FROM RAM USING QUEUE
POINTER ADDRESS
A2
QUEUE POINTER
CHANGED TO NEWQP
N
Y
N
WRITE QUEUE POINTER TO
CPTQP STATUS BITS
STORE RECEIVED DATA
IN RAM USING QUEUE
POINTER ADDRESS
B2
QSPI CYCLE BEGINS
(SLAVE MODE)
Y
EXECUTE SERIAL TRANSFER
WHEN SCK RECEIVED
N
Y
IS SLAVE
SELECT PIN
ASSERTED
HAS NEWQP
BEEN WRITTEN
IS QSPI
DISABLED
QSPI SLV1 FLOW 5
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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