mc68hc916y3 Freescale Semiconductor, Inc, mc68hc916y3 Datasheet - Page 243

• Manufacturer Part Number: mc68hc916y3
• Description: Mc68hc16y3 16 Bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

MC68HC16Y3/916Y3
USER’S MANUAL
Figure 11-4 shows QSPI initialization. Figures 11-5 through 11-9 show QSPI master
and slave operation. The CPU16 must initialize the QSM global and pin registers and
the QSPI control registers before enabling the QSPI for either mode of operation. The
command queue must be written before the QSPI is enabled for master mode opera-
tion. Any data to be transmitted should be written into transmit RAM before the QSPI
is enabled. During wrap-around operation, data for subsequent transmissions can be
written at any time.
Figure 11-4 Flowchart of QSPI Initialization Operation
Freescale Semiconductor, Inc.
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QUEUED SERIAL MODULE
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CONTROL REGISTERS
PORTQS, AND DDRQS
GLOBAL REGISTERS
INITIALIZE QSPI RAM
INITIALIZE PQSPAR,
INITIALIZE QSPI
INITIALIZE QSM
IN THIS ORDER
ENABLE QSPI
MSTR = 1 ?
BEGIN
A2
N
Y
A1
QSPI INITIALIZATION
MOTOROLA
QSPI FLOW 1
11-11