mcf5272 Freescale Semiconductor, Inc, mcf5272 Datasheet - Page 350

• Manufacturer Part Number: mcf5272
• Description: Mcf5272 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

Address
Reset
Field
R/W
Programming Model
14.5.3 QSPI Wrap Register (QWR)
Table 14-5 gives QWR field descriptions.
14.5.4 QSPI Interrupt Register (QIR)
Figure 14-7 shows the QSPI interrupt register.
Address
14-12
Reset
Field
R/W
11–8
Bits
7–4
3–0
15
14
13
12
HALT WREN WRTO CSIV
15
WCEFB ABRTB
15
NEWQP Start of queue pointer. This 4-bit field points to the first entry in the RAM to be executed
ENDQP End of queue pointer. Points to the RAM entry that contains the last transfer description
CPTQP
WREN
WRTO
Name
HALT
CSIV
14
14
Halt transfers. Assertion of this bit causes the QSPI to stop execution of commands once
it has completed execution of the current command.
Wraparound enable. Enables wraparound mode.
0 Execution stops after executing the command pointed to by QWR[ENDQP].
1 After executing command pointed to by QWR[ENDQP], wrap back to entry zero, or the
Wraparound location. Determines where the QSPI wraps to in wraparound mode.
0 Wrap to RAM entry zero.
1 Wrap to RAM entry pointed to by QWR[NEWQP].
QSPI_CS inactive level.
0 QSPI chip select outputs return to zero when not driven from the value in the current
1 QSPI chip select outputs return to one when not driven from the value in the current
in the queue.
Completed queue entry pointer. Points to the RAM entry that contains the last command
to have been completed. This field is read only.
on initiating a transfer.
13
entry pointed to by QWR[NEWQP] and continue execution.
command RAM entry during a transfer (that is, inactive state is 0, chip selects are
active high).
command RAM entry during a transfer (that is, inactive state is 1, chip selects are
active low).
Figure 14-7. QSPI Interrupt Register (QIR)
— ABRTL WCEFE ABRTE — SPIFE
13
Figure 14-6. QSPI Wrap Register (QWR)
Table 14-5. QWR Field Descriptions
12
12
11
MCF5272 User’s Manual
11
ENDQP
0000_0000_0000_0000
0000_0000_0000_0000
10
MBAR + 0x00AC
MBAR + 0x00A8
R/W
R/W
9
8
Description
8
7
7
–
—
4
4
WCEF ABRT — SPIF
3
3
NEWQP
2
MOTOROLA
1
0
0