mcf5282 Freescale Semiconductor, Inc, mcf5282 Datasheet - Page 410

• Manufacturer Part Number: mcf5282
• Manufacturer: Freescale Semiconductor, Inc

Queued Serial Peripheral Interface (QSPI)
22.3.3
The QSPI wrap register provides halt transfer control, wraparound settings, and queue pointer locations.
22.3.4
The QIR contains QSPI interrupt enables and status flags.
22-6
IPSBAR
NEWQP
ENDQP
IPSBAR
CPTQP
WREN
WRTO
Offset:
Field
HALT
CSIV
11–8
Offset:
Reset
7–4
3–0
Reset
15
14
13
12
W
W
R
R
0x00_0348 (QWR)
0x00_034C (QIR)
WCEFB ABRTB
HALT WREN WRTO CSIV
Halt transfers. Assertion of this bit causes the QSPI to stop execution of commands after 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 entry pointed to by
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 command RAM entry during
1 QSPI chip select outputs return to one when not driven from the value in the current command RAM entry during
End of queue pointer. Points to the RAM entry that contains the last transfer description 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.
Start of queue pointer. This 4-bit field points to the first entry in the RAM to be executed on initiating a transfer.
15
0
15
0
QWR[NEWQP] and continue execution.
a transfer (that is, inactive state is 0, chip selects are active high).
a transfer (that is, inactive state is 1, chip selects are active low).
QSPI Wrap Register (QWR)
QSPI Interrupt Register (QIR)
14
0
14
0
13
0
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3
13
0
0
ABRTL WCEFE ABRTE
12
0
12
0
Figure 22-6. QSPI Interrupt Register (QIR)
Figure 22-5. QSPI Wrap Register (QWR)
Table 22-5. QWR Field Descriptions
11
0
11
0
10
0
ENDQP
10
0
0
9
Description
0
0
9
0
8
SPIFE
0
8
7
0
0
0
7
0
6
CPTQP
0
0
6
0
5
0
0
5
0
4
0
0
4
WCEF ABRT
w1c
Freescale Semiconductor
0
3
0
3
Access: User read/write
Access: User read/write
w1c
NEWQP
0
2
0
2
0
1
0
0
1
SPIF
w1c
0
0
0
0