MC68HC16Z1 Datasheet, PDF (413/500 Pages) Freescale Semiconductor, Inc – M68HC16Z Series

Freescale Semiconductor, Inc.
STOP — Low-Power Stop Mode Enable
0 = QSM clock operates normally.
1 = QSM clock is stopped.
When STOP is set, the QSM enters low-power stop mode. The system clock input to
the module is disabled. While STOP is set, only QSMCR reads and writes are guar-
anteed to be valid, but only writes to the QSPI RAM and other QSM registers are guar-
anteed valid. The SCI receiver and transmitter and the QSPI should be disabled
before STOP is set. To stop the QSPI, set the HALT bit in SPCR3, wait until the HAL-
TA flag is set, then set STOP. To stop the SCI, clear the TS and RE bits in SCCR1.
FRZ1 — FREEZE Assertion Response
FRZ1 determines what action is taken by the QSPI when the IMB FREEZE signal is
asserted.
0 = Ignore the IMB FREEZE signal.
1 = Halt the QSPI on a transfer boundary.
FRZ0 — Not Implemented
Bits [12:8] — Not Implemented
SUPV — Supervisor/Unrestricted
This bit has no effect because the CPU16 in the MCU operates only in supervisor
mode.
Bits [6:4] — Not Implemented
IARB[3:0] — Interrupt Arbitration ID
The IARB field is used to arbitrate between simultaneous interrupt requests of the
same priority. Each module that can generate interrupt requests must be assigned a
unique, non-zero IARB field value in order to request an interrupt.
D.6.2 QSM Test Register
QTEST — QSM Test Register
Used for factory test only.
$YFFC02
D.6.3 QSM Interrupt Level Register/Interrupt Vector Register
QILR — QSM Interrupt Levels Register
QIVR — QSM Interrupt Vector Register
$YFFC04
$YFFC05
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
NOT USED
ILQSPI[2:0]
ILSCI[2:0]
INTV[7:0]
RESET:
0
0
0
0
0
0
0
0
0
0
1
1
1
1
The values of ILQSPI[2:0] and ILSCI[2:0] in QILR determine the priority of QSPI and
SCI interrupt requests. QIVR determines the value of the interrupt vector number the
QSM supplies when it responds to an interrupt acknowledge cycle.
M68HC16 Z SERIES
USER’S MANUAL
REGISTER SUMMARY
For More Information On This Product,
Go to: www.freescale.com
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