MCF5282CVM66 Datasheet, PDF (139/766 Pages) Freescale Semiconductor, Inc – MCF5282 and MCF5216 ColdFire® Microcontroller User’s Manual

Power Management
NOTE
Only fixed (external) interrupt can bring a device out of stop mode. To exit
from other low-power modes, such as doze or wait, either fixed or
programmable interrupts may be used; however, the module generating the
interrupt must be enabled in that particular low-power mode.
5. Once an appropriately-high interrupt request level arrives, the interrupt controller signals its
presence, and the SIM responds by asserting the request to exit low-power mode.
6. The low-power mode control logic senses the request signal and re-enables the appropriate
clocks.
7. With the processor clocks enabled, the core processes the pending interrupt request.
7
6
4
3
0
Field ENBSTOP
XLPM_IPL
—
Reset 1/0
0
1/0
0
Undefined
R/W
R/W
Address
IPSBAR + 0x012
Figure 7-1. Low-Power Interrupt Control Register (LPICR)
Table 7-2. LPICR Field Descriptions
Bits
Name
Description
7
ENBSTOP Enable low-power stop mode.
0 Low-power stop mode disabled
1 Low-power stop mode enabled. Once the core is stopped and the signal to enter stop
mode is asserted, processor clocks can be disabled.
6–4
XLPM_IPL Exit low-power mode interrupt priority level. This field defines the interrupt priority level
needed to exit the low-power mode.Refer to Table 7-3.
3–0
—
Reserved, should be cleared.
XLPM_IPL[2:0]
000
001
010
011
100
101
11x
Table 7-3. XLPM_IPL Settings
Interrupts Level Needed to Exit Low-Power Mode
Any interrupt request exits low-power mode
Interrupt request levels [2-7] exit low-power mode
Interrupt request levels [3-7] exit low-power mode
Interrupt request levels [4-7] exit low-power mode
Interrupt request levels [5-7] exit low-power mode
Interrupt request levels [6-7] exit low-power mode
Interrupt request level [7] exits low-power mode
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3
Freescale Semiconductor
7-3