PXD20RM Datasheet, PDF (1298/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

37.3.1.5 Functional Event Alternate Request Register (RGM_FEAR)
Address 0xC3FE_4010
Access: Supervisor read/write
0
1
2
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11
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W
POR 0
0
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Figure 37-6. Functional Event Alternate Request Register (RGM_FEAR)
This register defines an alternate request to be generated when a reset on a functional event has been
disabled. The alternate request can be either a SAFE mode request to MC_ME or an interrupt request to
the system. It can be accessed in read/write in either supervisor mode or test mode. It can be accessed in
read only in user mode.
Table 37-7. Functional Event Alternate Request Register (RGM_FEAR) Field Descriptions
Field
Description
AR_EXR
Alternate Request for External Reset
0 Generate a SAFE mode request on an external reset event if the reset is disabled
1 Generate an interrupt request on an external reset event if the reset is disabled
AR_FMPLL1 Alternate Request for FMPLL1 fail fatal error
0 Generate a SAFE mode request on an FMPLL1 fail fatal error event if the reset is disabled
1 Generate an interrupt request on an FMPLL1 fail fatal error event if the reset is disabled
AR_LVD45 Alternate Request for 4.5V low-voltage detected
0 Generate a SAFE mode request on a 4.5V low-voltage detected event if the reset is disabled
1 Generate an interrupt request on a 4.5V low-voltage detected event if the reset is disabled
AR_CMU0_F Alternate Request for CMU0 clock frequency higher/lower than reference
HL
0 Generate a SAFE mode request on a CMU0 clock frequency higher/lower than reference event if the reset is
disabled
1 Generate an interrupt request on a CMU0 clock frequency higher/lower than reference event if the reset is
disabled
AR_CMU0_
OLR
Alternate Request for FXOSC frequency lower than reference
0 Generate a SAFE mode request on a FXOSC frequency lower than reference event if the reset is disabled
1 Generate an interrupt request on a FXOSC frequency lower than reference event if the reset is disabled
Note: For the case when RGM_FERD[D_CMU0_OLR] = 1 & RGM_FEAR[AR_CMU0_OLR] = 1 a RGM
interrupt will not be generated for a FXOSC failure when the System Clock = FXOSC as there will be no
System Clock to execute the interrupt service routine. However, the interrupt service routine will be
executed if the FXOSC recovers at some point. The recommended use case for this feature is when the
System Clock = FIRC or FMPLL.
AR_FMPLL0 Alternate Request for FMPLL0 fail
0 Generate a SAFE mode request on a FMPLL0 fail event if the reset is disabled
1 Generate an interrupt request on a FMPLL0 fail event if the reset is disabled
AR_SOFT Alternate Request for software reset
0 Generate a SAFE mode request on a software reset event if the reset is disabled
1 Generate an interrupt request on a software reset event if the reset is disabled
37-22
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
Freescale Semiconductor