MPC5604B/C Microcontroller Reference Manual, Rev. 8
198 Freescale Semiconductor
9.3.1.5 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.
Address 0xC3FE_4010 Access: Supervisor read/write
0123456789101112131415
R
AR_EXR
000000
AR_FLASH
AR_LVD45
AR_CMU_FHL
AR_CMU_OLR
AR_FMPLL
AR_CHKSTOP
AR_SOFT
AR_CORE
AR_JTAG
W
POR0000000000000000
Figure 9-6. Functional Event Alternate Request Register (RGM_FEAR)
Table 9-7. 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_FLASH Alternate Request for code or data flash fatal error
0 Generate a SAFE mode request on a code or data flash fatal error event if the reset is
disabled
1 Generate an interrupt request on a code or data flash fatal error event if the reset is disabled
AR_LVD45 Alternate Request for 4.5 V low-voltage detected
0 Generate a SAFE mode request on a 4.5 V low-voltage detected event if the reset is
disabled
1 Generate an interrupt request on a 4.5 V low-voltage detected event if the reset is disabled
AR_CMU_FHL Alternate Request for CMU clock frequency higher/lower than reference
0 Generate a SAFE mode request on a CMU clock frequency higher/lower than reference
event if the reset is disabled
1 Generate an interrupt request on a CMU clock frequency higher/lower than reference event
if the reset is disabled
AR_CMU_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
For the case when RGM_FERD[D_CMU_OLR] = 1 & RGM_FEAR[AR_CMU_OLR] = 1, an
RGM interrupt will not be generated for an 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_FMPLL Alternate Request for FMPLL fail
0 Generate a SAFE mode request on a FMPLL fail event if the reset is disabled
1 Generate an interrupt request on a FMPLL fail event if the reset is disabled
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