MPC5604B/C Microcontroller Reference Manual, Rev. 8
Freescale Semiconductor 193
9.3.1.1 Functional Event Status Register (RGM_FES)
This register contains the status of the last asserted functional reset sources. It can be accessed in read/write
on either supervisor mode or test mode. Register bits are cleared on write ‘1’.
Address 0xC3FE_4000 Access: Supervisor read/write
0123456789101112131415
R
F_EXR
000000
F_FLASH
F_LVD45
F_CMU_FHL
F_CMU_OLR
F_FMPLL
F_CHKSTOP
F_SOFT
F_CORE
F_JTAG
Ww1c
POR0000000000000000
Figure 9-2. Functional Event Status Register (RGM_FES)
Table 9-3. Functional Event Status Register (RGM_FES) Field Descriptions
Field Description
F_EXR Flag for External Reset
0 No external reset event has occurred since either the last clear or the last destructive reset
assertion
1 An external reset event has occurred
F_FLASH Flag for code or data flash fatal error
0 No code or data flash fatal error event has occurred since either the last clear or the last destructive
reset assertion
1 A code or data flash fatal error event has occurred
F_LVD45 Flag for 4.5 V low-voltage detected
0 No 4.5 V low-voltage detected event has occurred since either the last clear or the last destructive
reset assertion
1 A 4.5 V low-voltage detected event has occurred
F_CMU_FHL Flag for CMU clock frequency higher/lower than reference
0 No CMU clock frequency higher/lower than reference event has occurred since either the last clear
or the last destructive reset assertion
1 A CMU clock frequency higher/lower than reference event has occurred
F_CMU_OL
R
Flag for FXOSC frequency lower than reference
0 No FXOSC frequency lower than reference event has occurred since either the last clear or the
last destructive reset assertion
1 A FXOSC frequency lower than reference event has occurred
F_FMPLL Flag for FMPLL fail
0 No FMPLL fail event has occurred since either the last clear or the last destructive reset assertion
1 A FMPLL fail event has occurred
F_CHKSTOP Flag for checkstop reset
0 No checkstop reset event has occurred since either the last clear or the last destructive reset
assertion
1 A checkstop reset event has occurred
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