NXP Semiconductors MPC5606S - Chapter 31; Functional Event Status Register (RGM_FES)

Reset Generation Module (MC_RGM)
MPC5606S Microcontroller Reference Manual, Rev. 7
Freescale Semiconductor 1077
31.3.1.1 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.
NOTE
Clearing each flag in this register requires two clock cycles because of a
synchronization mechanism. As a consequence if a reset occurs while
clearing is on-going the reset may interrupt the clearing mechanism leaving
the flag set.
Address 0xC3FE_4000 Access: Supervisor read/write
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R
F_EXR
F_FLASH
F_LVD45
F_CMU0_FHL
F_CMU0_OLR
F_FMPLL0
F_CHKSTOP
F_SOFT
F_CORE
F_JTAG
W w1c w1c w1c w1c w1c w1c w1c w1c w1c w1c
POR 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Figure 31-2. Functional Event Status Register (RGM_FES)
Table 31-3. 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 power-on reset
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 power-on reset
1 A code or data flash fatal error event has occurred
F_LVD45 Flag for 4.5V low-voltage detected
0 No 4.5V low-voltage detected event has occurred since either the last clear or the last power-on reset
1 A 4.5V low-voltage detected event has occurred
F_CMU0_FH
L
Flag for CMU0 clock frequency higher/lower than reference
0 No CMU0 clock frequency higher/lower than reference event has occurred since either the last clear or the
last power-on reset
1 A CMU0 clock frequency higher/lower than reference event has occurred
F_CMU0_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 power-on
reset
1 A FXOSC frequency lower than reference event has occurred
F_FMPLL0 Flag for FMPLL0 fail
0 No FMPLL0 fail event has occurred since either the last clear or the last power-on reset
1 A FMPLL0 fail event has occurred