Freescale Semiconductor FlexRay MFR4310, Reference Manual

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Clocks and Reset Generator (CRG)
MFR4310 Reference Manual, Rev. 2
Freescale Semiconductor 227
Figure 6-3. CRG Power On Reset
6.4.1.2 Low Voltage and Clock Monitor Reset
When the low voltage reset or clock monitor failure (if enabled) signal is asserted, the CRG asserts the
system reset signal. The CRG synchronously deasserts the system reset signal approximately 16420
EXTAL/CLK_CC clock periods after the deassertion of the low voltage reset or clock monitor failure
signal.
The CRG resets the DER.CMIE bit to 0, asserts the INT_CC# interrupt line, and sets the low voltage reset
interrupt flag, CRSR.LVIF , on the rising edge of the low voltage reset signal.
The CRG resets the DER.CMIE bit to 0, asserts the INT_CC# interrupt line, and sets the clock monitor
failure interrupt flag, CRSR.CMIF , on the rising edge of the clock monitor failure signal (if this is enabled).
NOTE
The CRG deasserts the INT_CC# signal when the CRSR.PRIF,
CRSR.LVIF, CRSR.CMIF and CRSR.ERIF bits are 0.
Figure 6-4 and Figure 6-5 show the operations performed by the CRG when a low voltage reset or a clock
monitor failure (if enabled) signal occurs.
VDD2_5
power-on reset
system reset
~16420 EXTAL/CLK_CC periods
CRSR.PRIF
INT_CC#